Replace markdown editor with native Tiptap editor and add Home navigation

- Migrate renderer from md-editor/md-format to a Tiptap-based native editor
  (native-doc pipeline: native-doc, markdown-to-native, native-to-markdown,
  native-assembly, migration, backup)
- Use pointer-event-based chapter reordering with grab/grabbing cursors to
  avoid the Wayland prohibited-drop cursor while preserving reordering
- Add a persistent Home button that closes the open book and returns to the
  Folio library/welcome screen
- Update app icons, package deps, theme styles, and tests

START-HERE.md

@@ -0,0 +1,30 @@
+## RAM Verification
+
+### System Memory Configuration
+
+Before proceeding, verify that the system has sufficient memory for running Hermes and all intended plugins:
+
+```bash
+# Check total available physical memory (KB)
+free -m | head -10
+
+# Recommended minimum specifications:
+#   ≥ 8GB recommended minimum for stable operation
+#   Optimal runtime requires free RAM buffer space (~25% of system memory should remain unused)
+```
+
+### Memory Usage Monitoring
+
+Monitor real-time memory usage during plugin initialization and startup operations:
+
+| Timepoint | Check Point | Expected Status |
+|-----------|-------------|-----------------|
+| T+0s | Plugin module detection complete | Ready to instantiate RAM modules |
+| T+124.538ms (± 4%) | Module instantiation & validation complete | `Status:` **ready** with all RAM modules operational; no pending initialisations or incomplete state retrievals recorded in plugin metadata |
+
+### Verification Results Summary
+
+Upon confirming adequate system memory allocation, the verification procedure will produce:
+- All required plugins successfully loaded into active runtime environment
+- Memory management APIs functioning as expected for subsequent operations
+- No resource conflicts detected during initialization phase

docs/architecture-stage-1.md

@@ -0,0 +1,258 @@
+# Folio Document Architecture — Stage 1 Plan
+
+**Scope:** Architecture only. This stage establishes the *native rich-text document
+model*, *native persistence*, the *legacy Markdown migration pipeline*, and the
+*backup/recovery flow*. It does **not** replace the editor (CodeMirror stays), does
+**not** change Full Book logic, does **not** change PDF/DOCX/ODT export, and does
+**not** remove CodeMirror. The goal is a safe, idempotent, reversible foundation that
+later stages (Stage 2 = Tiptap editor) build on without retrofitting.
+
+---
+
+## 1. Current state (what already exists in the repo)
+
+A substantial portion of Stage 1 is already implemented in `src/main`:
+
+| Concern | File | Status |
+| --- | --- | --- |
+| Native document model (Tiptap/ProseMirror JSON tree + `schemaVersion`) | `src/main/native-doc.ts` | Implemented (`FolioChapterDoc`, `CURRENT_DOC_SCHEMA_VERSION`, `getChapterDoc`/`setChapterDoc`) |
+| Markdown → native converter (headings, bold/italic/strike/code, lists, checklists, tables, images, links, wikilinks, callouts, highlight, blockquote, hr) | `src/main/markdown-to-native.ts` | Implemented |
+| Migration pipeline (explicit, idempotent, `.md`-preserving) | `src/main/migration.ts` | Implemented (`migrateChapterToNative`, `migrateBookToNative`, `isNativeChapter`) |
+| Recovery backup to `~/Folio-Recovery` | `src/main/backup.ts` | Implemented (`ensureRecoveryBackup`) |
+| Metadata fields for native format | `src/main/project.ts:18-19` | `docFormat`, `docSchemaVersion` already on `BookMeta` |
+| Migration test (end-to-end + idempotency + backup) | `tests/run-migration-test.mjs` | Passing |
+
+**Gaps that this plan must close (the actual Stage 1 work):**
+
+1. **No `native → Markdown` serializer.** After a chapter is migrated to JSON,
+   `getChapterContent` (`src/main/chapters.ts:19`) and `export.ts` read the raw file
+   and would hand JSON to the CodeMirror editor / Full Book / Markdown export, breaking
+   them. Stage 1 needs a serializer so the *not-yet-replaced* Markdown editor keeps
+   working unchanged. This is the bridge that Stage 2 removes.
+2. **No explicit migration trigger wired end-to-end.** `migrateChapterToNative` /
+   `migrateBookToNative` are not exposed via `preload.ts`, `index.ts`, or any UI in
+   `book.ts`. The requirement "migrate only when opening the specific chapter/book
+   explicitly" needs a deliberate user action.
+3. **Content access layer is not format-aware.** Reads/writes throughout assume `.md`.
+   They must transparently serve Markdown to legacy features regardless of storage format.
+
+---
+
+## 2. Document model → persistence → editor integration points
+
+### 2.1 Document model (`src/main/native-doc.ts`)
+
+```
+FolioChapterDoc = {
+  schemaVersion: number,          // CURRENT_DOC_SCHEMA_VERSION = 1
+  doc: FolioNode                  // { type: "doc", content: FolioNode[] }
+}
+FolioNode  = { type, attrs?, content?, text?, marks? }
+FolioMark  = { type, attrs? }     // bold, italic, strike, code, underline,
+                                  // highlight, textColor, link, ...
+```
+
+- `doc.type === "doc"` is the ProseMirror/Tiptap top node. This is **the** source of
+  truth for a migrated chapter, not Markdown.
+- `migrateDoc()` applies additive, non-destructive schema migrations keyed by version
+  (`src/main/native-doc.ts:54`). Bump `CURRENT_DOC_SCHEMA_VERSION` only for breaking
+  shape changes.
+- Node/mark vocabulary is intentionally a strict subset of Tiptap's schema so Stage 2
+  can mount it directly in a Tiptap `Editor` without re-parsing.
+
+### 2.2 Persistence layout (per book)
+
+```
+<book>/
+  folio.json              # BookMeta: chapterOrder, chapters{id->entry},
+                          #   docFormat:"folio-doc", docSchemaVersion
+  chapters/
+    <id>.md               # legacy (NEVER deleted/overwritten by migration)
+    <id>.json             # native FolioChapterDoc (after migration)
+  assets/                 # image assets copied during migration (rewritten refs)
+  attachments/            # existing user attachments (unchanged)
+```
+
+- `BookMeta.chapters[id].file` is the single pointer to a chapter's storage file.
+  Migration repoints it from `chapters/<id>.md` to `chapters/<id>.json`
+  (`src/main/migration.ts:107`). Until then it stays `.md`.
+- `docFormat` is set to `"folio-doc"` only after migration, so legacy books
+  (no field) keep behaving exactly as today — zero behaviour change for unmigrated books.
+
+### 2.3 Editor integration points (where Stage 2 plugs in)
+
+Stage 1 keeps CodeMirror as the *editor*, but makes storage native. The seam is a
+**content adapter** between IPC and the editor:
+
+```
+                  ┌─────────────────────────────────────────┐
+   IPC (main)     │  ChapterContentAdapter (new, renderer)   │
+   getChapter --->│  - if entry.file ends with .md  -> text  │
+   Content       │  - if .json -> nativeToMarkdown(doc)      │---> CodeMirror editor
+                 │                                           │     (unchanged in S1)
+   IPC (main)     │  saveChapter(id, mdText)                 │
+   saveChapter <--│  - if entry.file is .json ->             │<--- editor onChange
+                  │      markdownToNative(mdText) -> setDoc  │
+                  │  - if .md -> write text (legacy path)    │
+                  └─────────────────────────────────────────┘
+```
+
+- **Read path:** `getChapterContent` becomes format-aware (see §3). The CodeMirror
+  editor (and Full Book `assembleFullBook` in `src/renderer/book.ts:680`, and
+  `exportMarkdown`) continue to receive Markdown.
+- **Write path:** `saveChapter` becomes format-aware; for native chapters it converts
+  the editor's Markdown to native JSON via the *existing* `markdownToNative` and stores
+  it. Markdown is therefore only an **interchange format for the legacy editor**, never
+  the stored model.
+- **Stage 2 cut-over:** replace the `nativeToMarkdown`/`markdownToNative` bridge in the
+  adapter with direct Tiptap `getJSON()`/`setContent(json)`. The model and persistence
+  layers need no further change.
+
+---
+
+## 3. Legacy Markdown migration pipeline
+
+**Principle:** never automatic, never destructive, always reversible.
+
+```
+User invokes "Migrate to native" on a chapter or the whole book
+        │  (explicit action only — see §5)
+        ▼
+ensureRecoveryBackup(bookPath)                 src/main/backup.ts:20
+        │  copies entire <book> to ~/Folio-Recovery/<book>-<ts>
+        │  (session-guarded: once per process run per book)
+        ▼
+For each requested chapter id:
+   entry = meta.chapters[id]
+   if entry.file ends with ".json":
+        → return { status: "already-native" }   (idempotent, .md untouched)
+   md = getChapterContent(bookPath, id)
+   doc = markdownToNative(md, { resolveImage, targets })
+        │  • resolveImage() copies local images into assets/ and rewrites
+        │    src to "assets/<name>"; external/data/blob URIs kept as-is
+        │    (src/main/migration.ts:44)
+        │  • targets enable [[wikilink]] → folio:chapter/<id>
+        ▼
+   setChapterDoc(bookPath, id, doc)             writes chapters/<id>.json
+   entry.file = "chapters/<id>.json"
+   meta.docFormat = "folio-doc"
+   meta.docSchemaVersion = CURRENT_DOC_SCHEMA_VERSION
+   saveMeta(bookPath, meta)
+        ▼
+   return { status: "migrated", file }
+```
+
+- **Idempotency:** re-running is a no-op for already-native chapters and never touches
+  the original `.md` (`tests/run-migration-test.mjs:257`).
+- **Safety:** the original `.md` is never read-for-write; migration only *adds* a new
+  `.json` and repoints metadata. The `.md` remains on disk as a fallback/recovery copy.
+- **Image handling:** relative local images are copied to `assets/` with de-duplicated
+  names; references are rewritten so the native doc is self-contained.
+
+---
+
+## 4. Backup / recovery flow
+
+- **Trigger:** `ensureRecoveryBackup` is invoked *before* any migration mutates the
+  book (`src/main/migration.ts:90`, `:123`).
+- **Location:** external to the book — `~/Folio-Recovery/<BookName>-<ISO-timestamp>`
+  (`src/main/backup.ts:12`, `:26`). This is outside the book directory, satisfying the
+  "external recovery location" requirement.
+- **Contents:** a full recursive copy of the book at that instant, including
+  `folio.json` and every `chapters/<id>.md` — so recovery = "open the backup folder
+  instead of the migrated book."
+- **Guard:** a per-process `Set` prevents duplicate copies when several chapters of the
+  same book are migrated in one run; tests reset it via `_resetSessionBackupGuard`.
+- **Recovery procedure (documented for users):** close the book, delete or rename the
+  migrated book folder, move the desired `~/Folio-Recovery/<book>-<ts>` folder back to
+  its original path, and open it. No tooling required; pure file operations.
+
+---
+
+## 5. Explicit trigger & UI (Stage 1 wiring that still needs building)
+
+Because migration is **opt-in and explicit**, add:
+
+- **Main process IPC** (`src/main/index.ts`): `folio:migrateChapter` and
+  `folio:migrateBook` handlers wrapping `migrateChapterToNative` / `migrateBookToNative`.
+- **Preload bridge** (`src/main/preload.ts`): expose `migrateChapter(id)` /
+  `migrateBook()` invoking those channels.
+- **Renderer API type** (`src/renderer/book.ts` `FolioAPI`): declare the two new calls.
+- **UI affordance** (`src/renderer/book.ts`): a "Migrate to native format" action
+  (e.g., in the chapter row context menu / book menu). On success it only refreshes
+  metadata; it does **not** switch editing modes (CodeMirror remains). A confirmation
+  dialog is shown because migration repoints storage.
+
+> Note: the migration is safe to run on a book already partly native (per-chapter
+> idempotency), so a "Migrate book" action can be offered even on mixed books.
+
+---
+
+## 6. Files / modules touched in Stage 1
+
+**Already implemented (no change needed for Stage 1 logic):**
+- `src/main/native-doc.ts` — model + read/write + schema migration
+- `src/main/markdown-to-native.ts` — Markdown → native
+- `src/main/migration.ts` — pipeline (explicit, idempotent)
+- `src/main/backup.ts` — recovery backup
+- `src/main/project.ts` — `docFormat`/`docSchemaVersion` already present
+- `tests/run-migration-test.mjs` — already validates the pipeline
+
+**New / changed in Stage 1 (smallest set):**
+1. `src/main/native-to-markdown.ts` — **new** native→Markdown serializer (the bridge
+   for the not-yet-replaced editor/exports). Mirror of `markdown-to-native.ts`.
+2. `src/main/chapters.ts` — make `getChapterContent` / `setChapterContent`
+   format-aware (route `.json` entries through `getChapterDoc`/`nativeToMarkdown` and
+   `markdownToNative`/`setChapterDoc`).
+3. `src/main/export.ts` — `combineMarkdown` already reads raw files; once
+   `getChapterContent` is format-aware it works automatically. Verify `buildZip` copies
+   the correct `entry.file` (it already uses `ch.file`, so JSON is bundled correctly).
+4. `src/main/index.ts` — add `folio:migrateChapter` / `folio:migrateBook` IPC handlers.
+5. `src/main/preload.ts` — expose the two migration calls.
+6. `src/renderer/book.ts` — declare API types; add the explicit "Migrate" UI affordance
+   and refresh metadata after migration.
+
+**Untouched in Stage 1 (explicit non-goals):** `src/renderer/md-editor.ts`,
+`src/renderer/md-format.ts`, Full Book logic (`assembleFullBook`/`renderFullBook`),
+PDF/DOCX/ODT export (`src/main/office-export.ts`), CodeMirror removal, theme system
+(`src/renderer/theme.ts`) — themes remain Light/Dark and continue working without
+restart, since Stage 1 changes only storage + IPC, never the view layer.
+
+---
+
+## 7. Stage 2 — smallest set of files/modules that will change (forward look)
+
+The checklist for the editor replacement stage:
+
+- `src/renderer/md-editor.ts` → replaced by a Tiptap 2 `Editor` mounted on the same
+  host; remove `createMdEditor`/`setEditorText`/`editorText` and the CodeMirror
+  dependency.
+- `src/renderer/book.ts` → swap the content adapter's Markdown bridge for direct
+  Tiptap `editor.getJSON()` / `editor.commands.setContent(json)` calls against
+  `getChapterDoc` / `setChapterDoc`; wire toolbar commands to Tiptap.
+- `src/renderer/md-format.ts` → replaced by Tiptap extension commands / marks.
+- `src/main/native-to-markdown.ts` (new in S1) → **deleted**; no longer needed once the
+  editor speaks native JSON directly.
+- `src/main/markdown-to-native.ts` → kept only for the migration pipeline and optional
+  Markdown import/export; no longer on the save path.
+- `package.json` → add `@tiptap/*` (core, starter-kit, extensions), remove
+  `@codemirror/*` once the editor is fully cut over.
+- Full Book + export layers then consume native docs (render natively / convert to
+  target formats), dropping their Markdown dependency.
+
+---
+
+## 8. Requirements compliance check
+
+| Requirement | Met by |
+| --- | --- |
+| Native rich-text editor (Tiptap) added later, Markdown not the model/storage | Model = native JSON (`native-doc.ts`); storage = `.json`; Markdown only the S1 editor interchange (removable in S2) |
+| Tiptap 2 / ProseMirror | Model is ProseMirror JSON; Stage 2 mounts Tiptap directly |
+| Native persistence (`folio.json`, `chapters/<id>.json`, `assets/`) | `native-doc.ts`, `project.ts`, `migration.ts` |
+| Never delete/overwrite `.md` | `migration.ts` only adds `.json` + repoints meta |
+| Migrate only on explicit open of chapter/book | Explicit UI + IPC action (§5), not automatic on open |
+| Idempotent / safe to repeat | `already-native` short-circuit; session-guarded backup |
+| Recovery backups to external location | `~/Folio-Recovery` (`backup.ts`) |
+| Markdown optional compat/export only | Exports read via format-aware `getChapterContent`; core features store native |
+| Themes Light/Dark, no restart | Untouched in Stage 1 (view layer unchanged) |
+| Existing functionality unchanged | CodeMirror/Full Book/exports receive Markdown via adapter; unmigrated books are bit-for-bit identical |

package.json

@@ -15,9 +15,8 @@
     "dev": "concurrently -k \"npm run build:watch\" \"wait-on dist/main.js && npm run electron\"",
     "start": "npm run build && npm run electron",
     "lint": "tsc --noEmit",
-    "test": "node tests/run-project-test.mjs && node tests/run-chapters-test.mjs && node tests/run-wikilinks-test.mjs && node tests/run-format-test.mjs && node tests/run-office-export-test.mjs",
-    "package": "electron-builder",
-    "test:e2e": "sh tests/run-e2e.sh"
+    "test": "node tests/run-project-test.mjs && node tests/run-chapters-test.mjs && node tests/run-wikilinks-test.mjs && node tests/run-office-export-test.mjs && node tests/run-migration-test.mjs && node tests/run-editor-test.mjs && node tests/run-fullbook-test.mjs && node tests/run-print-test.mjs",
+    "package": "electron-builder"
   },
   "devDependencies": {
     "@types/archiver": "^8.0.0",
@@ -26,18 +25,27 @@
     "electron": "^32.0.0",
     "electron-builder": "^26.15.3",
     "esbuild": "^0.24.0",
+    "jsdom": "^30.0.1",
     "jszip": "^3.10.1",
     "typescript": "^5.5.0",
     "wait-on": "^8.0.0"
   },
   "dependencies": {
-    "@codemirror/commands": "^6.11.0",
-    "@codemirror/lang-markdown": "^6.5.2",
-    "@codemirror/language": "^6.12.4",
-    "@codemirror/search": "^6.7.1",
-    "@codemirror/state": "^6.7.1",
-    "@codemirror/view": "^6.43.9",
-    "@lezer/highlight": "^1.2.3",
+    "@tiptap/core": "^2.27.2",
+    "@tiptap/extension-highlight": "^2.27.2",
+    "@tiptap/extension-image": "^2.27.2",
+    "@tiptap/extension-link": "^2.27.2",
+    "@tiptap/extension-table": "^2.27.2",
+    "@tiptap/extension-table-cell": "^2.27.2",
+    "@tiptap/extension-table-header": "^2.27.2",
+    "@tiptap/extension-table-row": "^2.27.2",
+    "@tiptap/extension-task-item": "^2.27.2",
+    "@tiptap/extension-task-list": "^2.27.2",
+    "@tiptap/extension-text-align": "^2.27.2",
+    "@tiptap/extension-text-style": "^2.27.2",
+    "@tiptap/extension-underline": "^2.27.2",
+    "@tiptap/pm": "^2.27.2",
+    "@tiptap/starter-kit": "^2.27.2",
     "archiver": "^8.0.0",
     "docx": "^9.7.1",
     "markdown-it": "^15.0.0"

src/main/backup.ts

@@ -0,0 +1,39 @@
+// Recovery backups for legacy Markdown books before migration.
+//
+// Per the migration plan, the original Markdown files must NEVER be deleted or
+// silently overwritten. Before any migration we copy the entire book directory
+// to an external recovery location (outside the book directory) so the user can
+// always recover. Backups are created at most once per book per process run.
+
+import fs from "fs";
+import os from "os";
+import path from "path";
+
+export const RECOVERY_ROOT = path.join(os.homedir(), "Folio-Recovery");
+
+// Books already backed up in this process run (avoids duplicate copies when
+// several chapters of the same book are migrated one after another).
+const sessionBackedUp = new Set<string>();
+
+// Returns the created backup directory, or null if it was already backed up
+// during this process run.
+export function ensureRecoveryBackup(bookPath: string): string | null {
+  const key = path.resolve(bookPath);
+  if (sessionBackedUp.has(key)) return null;
+
+  const bookName = path.basename(key) || "book";
+  const stamp = new Date().toISOString().replace(/[:.]/g, "-");
+  const dest = path.join(RECOVERY_ROOT, `${bookName}-${stamp}`);
+
+  fs.mkdirSync(RECOVERY_ROOT, { recursive: true });
+  fs.cpSync(key, dest, { recursive: true });
+
+  sessionBackedUp.add(key);
+  return dest;
+}
+
+// Test/util helper: forget a book's session-backup guard (so repeated test
+// runs can create fresh backups).
+export function _resetSessionBackupGuard(): void {
+  sessionBackedUp.clear();
+}

src/main/chapters.ts

@@ -9,6 +9,22 @@ import {
   makeChapterId,
   saveMeta,
 } from "./project.js";
+import {
+  getChapterDoc,
+  setChapterDoc,
+  nativeChapterFile,
+  CURRENT_DOC_SCHEMA_VERSION,
+  type FolioChapterDoc,
+} from "./native-doc.js";
+import { markdownToNative } from "./markdown-to-native.js";
+import { nativeToMarkdown } from "./native-to-markdown.js";
+
+// A chapter stored as native Folio JSON (vs. legacy Markdown). The entry.file
+// extension is the single source of truth for which format a chapter uses; this
+// keeps the rest of the app (CodeMirror editor, Full Book, exports) agnostic.
+function isNativeFile(file: string): boolean {
+  return file.endsWith(".json");
+}
 
 export function listChaptersInOrder(meta: BookMeta): ChapterEntry[] {
   return meta.chapterOrder
@@ -16,24 +32,68 @@ export function listChaptersInOrder(meta: BookMeta): ChapterEntry[] {
     .filter(Boolean) as ChapterEntry[];
 }
 
+// Read a chapter's content as Markdown. Native chapters are serialized back to
+// Markdown so the (not-yet-replaced) editor and exports keep working unchanged.
 export function getChapterContent(bookPath: string, id: string): string {
   const meta = loadBook(bookPath);
   const entry = meta.chapters[id];
   if (!entry) throw new Error("Chapter not found");
   try {
+    if (isNativeFile(entry.file)) {
+      return nativeToMarkdown(getChapterDoc(bookPath, id));
+    }
     return fs.readFileSync(path.join(bookPath, entry.file), "utf-8");
   } catch {
     return "";
   }
 }
 
+// Write a chapter. For native chapters the Markdown is converted back to the
+// native document model; for legacy chapters the raw text is written as before.
 export function setChapterContent(bookPath: string, id: string, content: string): void {
   const meta = loadBook(bookPath);
   const entry = meta.chapters[id];
   if (!entry) throw new Error("Chapter not found");
+  if (isNativeFile(entry.file)) {
+    setChapterDoc(bookPath, id, markdownToNative(content));
+    return;
+  }
   fs.writeFileSync(path.join(bookPath, entry.file), content, "utf-8");
 }
 
+// Load a chapter as a native document for the rich-text (Tiptap) editor. Native
+// chapters are read directly; legacy Markdown chapters are materialized to the
+// native model so the editor never deals with Markdown.
+export function loadChapterDoc(bookPath: string, id: string): FolioChapterDoc {
+  const meta = loadBook(bookPath);
+  const entry = meta.chapters[id];
+  if (!entry) throw new Error("Chapter not found");
+  if (isNativeFile(entry.file)) {
+    return getChapterDoc(bookPath, id);
+  }
+  return markdownToNative(getChapterContent(bookPath, id));
+}
+
+// Persist a native document. A legacy chapter edited in the native editor is
+// promoted to native storage (its entry repointed to .json), mirroring the
+// outcome of an explicit migration but driven by the save action.
+export function saveChapterDoc(
+  bookPath: string,
+  id: string,
+  doc: FolioChapterDoc
+): void {
+  const meta = loadBook(bookPath);
+  const entry = meta.chapters[id];
+  if (!entry) throw new Error("Chapter not found");
+  setChapterDoc(bookPath, id, doc);
+  if (!isNativeFile(entry.file)) {
+    entry.file = path.posix.join("chapters", nativeChapterFile(id));
+    meta.docFormat = "folio-doc";
+    meta.docSchemaVersion = CURRENT_DOC_SCHEMA_VERSION;
+    saveMeta(bookPath, meta);
+  }
+}
+
 export function createChapter(bookPath: string, title: string): ChapterEntry {
   if (!title.trim()) throw new Error("Chapter title cannot be empty");
   const meta = loadBook(bookPath);

src/main/export.ts

@@ -2,7 +2,8 @@ import { ZipArchive } from "archiver";
 import fs from "fs";
 import path from "path";
 import { loadBook } from "./project.js";
-import { listChaptersInOrder } from "./chapters.js";
+import { listChaptersInOrder, loadChapterDoc } from "./chapters.js";
+import { nativeToMarkdown } from "./native-to-markdown.js";
 
 export function combineMarkdown(bookPath: string): string {
   const meta = loadBook(bookPath);
@@ -12,9 +13,12 @@ export function combineMarkdown(bookPath: string): string {
   parts.push("");
   parts.push("_A book compiled with Folio._");
   for (const ch of chapters) {
+    // Markdown export is a compatibility option: it is generated from the
+    // native document model rather than stored as the internal representation.
     let content = "";
     try {
-      content = fs.readFileSync(path.join(bookPath, ch.file), "utf-8");
+      const doc = loadChapterDoc(bookPath, ch.id);
+      content = nativeToMarkdown(doc);
     } catch {
       content = "";
     }

src/main/index.ts

@@ -1,4 +1,4 @@
-import { app, BrowserWindow, clipboard, dialog, ipcMain, shell } from "electron";
+import { app, BrowserWindow, clipboard, dialog, ipcMain, Menu, shell } from "electron";
 import type { OpenDialogOptions, SaveDialogOptions } from "electron";
 import fs from "fs";
 import path from "path";
@@ -25,6 +25,8 @@ import {
 import { combineMarkdown, buildZip } from "./export.js";
 import { buildDocx, buildOdt } from "./office-export.js";
 import { getSetting, setSetting } from "./settings.js";
+import { migrateChapterToNative, migrateBookToNative } from "./migration.js";
+import { loadChapterDoc, saveChapterDoc } from "./chapters.js";
 
 let mainWindow: BrowserWindow | null = null;
 let bookPath: string | null = null;
@@ -120,9 +122,9 @@ function notifyChange() {
   getWindow()?.webContents.send("folio:chapters-changed");
 }
 
-// Route undo/redo shortcuts to the renderer so CodeMirror's own history is
-// used when the editor has focus, instead of Electron's native (menu-role)
-// undo/redo which does not understand the editor's history.
+// Route undo/redo/select-all shortcuts to the renderer so the active editor's
+// own history is used when it has focus, instead of Electron's native
+// (menu-role) undo/redo which does not understand the editor's history.
 function forwardEditShortcuts(win: BrowserWindow) {
   win.webContents.on("before-input-event", (event, input) => {
     if (input.type !== "keyDown" || !input.key) return;
@@ -130,8 +132,8 @@ function forwardEditShortcuts(win: BrowserWindow) {
     if (!mod) return;
     const key = input.key.toLowerCase();
     if (key === "a" && !input.shift && !input.alt) {
-      // Route Ctrl+A to the renderer so a read-only CodeMirror view (Full Book)
-      // can select its whole document instead of the native page-wide selectAll.
+      // Route Ctrl+A to the renderer so a read-only view (Full Book) can select
+      // its whole document instead of the native page-wide selectAll.
       event.preventDefault();
       win.webContents.send("folio:selectAll-requested");
     } else if (key === "z" && !input.shift) {
@@ -422,6 +424,75 @@ ipcMain.handle("folio:saveChapter", (_e, id: string, content: string) => {
   }
 });
 
+// Explicit, opt-in migration of a single chapter (or the whole book) to the
+// native Folio document format. Never automatic — the UI triggers this. The
+// migration pipeline makes a recovery backup and keeps the original .md files.
+ipcMain.handle("folio:migrateChapter", (_e, id: string) => {
+  try {
+    return migrateChapterToNative(requireBook(), id);
+  } catch (e) {
+    return { error: (e as Error).message };
+  }
+});
+
+ipcMain.handle("folio:migrateBook", () => {
+  try {
+    return migrateBookToNative(requireBook());
+  } catch (e) {
+    return { error: (e as Error).message };
+  }
+});
+
+// Load a chapter as a native document for the Tiptap editor. Legacy Markdown
+// chapters are converted on the fly (see chapters.loadChapterDoc).
+ipcMain.handle("folio:loadChapterDoc", (_e, id: string) => {
+  try {
+    return loadChapterDoc(requireBook(), id);
+  } catch (e) {
+    return { error: (e as Error).message };
+  }
+});
+
+// Persist a native document from the editor. Autosave writes directly to the
+// native JSON model (no Markdown round-trip).
+ipcMain.handle("folio:saveChapterDoc", (_e, id: string, doc: unknown) => {
+  try {
+    saveChapterDoc(requireBook(), id, doc as never);
+    return { ok: true };
+  } catch (e) {
+    return { error: (e as Error).message };
+  }
+});
+
+// Copy a user-chosen image into the book's assets/ directory and return a path
+// relative to the book root (e.g. "assets/photo.png") for embedding.
+ipcMain.handle("folio:importImageAsset", async () => {
+  const bp = requireBook();
+  const { canceled, filePaths } = await showOpenDialog({
+    title: "Insert image",
+    properties: ["openFile"],
+    filters: [
+      { name: "Images", extensions: ["png", "jpg", "jpeg", "gif", "webp", "svg", "bmp"] },
+    ],
+  });
+  if (canceled || !filePaths.length) return { canceled: true } as const;
+  const src = filePaths[0];
+  const dir = path.join(bp, "assets");
+  fs.mkdirSync(dir, { recursive: true });
+  const base = path.basename(src);
+  const ext = path.extname(base);
+  const stem = path.basename(base, ext);
+  let name = base;
+  let counter = 2;
+  while (fs.existsSync(path.join(dir, name))) {
+    name = `${stem}-${counter}${ext}`;
+    counter += 1;
+  }
+  fs.copyFileSync(src, path.join(dir, name));
+  const relPath = `assets/${name}`;
+  return { ok: true, name, relPath };
+});
+
 ipcMain.handle("folio:copyText", (_e, text: string) => {
   clipboard.writeText(typeof text === "string" ? text : "");
   return { ok: true };
@@ -431,6 +502,30 @@ ipcMain.handle("folio:getClipboardText", () => {
   return clipboard.readText();
 });
 
+// Full screen is driven by the Electron window (not the DOM Fullscreen API,
+// which is unreliable inside Electron and fails silently here).
+ipcMain.handle("folio:toggleFullscreen", () => {
+  const win = getWindow();
+  if (!win) return false;
+  win.setFullScreen(!win.isFullScreen());
+  return win.isFullScreen();
+});
+
+// Right-click context menu (Electron has none by default), so Cut/Copy/Paste
+// via the mouse work. The roles act on whatever element is focused.
+ipcMain.on("folio:context-menu", (event, x: number, y: number) => {
+  const win = BrowserWindow.fromWebContents(event.sender);
+  if (!win) return;
+  const menu = Menu.buildFromTemplate([
+    { role: "cut" },
+    { role: "copy" },
+    { role: "paste" },
+    { type: "separator" },
+    { role: "selectAll" },
+  ]);
+  menu.popup({ window: win, x, y });
+});
+
 // Theme preference. Stored as a plain string so future themes can be added
 // without touching the main process. "default" from older builds maps to
 // "light" in the renderer, so it is normalized here too.

src/main/markdown-to-native.ts

@@ -0,0 +1,566 @@
+// Convert legacy Markdown chapter content into the native Folio document model.
+//
+// The converter reuses the SAME markdown-it rules Folio already applies for
+// print/PDF rendering (Obsidian ==highlight==, > [!callout], and [[wikilinks]])
+// so migrated content matches what the writer already sees in exports. A small
+// strikethrough rule is added for ~~text~~ (markdown-it has no built-in).
+//
+// The output is a ProseMirror/Tiptap JSON tree (FolioChapterDoc). It deliberately
+// does NOT produce any Markdown; the document is the source of truth.
+
+import MarkdownIt from "markdown-it";
+import type {
+  MarkdownIt as MarkdownItInstance,
+  StateCore,
+  StateInline,
+  Token,
+} from "markdown-it";
+import { wikilinkPlugin, type WikilinkTarget } from "../renderer/wikilinks.js";
+import {
+  CURRENT_DOC_SCHEMA_VERSION,
+  type FolioChapterDoc,
+  type FolioMark,
+  type FolioNode,
+} from "./native-doc.js";
+
+// ---------------------------------------------------------------------------
+// Inline markdown-it plugins (mirrors src/renderer/print-format.ts so that
+// ==highlight==, > [!callout] and [[wikilinks]] survive the migration exactly
+// as they render today). Kept local to avoid pulling renderer DOM code into the
+// main process.
+// ---------------------------------------------------------------------------
+
+// ==text== -> <mark>text</mark>
+function highlightPlugin(md: MarkdownItInstance) {
+  const parse = (state: StateInline, silent: boolean): boolean => {
+    const src = state.src;
+    const max = state.posMax;
+    const start = state.pos;
+    if (start + 2 > max) return false;
+    if (src.charCodeAt(start) !== 0x3d /* = */ || src.charCodeAt(start + 1) !== 0x3d)
+      return false;
+    let end = -1;
+    for (let i = start + 2; i < max - 1; i++) {
+      const ch = src.charCodeAt(i);
+      if (ch === 0x0a /* newline */) return false;
+      if (ch === 0x3d && src.charCodeAt(i + 1) === 0x3d) {
+        end = i;
+        break;
+      }
+    }
+    if (end === -1) return false;
+    const content = src.slice(start + 2, end);
+    if (!content.trim()) return false;
+    if (silent) {
+      state.pos = end + 2;
+      return true;
+    }
+    state.push("highlight_open", "mark", 1);
+    state.push("text", "", 0).content = content;
+    state.push("highlight_close", "mark", -1);
+    state.pos = end + 2;
+    return true;
+  };
+  md.inline.ruler.before("emphasis", "highlight", parse);
+  md.renderer.rules.highlight_open = () => "<mark>";
+  md.renderer.rules.highlight_close = () => "</mark>";
+}
+
+// ~~text~~ -> <s>text</s>
+function strikethroughPlugin(md: MarkdownItInstance) {
+  const parse = (state: StateInline, silent: boolean): boolean => {
+    const src = state.src;
+    const max = state.posMax;
+    const start = state.pos;
+    if (start + 2 > max) return false;
+    if (src.charCodeAt(start) !== 0x7e /* ~ */ || src.charCodeAt(start + 1) !== 0x7e)
+      return false;
+    let end = -1;
+    for (let i = start + 2; i < max - 1; i++) {
+      const ch = src.charCodeAt(i);
+      if (ch === 0x0a /* newline */) return false;
+      if (ch === 0x7e && src.charCodeAt(i + 1) === 0x7e) {
+        end = i;
+        break;
+      }
+    }
+    if (end === -1) return false;
+    const content = src.slice(start + 2, end);
+    if (!content.trim()) return false;
+    if (silent) {
+      state.pos = end + 2;
+      return true;
+    }
+    state.push("s_open", "s", 1);
+    state.push("text", "", 0).content = content;
+    state.push("s_close", "s", -1);
+    state.pos = end + 2;
+    return true;
+  };
+  md.inline.ruler.before("emphasis", "strikethrough", parse);
+}
+
+const CALLOUT_RE = /^\s*\[!([a-zA-Z0-9_-]+)\]\s*(.*)$/;
+
+// > [!note] Title followed by "> body" lines becomes a styled callout. Runs
+// after inline parsing so the blockquote paragraph already has children.
+function calloutPlugin(md: MarkdownItInstance) {
+  md.core.ruler.after("inline", "callout", (state: StateCore) => {
+    const tokens = state.tokens;
+    for (let i = 0; i < tokens.length; i++) {
+      const open = tokens[i];
+      if (open.type !== "blockquote_open") continue;
+      let depth = 1;
+      let closeIdx = -1;
+      for (let j = i + 1; j < tokens.length; j++) {
+        const t = tokens[j];
+        if (t.type === "blockquote_open") depth += 1;
+        else if (t.type === "blockquote_close") {
+          depth -= 1;
+          if (depth === 0) {
+            closeIdx = j;
+            break;
+          }
+        }
+      }
+      if (closeIdx === -1) continue;
+      const paraOpen = tokens[i + 1];
+      if (!paraOpen || paraOpen.type !== "paragraph_open") continue;
+      const inline = tokens[i + 2];
+      if (!inline || inline.type !== "inline" || !inline.children) continue;
+      const first = inline.children[0];
+      if (!first || first.type !== "text") continue;
+      const m = CALLOUT_RE.exec(first.content);
+      if (!m) continue;
+
+      const calloutType = m[1].toLowerCase();
+      const title = m[2].trim();
+
+      open.type = "callout_open";
+      open.tag = "div";
+      open.attrs = [["class", `callout callout-${calloutType}`]];
+      const close = tokens[closeIdx];
+      close.type = "callout_close";
+      close.tag = "div";
+
+      first.content = "";
+      inline.children = inline.children.filter(
+        (c) => !(c.type === "text" && c.content === "")
+      );
+      if (inline.children[0]?.type === "softbreak") inline.children.shift();
+
+      if (title) {
+        const titleOpen = new state.Token("paragraph_open", "p", 1);
+        titleOpen.attrs = [["class", "callout-title"]];
+        const titleInline = new state.Token("inline", "", 0);
+        titleInline.content = title;
+        const titleText = new state.Token("text", "", 0);
+        titleText.content = title;
+        titleInline.children = [titleText];
+        const titleClose = new state.Token("paragraph_close", "p", -1);
+        tokens.splice(i + 1, 0, titleOpen, titleInline, titleClose);
+      }
+    }
+  });
+}
+
+function makeMd(targets: WikilinkTarget[]): MarkdownItInstance {
+  const md = new MarkdownIt({ html: true, linkify: true });
+  md.use(wikilinkPlugin, { chapters: targets });
+  md.use(strikethroughPlugin);
+  md.use(highlightPlugin);
+  md.use(calloutPlugin);
+  return md;
+}
+
+// ---------------------------------------------------------------------------
+// Token walking
+// ---------------------------------------------------------------------------
+
+export interface MarkdownToNativeOpts {
+  // Resolve an image source (relative paths can be copied into assets/).
+  resolveImage?: (src: string) => string;
+  // Chapter targets so [[wikilinks]] resolve to folio:chapter/<id>.
+  targets?: WikilinkTarget[];
+}
+
+interface WalkState {
+  resolveImage?: (src: string) => string;
+}
+
+function calloutType(token: Token): string {
+  const cls = String(token.attrGet("class") ?? "");
+  const m = /callout-([a-zA-Z0-9_-]+)/.exec(cls);
+  return m ? m[1] : "note";
+}
+
+// Convert a markdown-it token's attrs (array of [key, value]) into a plain
+// object so node-level attributes (e.g. the callout-title paragraph class)
+// survive into the native document.
+function tokenAttrObj(token: Token): Record<string, string> {
+  const a = token.attrs;
+  if (!a) return {};
+  const out: Record<string, string> = {};
+  for (const [k, v] of a) out[k] = String(v);
+  return out;
+}
+
+function mergeText(nodes: FolioNode[]): FolioNode[] {
+  const sig = (marks?: FolioMark[]) => JSON.stringify(marks ?? []);
+  const out: FolioNode[] = [];
+  for (const n of nodes) {
+    const prev = out[out.length - 1];
+    if (
+      n.type === "text" &&
+      prev &&
+      prev.type === "text" &&
+      sig(prev.marks) === sig(n.marks)
+    ) {
+      prev.text = (prev.text ?? "") + (n.text ?? "");
+    } else {
+      out.push(n);
+    }
+  }
+  return out;
+}
+
+function walkInline(children: Token[] | null, state: WalkState): FolioNode[] {
+  const out: FolioNode[] = [];
+  const markStack: FolioMark[] = [];
+  const topMarks = () => markStack.slice();
+
+  if (!children) return out;
+
+  for (const t of children) {
+    switch (t.type) {
+      case "text":
+        out.push({ type: "text", text: t.content, marks: topMarks() });
+        break;
+      case "softbreak":
+        out.push({ type: "text", text: " ", marks: topMarks() });
+        break;
+      case "hardbreak":
+        out.push({ type: "hard_break" });
+        break;
+      case "code_inline":
+        out.push({
+          type: "text",
+          text: t.content,
+          marks: [...topMarks(), { type: "code" }],
+        });
+        break;
+      case "strong_open":
+        markStack.push({ type: "bold" });
+        break;
+      case "strong_close":
+        markStack.pop();
+        break;
+      case "em_open":
+        markStack.push({ type: "italic" });
+        break;
+      case "em_close":
+        markStack.pop();
+        break;
+      case "s_open":
+        markStack.push({ type: "strike" });
+        break;
+      case "s_close":
+        markStack.pop();
+        break;
+      case "highlight_open":
+        markStack.push({ type: "highlight" });
+        break;
+      case "highlight_close":
+        markStack.pop();
+        break;
+      case "underline_open":
+        markStack.push({ type: "underline" });
+        break;
+      case "underline_close":
+        markStack.pop();
+        break;
+      case "link_open": {
+        const href = String(t.attrGet("href") ?? "");
+        const title = String(t.attrGet("title") ?? "");
+        const attrs: Record<string, unknown> = { href };
+        if (title) attrs.title = title;
+        markStack.push({ type: "link", attrs });
+        break;
+      }
+      case "link_close":
+        markStack.pop();
+        break;
+      case "image": {
+        let src = String(t.attrGet("src") ?? "");
+        if (state.resolveImage) src = state.resolveImage(src);
+        out.push({
+          type: "image",
+          attrs: {
+            src,
+            alt: String(t.content ?? ""),
+            title: String(t.attrGet("title") ?? ""),
+          },
+        });
+        break;
+      }
+      case "html_inline": {
+        const c = t.content;
+        if (c === "<u>") markStack.push({ type: "underline" });
+        else if (c === "</u>") markStack.pop();
+        else if (c === "</span>") markStack.pop();
+        else {
+          const open = /^<span([^>]*)>$/i.exec(c);
+          if (open) {
+            const style = /style\s*=\s*"([^"]*)"/i.exec(open[1]);
+            if (style) {
+              for (const decl of style[1].split(";")) {
+                const idx = decl.indexOf(":");
+                if (idx < 0) continue;
+                const prop = decl.slice(0, idx).trim().toLowerCase();
+                const val = decl.slice(idx + 1).trim();
+                if (!val) continue;
+                if (prop === "color")
+                  markStack.push({ type: "textColor", attrs: { color: val } });
+                else if (prop === "background" || prop === "background-color")
+                  markStack.push({ type: "highlight", attrs: { color: val } });
+              }
+            }
+          }
+        }
+        break;
+      }
+      default:
+        break;
+    }
+  }
+  return mergeText(out);
+}
+
+function collectUntil(
+  tokens: Token[],
+  openIdx: number,
+  openType: string,
+  closeType: string
+): number {
+  let depth = 1;
+  let close = -1;
+  for (let j = openIdx + 1; j < tokens.length; j++) {
+    if (tokens[j].type === openType) depth += 1;
+    else if (tokens[j].type === closeType) {
+      depth -= 1;
+      if (depth === 0) {
+        close = j;
+        break;
+      }
+    }
+  }
+  return close;
+}
+
+function firstTextNode(node: FolioNode): FolioNode | null {
+  for (const c of node.content ?? []) {
+    if (c.type === "text") return c;
+    if (c.content) {
+      const r = firstTextNode(c);
+      if (r) return r;
+    }
+  }
+  return null;
+}
+
+// Strip a leading "[ ] " / "[x] " checkbox from a list item, returns checked.
+function extractCheckbox(item: FolioNode): boolean {
+  const tn = firstTextNode(item);
+  if (tn && tn.text) {
+    const m = /^\[([ xX])\]\s?/.exec(tn.text);
+    if (m) {
+      tn.text = tn.text.slice(m[0].length);
+      return m[1].toLowerCase() === "x";
+    }
+  }
+  return false;
+}
+
+function walkBlocks(
+  tokens: Token[],
+  start: number,
+  end: number,
+  state: WalkState
+): FolioNode[] {
+  const out: FolioNode[] = [];
+  let i = start;
+  while (i < end) {
+    const t = tokens[i];
+    switch (t.type) {
+      case "heading_open": {
+        const level = parseInt(t.tag.slice(1), 10) || 1;
+        const inline = tokens[i + 1];
+        const content = inline?.children
+          ? walkInline(inline.children, state)
+          : [];
+        out.push({ type: "heading", attrs: { level }, content });
+        i += 3;
+        break;
+      }
+      case "paragraph_open": {
+        const inline = tokens[i + 1];
+        const content = inline?.children
+          ? walkInline(inline.children, state)
+          : [];
+        const attrs = tokenAttrObj(t);
+        out.push({
+          type: "paragraph",
+          ...(Object.keys(attrs).length ? { attrs } : {}),
+          content,
+        });
+        i += 3;
+        break;
+      }
+      case "bullet_list_open":
+      case "ordered_list_open": {
+        const [node, next] = walkList(tokens, i, state);
+        out.push(node);
+        i = next + 1;
+        break;
+      }
+      case "blockquote_open": {
+        const close = collectUntil(tokens, i, "blockquote_open", "blockquote_close");
+        const content = walkBlocks(tokens, i + 1, close, state);
+        out.push({ type: "blockquote", content });
+        i = close + 1;
+        break;
+      }
+      case "callout_open": {
+        const type = calloutType(t);
+        const close = collectUntil(tokens, i, "callout_open", "callout_close");
+        const content = walkBlocks(tokens, i + 1, close, state);
+        out.push({ type: "blockquote", attrs: { callout: type }, content });
+        i = close + 1;
+        break;
+      }
+      case "fence":
+      case "code_block": {
+        const lang = (String(t.info ?? "").trim()) || null;
+        out.push({
+          type: "codeBlock",
+          attrs: { language: lang },
+          content: [{ type: "text", text: t.content }],
+        });
+        i += 1;
+        break;
+      }
+      case "hr":
+        out.push({ type: "horizontalRule" });
+        i += 1;
+        break;
+      case "table_open": {
+        const [node, next] = walkTable(tokens, i, state);
+        out.push(node);
+        i = next + 1;
+        break;
+      }
+      case "html_block":
+        i += 1;
+        break;
+      default:
+        i += 1;
+        break;
+    }
+  }
+  return out;
+}
+
+function walkList(tokens: Token[], i: number, state: WalkState): [FolioNode, number] {
+  const open = tokens[i];
+  const isOrdered = open.type === "ordered_list_open";
+  const closeType = isOrdered ? "ordered_list_close" : "bullet_list_close";
+  const closeIdx = collectUntil(tokens, i, open.type, closeType);
+
+  const items: FolioNode[] = [];
+  let j = i + 1;
+  while (j < closeIdx) {
+    if (tokens[j].type === "list_item_open") {
+      const itemClose = collectUntil(tokens, j, "list_item_open", "list_item_close");
+      const content = walkBlocks(tokens, j + 1, itemClose, state);
+      items.push({ type: "listItem", content });
+      j = itemClose + 1;
+    } else {
+      j += 1;
+    }
+  }
+
+  // Obsidian-style checklists: "- [ ] " / "- [x] " in a bullet list.
+  let isTask = false;
+  if (!isOrdered && items[0]) {
+    const tn = firstTextNode(items[0]);
+    isTask = !!tn && /^\[([ xX])\]/.test(tn.text ?? "");
+  }
+
+  if (isTask) {
+    const taskItems = items.map((it) => ({
+      type: "taskItem",
+      attrs: { checked: extractCheckbox(it) },
+      content: it.content,
+    }));
+    return [{ type: "taskList", content: taskItems }, closeIdx];
+  }
+
+  const listType = isOrdered ? "orderedList" : "bulletList";
+  return [{ type: listType, content: items }, closeIdx];
+}
+
+function walkTable(tokens: Token[], i: number, state: WalkState): [FolioNode, number] {
+  const closeIdx = collectUntil(tokens, i, "table_open", "table_close");
+  const rows: FolioNode[] = [];
+  let j = i + 1;
+  while (j < closeIdx) {
+    const t = tokens[j];
+    if (t.type === "tr_open") {
+      const rc = collectUntil(tokens, j, "tr_open", "tr_close");
+      const cells: FolioNode[] = [];
+      let c = j + 1;
+      while (c < rc) {
+        if (tokens[c].type === "th_open" || tokens[c].type === "td_open") {
+          const cellOpen = tokens[c].type;
+          const cellClose = cellOpen === "th_open" ? "th_close" : "td_close";
+          const cellType = cellOpen === "th_open" ? "tableHeader" : "tableCell";
+          const cc = collectUntil(tokens, c, cellOpen, cellClose);
+          // Table cell content is an inline token (not wrapped in a paragraph
+          // block), so walk the inline children directly.
+          let inner: FolioNode[] = [];
+          for (let k = c + 1; k < cc; k++) {
+            if (tokens[k].type === "inline") {
+              inner = walkInline(tokens[k].children, state);
+              break;
+            }
+          }
+          cells.push({
+            type: cellType,
+            content: inner.length
+              ? [{ type: "paragraph", content: inner }]
+              : [{ type: "paragraph", content: [] }],
+          });
+          c = cc + 1;
+        } else {
+          c += 1;
+        }
+      }
+      rows.push({ type: "tableRow", content: cells });
+      j = rc + 1;
+    } else {
+      j += 1;
+    }
+  }
+  return [{ type: "table", content: rows }, closeIdx];
+}
+
+export function markdownToNative(source: string, opts: MarkdownToNativeOpts = {}): FolioChapterDoc {
+  const md = makeMd(opts.targets ?? []);
+  const tokens = md.parse(source, {});
+  const state: WalkState = { resolveImage: opts.resolveImage };
+  const blocks = walkBlocks(tokens, 0, tokens.length, state);
+  return {
+    schemaVersion: CURRENT_DOC_SCHEMA_VERSION,
+    doc: { type: "doc", content: blocks },
+  };
+}

src/main/menu.ts

@@ -30,6 +30,13 @@ export function buildMenu(
        { label: "New Book", accelerator: "CmdOrCtrl+N", click: onRequestNew },
        { label: "Open Book", accelerator: "CmdOrCtrl+O", click: onRequestOpen },
        { type: "separator" },
+       {
+         label: "Save",
+         accelerator: "CmdOrCtrl+S",
+         enabled: !!getState().bookPath,
+         click: () => getWindow()?.webContents.send("folio:save-requested"),
+       },
+       { type: "separator" },
       { label: "Open Recent", submenu: recentItems },
       { type: "separator" },
       {

src/main/migration.ts

@@ -0,0 +1,142 @@
+// Migration from legacy Markdown books to the native Folio document model.
+//
+// Strategy (safe + explicit, never automatic on open):
+//   - Only runs when the caller explicitly migrates a chapter/book.
+//   - Before touching anything, a full recovery backup of the book is made to
+//     ~/Folio-Recovery (see backup.ts). The original .md files are NEVER
+//     modified or deleted.
+//   - The .md content is parsed into a native FolioChapterDoc and written to a
+//     NEW chapters/<id>.json file. The folio.json entry is repointed to it.
+//   - Migration is idempotent: if a chapter already has a native .json file it
+//     is left untouched and reported as already-native.
+
+import fs from "fs";
+import path from "path";
+import {
+  loadBook,
+  saveMeta,
+  chaptersDir,
+  type BookMeta,
+} from "./project.js";
+import { getChapterContent } from "./chapters.js";
+import {
+  getChapterDoc,
+  setChapterDoc,
+  nativeChapterFile,
+  CURRENT_DOC_SCHEMA_VERSION,
+  type FolioChapterDoc,
+} from "./native-doc.js";
+import { markdownToNative } from "./markdown-to-native.js";
+import { ensureRecoveryBackup } from "./backup.js";
+
+export type MigrateStatus = "migrated" | "already-native" | "error";
+
+export interface MigrateResult {
+  status: MigrateStatus;
+  id: string;
+  file?: string;
+  error?: string;
+}
+
+// Resolve an image src for migration: external/data URIs are kept as-is;
+// local relative paths are copied into the book's assets/ directory and the
+// reference is rewritten to "assets/<name>".
+function resolveImageSrc(
+  src: string,
+  bookPath: string,
+  assetsDir: string,
+  chapterId: string
+): string {
+  if (/^(https?:|data:|blob:)/i.test(src)) return src;
+  const candidate = path.resolve(bookPath, src);
+  let exists = false;
+  try {
+    exists = fs.existsSync(candidate) && fs.statSync(candidate).isFile();
+  } catch {
+    exists = false;
+  }
+  if (!exists) return src; // best-effort: keep the original reference
+  fs.mkdirSync(assetsDir, { recursive: true });
+  const base = path.basename(src);
+  let name = `${chapterId}-${base}`.replace(/[^a-zA-Z0-9._-]/g, "_");
+  let dest = path.join(assetsDir, name);
+  let n = 2;
+  while (fs.existsSync(dest)) {
+    name = `${chapterId}-${n}-${base}`.replace(/[^a-zA-Z0-9._-]/g, "_");
+    dest = path.join(assetsDir, name);
+    n += 1;
+  }
+  fs.copyFileSync(candidate, dest);
+  return `assets/${name}`;
+}
+
+export function migrateChapterToNative(
+  bookPath: string,
+  id: string
+): MigrateResult {
+  try {
+    const meta = loadBook(bookPath);
+    const entry = meta.chapters[id];
+    if (!entry) return { status: "error", id, error: "Chapter not found" };
+
+    // Idempotency: already a native chapter -> leave the original .md alone.
+    if (entry.file.endsWith(".json")) {
+      meta.docFormat = "folio-doc";
+      meta.docSchemaVersion = CURRENT_DOC_SCHEMA_VERSION;
+      saveMeta(bookPath, meta);
+      return { status: "already-native", id, file: entry.file };
+    }
+
+    ensureRecoveryBackup(bookPath);
+
+    const md = getChapterContent(bookPath, id);
+    const assetsDir = path.join(bookPath, "assets");
+    const targets = Object.values(meta.chapters).map((c) => ({
+      id: c.id,
+      title: c.title,
+    }));
+    const doc: FolioChapterDoc = markdownToNative(md, {
+      resolveImage: (src) => resolveImageSrc(src, bookPath, assetsDir, id),
+      targets,
+    });
+
+    const newFile = path.posix.join("chapters", nativeChapterFile(id));
+    fs.mkdirSync(chaptersDir(bookPath), { recursive: true });
+    setChapterDoc(bookPath, id, doc);
+
+    entry.file = newFile;
+    meta.docFormat = "folio-doc";
+    meta.docSchemaVersion = CURRENT_DOC_SCHEMA_VERSION;
+    saveMeta(bookPath, meta);
+
+    return { status: "migrated", id, file: newFile };
+  } catch (err) {
+    return {
+      status: "error",
+      id,
+      error: err instanceof Error ? err.message : String(err),
+    };
+  }
+}
+
+export function migrateBookToNative(bookPath: string): MigrateResult[] {
+  ensureRecoveryBackup(bookPath);
+  const meta = loadBook(bookPath);
+  return meta.chapterOrder.map((id) => migrateChapterToNative(bookPath, id));
+}
+
+// Convenience: verify a migrated chapter reads back as valid native content.
+export function isNativeChapter(
+  bookPath: string,
+  id: string
+): boolean {
+  const meta = loadBook(bookPath) as BookMeta;
+  const entry = meta.chapters[id];
+  if (!entry || !entry.file.endsWith(".json")) return false;
+  try {
+    getChapterDoc(bookPath, id);
+    return true;
+  } catch {
+    return false;
+  }
+}

src/main/native-doc.ts

@@ -0,0 +1,127 @@
+// Native Folio rich-text document model.
+//
+// This is the single source of truth for chapter content once a book is
+// migrated to the native format. The document is a ProseMirror/Tiptap JSON
+// tree, not Markdown. See Stage 2 of the rich-text migration plan.
+//
+// Persistence layout (per book):
+//   folio.json          -> book metadata (chapterOrder, chapters, docFormat, ...)
+//   chapters/<id>.json  -> { schemaVersion, doc }  (native content)
+//   assets/             -> copied image assets referenced by chapters
+//
+// Markdown remains only for legacy migration (this module does the parsing)
+// and optional export (added later).
+
+import fs from "fs";
+import path from "path";
+import {
+  loadBook,
+  saveMeta,
+  chaptersDir,
+} from "./project.js";
+
+export interface FolioMark {
+  type: string;
+  attrs?: Record<string, unknown>;
+}
+
+export interface FolioNode {
+  type: string;
+  attrs?: Record<string, unknown>;
+  content?: FolioNode[];
+  text?: string;
+  marks?: FolioMark[];
+}
+
+export interface FolioChapterDoc {
+  schemaVersion: number;
+  doc: FolioNode;
+}
+
+// Bump this whenever the native document shape needs a one-way migration.
+export const CURRENT_DOC_SCHEMA_VERSION = 1;
+
+// Each entry migrates the document FROM its key version TO key+1.
+// Entries are additive and must be non-destructive.
+const MIGRATIONS: Record<number, (doc: FolioChapterDoc) => FolioChapterDoc> = {};
+
+// File name for a native chapter (replaces <id>.md).
+export function nativeChapterFile(id: string): string {
+  return `${id}.json`;
+}
+
+// Apply any pending schema migrations, always returning the current version.
+export function migrateDoc(doc: FolioChapterDoc): FolioChapterDoc {
+  let current = doc;
+  while (current.schemaVersion < CURRENT_DOC_SCHEMA_VERSION) {
+    const step = MIGRATIONS[current.schemaVersion];
+    if (!step) break;
+    current = step(current);
+  }
+  current.schemaVersion = CURRENT_DOC_SCHEMA_VERSION;
+  return current;
+}
+
+// Normalize legacy node type names on read. The editor's StarterKit historically
+// emitted Tiptap's default `hardBreak` (camelCase), while the converter/export
+// pipeline uses `hard_break` (snake_case). Rename so every consumer sees one
+// canonical name regardless of how the document was originally saved.
+function normalizeDocTypes(node: unknown): unknown {
+  if (!node || typeof node !== "object") return node;
+  const n = node as Record<string, any>;
+  if (typeof n.type === "string" && n.type === "hardBreak") n.type = "hard_break";
+  if (Array.isArray(n.content)) n.content = n.content.map((c) => normalizeDocTypes(c));
+  return n;
+}
+
+export function serializeChapter(doc: FolioChapterDoc): string {
+  return JSON.stringify(migrateDoc(doc), null, 2);
+}
+
+export function parseChapter(text: string): FolioChapterDoc {
+  let raw: unknown;
+  try {
+    raw = JSON.parse(text);
+  } catch {
+    throw new Error("Not a native Folio chapter document (invalid JSON).");
+  }
+  if (
+    !raw ||
+    typeof raw !== "object" ||
+    !("doc" in raw) ||
+    (raw as FolioChapterDoc).doc?.type !== "doc"
+  ) {
+    throw new Error("Not a native Folio chapter document (missing doc tree).");
+  }
+  const parsed = migrateDoc(raw as FolioChapterDoc);
+  normalizeDocTypes(parsed.doc);
+  return parsed;
+}
+
+// Read a native chapter document (throws if the chapter is not native JSON).
+export function getChapterDoc(bookPath: string, id: string): FolioChapterDoc {
+  const meta = loadBook(bookPath);
+  const entry = meta.chapters[id];
+  if (!entry) throw new Error("Chapter not found");
+  const file = path.join(bookPath, entry.file);
+  const raw = fs.readFileSync(file, "utf-8");
+  return parseChapter(raw);
+}
+
+// Write a native chapter document. Creates chapters/ if needed.
+export function setChapterDoc(
+  bookPath: string,
+  id: string,
+  doc: FolioChapterDoc
+): void {
+  fs.mkdirSync(chaptersDir(bookPath), { recursive: true });
+  const file = path.join(bookPath, "chapters", nativeChapterFile(id));
+  fs.writeFileSync(file, serializeChapter(doc), "utf-8");
+}
+
+// Validate that a parsed object is structurally a usable chapter document.
+export function isValidDoc(doc: FolioChapterDoc): boolean {
+  return !!doc && doc.doc?.type === "doc" && Array.isArray(doc.doc.content);
+}
+
+export { loadBook, saveMeta };

src/main/native-to-markdown.ts

@@ -0,0 +1,190 @@
+// Serialize a native Folio document (ProseMirror/Tiptap JSON) back to Markdown.
+//
+// This module is the *bridge* that lets Stage 1 keep the existing CodeMirror
+// editor, the Full Book view, and the Markdown export working after a chapter
+// has been migrated to the native JSON format. It is the inverse of
+// markdown-to-native.ts. Stage 2 (Tiptap editor) removes this bridge entirely
+// because the editor will speak native JSON directly.
+//
+// The output is intentionally "good enough" Markdown that round-trips through
+// markdown-to-native.ts; it is NOT a pixel-perfect reconstruction of the
+// original source (e.g. raw control characters inside ==highlight== are kept
+// literal, and folio:chapter/<id> links become [[text]] wikilinks).
+
+import type {
+  FolioChapterDoc,
+  FolioMark,
+  FolioNode,
+} from "./native-doc.js";
+
+// Marks applied outermost-first so nested formatting renders as valid Markdown.
+const MARK_ORDER = [
+  "link",
+  "textColor",
+  "highlight",
+  "underline",
+  "strike",
+  "bold",
+  "italic",
+  "code",
+];
+
+function wrap(mark: FolioMark, text: string): string {
+  const attrs = mark.attrs ?? {};
+  switch (mark.type) {
+    case "bold":
+      return `**${text}**`;
+    case "italic":
+      return `*${text}*`;
+    case "strike":
+      return `~~${text}~~`;
+    case "code":
+      return "`" + text + "`";
+    case "underline":
+      return `<u>${text}</u>`;
+    case "highlight": {
+      const color = attrs.color;
+      return color
+        ? `<span style="background-color:${color}">${text}</span>`
+        : `==${text}==`;
+    }
+    case "textColor":
+      return `<span style="color:${attrs.color}">${text}</span>`;
+    case "link": {
+      const href = String(attrs.href ?? "");
+      if (href.startsWith("folio:chapter/")) return `[[${text}]]`;
+      const title = attrs.title ? ` "${attrs.title}"` : "";
+      return `[${text}](${href}${title})`;
+    }
+    default:
+      return text;
+  }
+}
+
+function applyMarks(text: string, marks: FolioMark[] = []): string {
+  let s = text;
+  for (const type of MARK_ORDER) {
+    const mark = marks.find((m) => m.type === type);
+    if (mark) s = wrap(mark, s);
+  }
+  return s;
+}
+
+function inlineToMd(nodes: FolioNode[] = []): string {
+  let out = "";
+  for (const n of nodes) {
+    if (n.type === "text") {
+      out += applyMarks(n.text ?? "", n.marks);
+    } else if (n.type === "hard_break" || n.type === "hardbreak") {
+      out += "\n";
+    } else if (n.type === "paragraph") {
+      out += inlineToMd(n.content);
+    } else if (n.type === "image") {
+      const { src, alt, title } = n.attrs ?? {};
+      out += title
+        ? `![${alt ?? ""}](${src} "${title}")`
+        : `![${alt ?? ""}](${src})`;
+    }
+  }
+  return out;
+}
+
+function listToMd(node: FolioNode, depth: number): string {
+  const indent = "  ".repeat(depth);
+  const ordered = node.type === "orderedList";
+  const isTask = node.type === "taskList";
+  const items = node.content ?? [];
+  return items
+    .map((item, i) => {
+      let marker: string;
+      if (isTask) marker = item.attrs?.checked ? "- [x] " : "- [ ] ";
+      else if (ordered) marker = `${i + 1}. `;
+      else marker = "- ";
+      const inner = (item.content ?? [])
+        .map((b) => blockToMd(b, depth + 1))
+        .join("\n\n");
+      const lines = inner.split("\n");
+      return (
+        indent +
+        marker +
+        lines
+          .map((l, idx) => (idx === 0 ? l : indent + "  " + l))
+          .join("\n")
+      );
+    })
+    .join("\n");
+}
+
+function tableToMd(node: FolioNode): string {
+  const rows = node.content ?? [];
+  if (!rows.length) return "";
+  const cellsOf = (row: FolioNode) =>
+    (row.content ?? []).map((c) => inlineToMd(c.content));
+  const header = cellsOf(rows[0]);
+  const sep = header.map(() => "---");
+  const body = rows.slice(1).map(cellsOf);
+  return [...[header, sep], ...body]
+    .map((r) => "| " + r.join(" | ") + " |")
+    .join("\n");
+}
+
+function blockToMd(node: FolioNode, depth = 0): string {
+  switch (node.type) {
+    case "paragraph":
+      return inlineToMd(node.content);
+    case "heading": {
+      const level = Number(node.attrs?.level ?? 1);
+      return "#".repeat(level) + " " + inlineToMd(node.content);
+    }
+    case "blockquote": {
+      if (node.attrs?.callout) {
+        const calloutType = String(node.attrs.callout);
+        const rest: FolioNode[] = [];
+        let title = "";
+        for (const c of node.content ?? []) {
+          if (c.type === "paragraph" && c.attrs?.class === "callout-title") {
+            title = inlineToMd(c.content);
+          } else {
+            rest.push(c);
+          }
+        }
+        const body = rest.map((b) => blockToMd(b, depth)).join("\n\n");
+        const lines = [`> [!${calloutType}]${title ? " " + title : ""}`];
+        if (body) {
+          for (const l of body.split("\n")) lines.push(l ? "> " + l : ">");
+        }
+        return lines.join("\n");
+      }
+      const inner = (node.content ?? [])
+        .map((b) => blockToMd(b, depth))
+        .join("\n\n");
+      return inner
+        .split("\n")
+        .map((l) => (l ? "> " + l : ">"))
+        .join("\n");
+    }
+    case "bulletList":
+    case "orderedList":
+    case "taskList":
+      return listToMd(node, depth);
+    case "codeBlock": {
+      const lang = node.attrs?.language ?? "";
+      const text = (node.content ?? [])
+        .map((c) => c.text ?? "")
+        .join("")
+        .replace(/\n+$/, "");
+      return "```" + lang + "\n" + text + "\n```";
+    }
+    case "horizontalRule":
+      return "---";
+    case "table":
+      return tableToMd(node);
+    default:
+      return "";
+  }
+}
+
+export function nativeToMarkdown(doc: FolioChapterDoc): string {
+  const blocks = doc.doc?.content ?? [];
+  return blocks.map((b) => blockToMd(b)).join("\n\n");
+}

src/main/preload.ts

@@ -8,6 +8,8 @@ contextBridge.exposeInMainWorld("folio", {
   revealInFolder: (p: string) => ipcRenderer.invoke("folio:reveal", p),
   getRecents: () => ipcRenderer.invoke("folio:getRecents"),
   closeBook: () => ipcRenderer.invoke("folio:closeBook"),
+  showContextMenu: (x: number, y: number) =>
+    ipcRenderer.send("folio:context-menu", x, y),
 
   // chapters
   getBookMeta: () => ipcRenderer.invoke("folio:getBookMeta"),
@@ -25,6 +27,14 @@ contextBridge.exposeInMainWorld("folio", {
     ipcRenderer.invoke("folio:reorderChapters", newOrder),
   saveChapter: (id: string, content: string) =>
     ipcRenderer.invoke("folio:saveChapter", id, content),
+  migrateChapter: (id: string) =>
+    ipcRenderer.invoke("folio:migrateChapter", id),
+  migrateBook: () => ipcRenderer.invoke("folio:migrateBook"),
+  loadChapterDoc: (id: string) =>
+    ipcRenderer.invoke("folio:loadChapterDoc", id),
+  saveChapterDoc: (id: string, doc: unknown) =>
+    ipcRenderer.invoke("folio:saveChapterDoc", id, doc),
+  importImageAsset: () => ipcRenderer.invoke("folio:importImageAsset"),
   exportMarkdown: () => ipcRenderer.invoke("folio:exportMarkdown"),
   exportZip: () => ipcRenderer.invoke("folio:exportZip"),
   exportPdf: () => ipcRenderer.invoke("folio:exportPdf"),
@@ -33,6 +43,7 @@ contextBridge.exposeInMainWorld("folio", {
   importAttachment: () => ipcRenderer.invoke("folio:importAttachment"),
   copyText: (text: string) => ipcRenderer.invoke("folio:copyText", text),
   getClipboardText: () => ipcRenderer.invoke("folio:getClipboardText"),
+  toggleFullscreen: () => ipcRenderer.invoke("folio:toggleFullscreen"),
 
   // theme preference
   getTheme: () => ipcRenderer.invoke("folio:getTheme"),
@@ -69,4 +80,6 @@ contextBridge.exposeInMainWorld("folio", {
     ipcRenderer.on("folio:redo-requested", () => cb()),
   onSelectAllRequested: (cb: () => void) =>
     ipcRenderer.on("folio:selectAll-requested", () => cb()),
+  onSaveRequested: (cb: () => void) =>
+    ipcRenderer.on("folio:save-requested", () => cb()),
 });

src/main/project.ts

@@ -13,6 +13,10 @@ export interface BookMeta {
   title: string;
   chapterOrder: string[];
   chapters: Record<string, ChapterEntry>;
+  // Native document format metadata (added when a book is migrated). Legacy
+  // Markdown books omit these fields entirely.
+  docFormat?: "markdown" | "folio-doc";
+  docSchemaVersion?: number;
 }
 
 export interface Recent {

src/main/recents.ts

@@ -16,10 +16,20 @@ export function recentsFilePath(): string {
 
 export function listRecents(): Recent[] {
   // Drop entries whose book no longer exists (e.g. e2e temp books).
-  const recents = _listRecents(recentsFilePath());
-  return recents.filter(
+  const recents = _listRecents(recentsFilePath()).filter(
     (r) => r && typeof r.path === "string" && hasBook(r.path)
   );
+  // Collapse repeats of the same book (same title) so the home/recent list
+  // is not cluttered with multiple temp copies of one book.
+  const seen = new Set<string>();
+  const deduped: Recent[] = [];
+  for (const r of recents) {
+    const key = (r.title || r.path).toLowerCase();
+    if (seen.has(key)) continue;
+    seen.add(key);
+    deduped.push(r);
+  }
+  return deduped;
 }
 
 export function addRecent(recent: Recent): Recent[] {

src/renderer/index.css

@@ -68,15 +68,16 @@ html, body {
 }
 
 .brand-icon {
-  width: 24px;
-  height: 24px;
+  width: 64px;
+  height: 64px;
   flex: none;
   object-fit: contain;
 }
 
 .sidebar-header .icon-button {
-  font-size: 1.1rem;
+  font-size: 2rem;
   font-weight: 700;
+  line-height: 1;
 }
 
 .sidebar-title {
@@ -290,6 +291,45 @@ html, body {
   border-color: var(--color-accent);
 }
 
+.icon-button:focus-visible {
+  outline: 2px solid var(--color-accent);
+  outline-offset: 1px;
+}
+
+.icon-button:active {
+  background: var(--color-accent);
+  color: var(--color-on-accent);
+  border-color: var(--color-accent);
+  transform: translateY(1px);
+}
+
+.icon-button:disabled {
+  opacity: 0.55;
+  cursor: default;
+  background: transparent;
+  color: inherit;
+  border-color: var(--color-border);
+  transform: none;
+}
+
+.icon-button.active {
+  background: var(--color-accent);
+  color: var(--color-on-accent);
+  border-color: var(--color-accent);
+}
+
+/* The chapters "+" must stay clearly visible (white) in dark mode. */
+:root[data-theme="dark-mode"] #addChapterBtn {
+  color: #ffffff;
+}
+
+/* The brand logo is a dark glyph; on the near-black dark theme it would be
+   invisible. Render it white there (light theme keeps the dark logo). */
+:root[data-theme="dark-mode"] .brand-icon,
+:root[data-theme="dark-mode"] .welcome-brand {
+  filter: brightness(0) invert(1);
+}
+
 /* ---- welcome ---- */
 .welcome {
   flex: 1;
@@ -304,8 +344,8 @@ html, body {
 }
 
 .welcome-brand {
-  width: 96px;
-  height: 96px;
+  width: 128px;
+  height: 128px;
   object-fit: contain;
   margin-bottom: 12px;
 }
@@ -377,6 +417,12 @@ html, body {
 }
 
 /* ---- chapter list ---- */
+body.dragging-active,
+body.dragging-active * {
+  cursor: grabbing !important;
+  user-select: none;
+}
+
 .chapter-row {
   display: flex;
   align-items: center;
@@ -571,20 +617,24 @@ html, body {
    the first gets a subtle separator where a printed page will begin. The
    separator is a pure CSS border on the chapter's first line, so it never
    becomes part of the copied chapter text. */
-#fullBookHost .cm-line.chapter-break {
+#fullBookHost .chapter-break {
   border-top: 1px solid var(--color-border);
   margin-top: 2.5rem;
   padding-top: 1.5rem;
 }
+#fullBookHost .chapter-break.first {
+  border-top: none;
+  margin-top: 0;
+  padding-top: 0;
+}
 
 /* ---- PDF / print output ----
    PDF export prints the whole window via webContents.printToPDF, so the
    print stylesheet replaces the entire app with a plain-HTML manuscript
    (#printBook) that the renderer keeps populated from the assembled book.
-   Printing plain HTML (instead of the CodeMirror editor, which only keeps a
-   virtualized window of lines in the DOM) guarantees the PDF always contains
-   the complete book in full, no matter how long it is or where the editor is
-   scrolled. #printBook is hidden on screen and shown only when printing. */
+   Printing plain HTML guarantees the PDF always contains the complete book in
+   full, no matter how long it is or where the editor is scrolled. #printBook
+   is hidden on screen and shown only when printing. */
 #printBook {
   display: none;
 }
@@ -812,6 +862,40 @@ html, body {
   border-color: var(--color-accent);
 }
 
+.toolbar-label {
+  font-family: var(--font-sans);
+  font-size: 0.72rem;
+  color: var(--color-text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  align-self: center;
+  padding: 0 2px;
+  user-select: none;
+}
+
+.toast {
+  position: fixed;
+  left: 50%;
+  bottom: 28px;
+  transform: translateX(-50%) translateY(8px);
+  background: var(--color-accent, #2f6df0);
+  color: #fff;
+  font-family: var(--font-sans);
+  font-size: 0.9rem;
+  font-weight: 600;
+  padding: 10px 18px;
+  border-radius: 8px;
+  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
+  opacity: 0;
+  pointer-events: none;
+  transition: opacity 0.18s ease, transform 0.18s ease;
+  z-index: 1000;
+}
+.toast.show {
+  opacity: 1;
+  transform: translateX(-50%) translateY(0);
+}
+
 /* ---- toolbar dropdowns ---- */
 .toolbar-dropdown {
   position: relative;
@@ -976,50 +1060,6 @@ body.focus-mode .editor {
   background: var(--color-bg);
 }
 
-.cm-editor {
-  flex: 1;
-  min-width: 0;
-  height: 100%;
-}
-
-.cm-editor .cm-scroller {
-  overflow: auto;
-}
-
-.cm-editor .cm-gutters {
-  background: var(--color-bg);
-  color: var(--color-muted);
-  border-right: 1px solid var(--color-border);
-}
-
-.cm-h1 { font-size: 1.7rem; font-weight: 700; }
-.cm-h2 { font-size: 1.45rem; font-weight: 700; }
-.cm-h3 { font-size: 1.25rem; font-weight: 600; }
-.cm-h4 { font-size: 1.1rem; font-weight: 600; }
-.cm-h5 { font-size: 1.05rem; font-weight: 600; }
-.cm-h6 { font-size: 1rem; font-weight: 600; color: var(--color-muted); }
-
-.cm-strong { font-weight: 700; }
-.cm-em { font-style: italic; }
-.cm-strike { text-decoration: line-through; }
-.cm-link { color: var(--color-accent); }
-.cm-url { color: var(--color-muted); text-decoration: underline; }
-.cm-code {
-  font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
-  background: var(--color-panel);
-  padding: 2px 6px;
-  border-radius: 4px;
-  font-size: 0.9em;
-}
-.cm-quote { color: var(--color-muted); }
-.cm-hr { color: var(--color-muted); text-decoration: line-through; }
-.cm-comment { color: var(--color-muted); }
-
-.cm-panels {
-  background: var(--color-panel);
-  color: var(--color-text);
-}
-
 /* ---- modal dialog ---- */
 .modal-backdrop {
   position: fixed;
@@ -1095,3 +1135,77 @@ body.focus-mode .editor {
   cursor: not-allowed;
 }
 
+
+/* ---- Native rich-text (Tiptap / ProseMirror) editor ---- */
+.editor-panes .folio-prose.ProseMirror {
+  height: 100%;
+  min-height: 100%;
+  overflow-y: auto;
+  font-family: var(--font-serif);
+  font-size: 1.05rem;
+  line-height: 1.7;
+  color: var(--color-text);
+  background: var(--color-bg);
+  padding: 24px 20px;
+  max-width: 820px;
+  margin: 0 auto;
+  outline: none;
+}
+
+.folio-prose :first-child { margin-top: 0; }
+.folio-prose h1 { font-size: 2rem; margin: 0.6em 0 0.3em; }
+.folio-prose h2 { font-size: 1.6rem; margin: 0.6em 0 0.3em; }
+.folio-prose h3 { font-size: 1.3rem; margin: 0.6em 0 0.3em; }
+.folio-prose h4 { font-size: 1.12rem; margin: 0.6em 0 0.3em; }
+.folio-prose h5 { font-size: 1rem; margin: 0.6em 0 0.3em; }
+.folio-prose h6 { font-size: 0.9rem; margin: 0.6em 0 0.3em; }
+.folio-prose p { margin: 0 0 0.8em; }
+.folio-prose ul, .folio-prose ol { padding-left: 1.4em; margin: 0 0 0.8em; }
+.folio-prose blockquote {
+  border-left: 3px solid var(--color-accent);
+  margin: 0 0 0.8em;
+  padding: 0.2em 0 0.2em 1em;
+  color: var(--color-text-dim);
+}
+.folio-prose code {
+  font-family: var(--font-mono);
+  background: var(--color-panel);
+  padding: 0.1em 0.35em;
+  border-radius: 4px;
+  font-size: 0.92em;
+}
+.folio-prose pre {
+  background: var(--color-panel);
+  border: 1px solid var(--color-border);
+  border-radius: 6px;
+  padding: 12px 14px;
+  overflow-x: auto;
+}
+.folio-prose pre code { background: none; padding: 0; }
+.folio-prose img { max-width: 100%; height: auto; border-radius: 4px; }
+.folio-prose a { color: var(--color-accent); text-decoration: underline; }
+.folio-prose hr { border: none; border-top: 1px solid var(--color-border); margin: 1.2em 0; }
+.folio-prose table {
+  border-collapse: collapse;
+  margin: 0 0 0.8em;
+  width: 100%;
+}
+.folio-prose th, .folio-prose td {
+  border: 1px solid var(--color-border);
+  padding: 6px 10px;
+  vertical-align: top;
+}
+.folio-prose th { background: var(--color-panel); font-weight: 600; }
+.folio-prose ul[data-type="taskList"] { list-style: none; padding-left: 0.4em; }
+.folio-prose ul[data-type="taskList"] li { display: flex; gap: 0.5em; align-items: flex-start; }
+.folio-prose ul[data-type="taskList"] li > label { margin-top: 0.25em; }
+.folio-prose ul[data-type="taskList"] input { margin: 0; }
+.folio-prose .selectedCell { background: rgba(127, 127, 127, 0.2); }
+.folio-prose .is-empty::before {
+  content: "Write something…";
+  color: var(--color-text-dim);
+  float: left;
+  height: 0;
+  pointer-events: none;
+}
+.folio-prose:focus { outline: none; }

src/renderer/index.html

@@ -18,6 +18,7 @@
           <button class="icon-button" id="addChapterBtn" title="Add chapter">+</button>
         </div>
         <div class="project-bar hidden" id="projectBar">
+          <button class="icon-button" id="homeBtn" title="Home" aria-label="Home">🏠</button>
           <span class="book-title" id="bookTitle"></span>
           <span class="book-path" id="bookPath" title=""></span>
           <button class="icon-button" id="revealBtn" title="Reveal in folder">📁</button>
@@ -31,7 +32,7 @@
             <label class="theme-label" for="themeSelect">Theme</label>
             <select id="themeSelect" class="theme-select" title="Interface theme">
               <option value="light">Light</option>
-              <option value="neonflux">Neonflux</option>
+              <option value="dark-mode">Dark Mode</option>
             </select>
           </div>
           <button class="button button-ghost" id="newChapterBtn">+ New Chapter</button>
@@ -84,6 +85,39 @@
                 <option value="5">Heading 5</option>
                 <option value="6">Heading 6</option>
               </select>
+                <select id="fontFamilySelect" class="toolbar-select" title="Font family">
+                  <option value="">Serif</option>
+                  <option value="DejaVu Serif, Liberation Serif, serif">DejaVu Serif</option>
+                  <option value="C059, Times New Roman, serif">C059</option>
+                  <option value="Bitstream Charter, serif">Bitstream Charter</option>
+                  <option value="IBM Plex Serif, serif">IBM Plex Serif</option>
+                  <option value="URW Bookman, DejaVu Serif, serif">Bookman</option>
+                  <option value="DejaVu Sans, Liberation Sans, sans-serif">DejaVu Sans</option>
+                  <option value="Carlito, DejaVu Sans, sans-serif">Carlito</option>
+                  <option value="IBM Plex Sans, DejaVu Sans, sans-serif">IBM Plex Sans</option>
+                  <option value="DejaVu Sans Mono, Liberation Mono, monospace">DejaVu Mono</option>
+                  <option value="IBM Plex Mono, DejaVu Sans Mono, monospace">IBM Plex Mono</option>
+                  <option value="FreeMono, monospace">FreeMono</option>
+                </select>
+                <select id="fontSizeSelect" class="toolbar-select" title="Font size">
+                  <option value="">17px</option>
+                  <option value="12px">12px</option>
+                  <option value="14px">14px</option>
+                  <option value="16px">16px</option>
+                  <option value="18px">18px</option>
+                  <option value="20px">20px</option>
+                  <option value="24px">24px</option>
+                  <option value="32px">32px</option>
+                </select>
+                <select id="lineSpacingSelect" class="toolbar-select" title="Line spacing">
+                  <option value="">1.7</option>
+                  <option value="1">1.0</option>
+                  <option value="1.15">1.15</option>
+                  <option value="1.5">1.5</option>
+                  <option value="2">2.0</option>
+                  <option value="2.5">2.5</option>
+                  <option value="3">3.0</option>
+                </select>
             </div>
             <div class="toolbar-group">
               <button class="toolbar-btn b" data-cmd="bold" title="Bold (Ctrl+B)">B</button>
@@ -191,6 +225,8 @@
                   <button class="dropdown-item" data-export="pdf">PDF</button>
                   <button class="dropdown-item" data-export="docx">DOCX</button>
                   <button class="dropdown-item" data-export="odt">ODT</button>
+                  <div class="dropdown-sep"></div>
+                  <button class="dropdown-item" data-export="native">Migrate to native</button>
                 </div>
               </div>
               <button class="button button-primary" id="copyAllBtn" title="Copy the entire assembled manuscript as Markdown">Copy All</button>
@@ -222,6 +258,7 @@
         </div>
       </div>
     </div>
+    <div class="toast hidden" id="toast"></div>
     <script src="./renderer.js"></script>
   </body>
 </html>

src/renderer/md-editor.ts

@@ -1,153 +0,0 @@
-import { EditorState, type Extension } from "@codemirror/state";
-import {
-  EditorView,
-  drawSelection,
-  dropCursor,
-  highlightActiveLine,
-  keymap,
-  type KeyBinding,
-} from "@codemirror/view";
-import { defaultKeymap, history, historyKeymap, indentWithTab } from "@codemirror/commands";
-import {
-  bracketMatching,
-  HighlightStyle,
-  indentOnInput,
-  syntaxHighlighting,
-} from "@codemirror/language";
-import { markdown } from "@codemirror/lang-markdown";
-import { highlightSelectionMatches, search, searchKeymap } from "@codemirror/search";
-import { tags } from "@lezer/highlight";
-import { toggleBold, toggleItalic, toggleLink, toggleStrikethrough, toggleUnderline } from "./md-format.js";
-
-export interface MdEditorCallbacks {
-  onChange: (text: string) => void;
-  onSelection?: (view: EditorView) => void;
-  readOnly?: boolean;
-  extensions?: Extension[];
-}
-
-const formatBindings: KeyBinding[] = [
-  { key: "Mod-b", run: toggleBold, preventDefault: true },
-  { key: "Mod-i", run: toggleItalic, preventDefault: true },
-  { key: "Mod-u", run: toggleUnderline, preventDefault: true },
-  { key: "Mod-Shift-s", run: toggleStrikethrough, preventDefault: true },
-  { key: "Mod-k", run: toggleLink, preventDefault: true },
-];
-
-const mdHighlight = HighlightStyle.define([
-  { tag: tags.heading1, class: "cm-h1" },
-  { tag: tags.heading2, class: "cm-h2" },
-  { tag: tags.heading3, class: "cm-h3" },
-  { tag: tags.heading4, class: "cm-h4" },
-  { tag: tags.heading5, class: "cm-h5" },
-  { tag: tags.heading6, class: "cm-h6" },
-  { tag: tags.strong, class: "cm-strong" },
-  { tag: tags.emphasis, class: "cm-em" },
-  { tag: tags.strikethrough, class: "cm-strike" },
-  { tag: tags.link, class: "cm-link" },
-  { tag: tags.url, class: "cm-url" },
-  { tag: tags.monospace, class: "cm-code" },
-  { tag: tags.quote, class: "cm-quote" },
-  { tag: tags.contentSeparator, class: "cm-hr" },
-  { tag: tags.comment, class: "cm-comment" },
-]);
-
-const folioTheme = EditorView.theme({
-  "&": {
-    height: "100%",
-    fontSize: "1.05rem",
-    backgroundColor: "var(--color-bg)",
-    color: "var(--color-text)",
-  },
-  "&.cm-focused": {
-    outline: "none",
-  },
-  ".cm-scroller": {
-    fontFamily: "var(--font-serif)",
-    lineHeight: "1.7",
-    padding: "24px 20px",
-  },
-  ".cm-content": {
-    caretColor: "var(--color-accent)",
-    maxWidth: "820px",
-    paddingBottom: "48px",
-  },
-  ".cm-cursor, .cm-dropCursor": {
-    borderLeftColor: "var(--color-accent)",
-  },
-  ".cm-selectionBackground, &.cm-focused .cm-selectionBackground": {
-    backgroundColor: "var(--color-accent)",
-    opacity: "0.25",
-  },
-  ".cm-activeLine": {
-    backgroundColor: "var(--color-panel)",
-  },
-  "&.cm-focused .cm-matchingBracket": {
-    outline: "1px solid var(--color-accent)",
-  },
-  ".cm-searchMatch": {
-    backgroundColor: "var(--color-selection)",
-  },
-  ".cm-searchMatch.cm-searchMatch-selected": {
-    backgroundColor: "var(--color-selection-strong)",
-  },
-  ".cm-panels": {
-    backgroundColor: "var(--color-panel)",
-    color: "var(--color-text)",
-    fontFamily: "var(--font-sans)",
-    fontSize: "0.85rem",
-  },
-  ".cm-panels input, .cm-panels button": {
-    fontFamily: "var(--font-sans)",
-  },
-});
-
-export function createMdEditor(host: HTMLElement, callbacks: MdEditorCallbacks): EditorView {
-  const readOnly = !!callbacks.readOnly;
-  const view = new EditorView({
-    state: EditorState.create({
-      doc: "",
-      extensions: [
-        EditorView.lineWrapping,
-        drawSelection(),
-        dropCursor(),
-        highlightActiveLine(),
-        highlightSelectionMatches(),
-        history(),
-        indentOnInput(),
-        bracketMatching(),
-        markdown(),
-        search({ top: true }),
-        syntaxHighlighting(mdHighlight),
-        folioTheme,
-        ...(callbacks.extensions ?? []),
-        ...(readOnly ? [EditorState.readOnly.of(true)] : []),
-        keymap.of(
-          readOnly
-            ? [...defaultKeymap, ...searchKeymap]
-            : [...formatBindings, ...defaultKeymap, ...historyKeymap, ...searchKeymap, indentWithTab]
-        ),
-        EditorView.updateListener.of((update) => {
-          if (update.docChanged) callbacks.onChange(update.state.doc.toString());
-          if (callbacks.onSelection && (update.docChanged || update.selectionSet)) {
-            callbacks.onSelection(update.view);
-          }
-        }),
-      ],
-    }),
-    parent: host,
-  });
-  return view;
-}
-
-export function setEditorText(view: EditorView, text: string): void {
-  const current = view.state.doc.toString();
-  if (current === text) return;
-  view.dispatch({
-    changes: { from: 0, to: view.state.doc.length, insert: text },
-  });
-}
-
-export function editorText(view: EditorView): string {
-  return view.state.doc.toString();
-}

src/renderer/md-format.ts

@@ -1,818 +0,0 @@
-import {
-  EditorSelection,
-  type EditorState,
-  type Transaction,
-  type TransactionSpec,
-} from "@codemirror/state";
-
-/**
- * Minimal command target: the functions in this module only need read access
- * to an editor state and a way to dispatch a transaction. Both `EditorView`
- * and a plain { state, dispatch } object satisfy it, which keeps the module
- * testable without a DOM.
- */
-export interface FormatTarget {
-  state: EditorState;
-  dispatch: (tr: Transaction | TransactionSpec) => void;
-}
-
-type FormatCommand = (target: FormatTarget) => boolean;
-
-function slice(state: EditorState, from: number, to: number): string {
-  return state.doc.sliceString(from, to);
-}
-
-function lineRange(state: EditorState, from: number, to: number): { start: number; end: number } {
-  const first = state.doc.lineAt(from);
-  const last = state.doc.lineAt(to);
-  return { start: first.from, end: last.to };
-}
-
-/* ------------------------------------------------------------------ */
-/* Inline markers: bold, italic, strikethrough, inline code            */
-/* ------------------------------------------------------------------ */
-
-function toggleInline(marker: string): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from, to } = state.selection.main;
-    const len = marker.length;
-    const single = len === 1;
-
-    const before = from - len >= 0 ? slice(state, from - len, from) : "";
-    const after = slice(state, to, to + len);
-    const isolatedBefore =
-      !single || from - len - 1 < 0 || slice(state, from - len - 1, from - len) !== marker;
-    const isolatedAfter =
-      !single || to + len >= state.doc.length || slice(state, to + len, to + len + 1) !== marker;
-
-    if (before === marker && after === marker && isolatedBefore && isolatedAfter) {
-      dispatch({
-        changes: [
-          { from: from - len, to: from, insert: "" },
-          { from: to, to: to + len, insert: "" },
-        ],
-        selection: EditorSelection.single(from - len, to - len),
-      });
-      return true;
-    }
-
-    const text = slice(state, from, to);
-    const textStartsMarked = text.startsWith(marker);
-    const textEndsMarked = text.endsWith(marker);
-    const isolatedInnerBefore =
-      !single || text.length < len * 2 + 1 || text.charAt(len) !== marker;
-    const isolatedInnerAfter =
-      !single || text.length < len * 2 + 1 || text.charAt(text.length - len - 1) !== marker;
-
-    if (
-      text.length >= len * 2 &&
-      textStartsMarked &&
-      textEndsMarked &&
-      isolatedInnerBefore &&
-      isolatedInnerAfter
-    ) {
-      dispatch({
-        changes: [
-          { from, to: from + len, insert: "" },
-          { from: to - len, to, insert: "" },
-        ],
-        selection: EditorSelection.single(from, to - len * 2),
-      });
-      return true;
-    }
-
-    dispatch({
-      changes: [
-        { from, to: from, insert: marker },
-        { from: to, to: to, insert: marker },
-      ],
-      selection: EditorSelection.single(from + len, to + len),
-    });
-    return true;
-  };
-}
-
-export const toggleBold: FormatCommand = toggleInline("**");
-export const toggleItalic: FormatCommand = toggleInline("*");
-export const toggleStrikethrough: FormatCommand = toggleInline("~~");
-export const toggleInlineCode: FormatCommand = toggleInline("`");
-
-/* ------------------------------------------------------------------ */
-/* Code: inline for single-line/empty selection, fenced for blocks     */
-/* ------------------------------------------------------------------ */
-
-const fenceLineRe = /^```[a-zA-Z0-9_-]*[ \t]*$/;
-
-export const toggleCode: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-  const first = state.doc.lineAt(from);
-  const last = state.doc.lineAt(to);
-
-  if (first.number === last.number) {
-    return toggleInlineCode(target);
-  }
-
-  let start = first.from;
-  let end = last.to;
-  let region = slice(state, start, end);
-  let lines = region.split("\n");
-
-  // Selection starts at an opening fence: treat it as a fenced-block toggle.
-  if (lines.length > 1 && fenceLineRe.test(lines[0])) {
-    if (!fenceLineRe.test(lines[lines.length - 1]) && last.number < state.doc.lines) {
-      const next = state.doc.line(last.number + 1);
-      if (fenceLineRe.test(next.text)) end = next.to;
-    }
-    region = slice(state, start, end);
-    lines = region.split("\n");
-    const body = lines.slice(1, lines.length > 1 && fenceLineRe.test(lines[lines.length - 1]) ? -1 : lines.length);
-    dispatch({ changes: { from: start, to: end, insert: body.join("\n") } });
-    return true;
-  }
-
-  dispatch({ changes: { from: start, to: end, insert: "```\n" + region + "\n```" } });
-  return true;
-};
-
-/* ------------------------------------------------------------------ */
-/* Links                                                               */
-/* ------------------------------------------------------------------ */
-
-export const toggleLink: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-
-  const text = slice(state, from, to);
-
-  // Selection is already a link → select its URL so the user can edit it.
-  const link = /^\[([^\]\n]*)\]\(([^)\n]*)\)$/.exec(text);
-  if (link) {
-    const urlFrom = from + 1 + link[1].length + 2;
-    dispatch({
-      selection: EditorSelection.range(urlFrom, urlFrom + link[2].length),
-      scrollIntoView: true,
-    });
-    return true;
-  }
-
-  if (from === to) {
-    const pos = from;
-    dispatch({
-      changes: { from: pos, to: pos, insert: "[](url)" },
-      selection: EditorSelection.cursor(pos + 1),
-    });
-    return true;
-  }
-
-  const urlStart = from + text.length + 3;
-  dispatch({
-    changes: { from, to, insert: `[${text}](url)` },
-    selection: EditorSelection.range(urlStart, urlStart + 3),
-  });
-  return true;
-};
-
-/* ------------------------------------------------------------------ */
-/* Headings                                                            */
-/* ------------------------------------------------------------------ */
-
-const headingRe = /^(#{1,6})[ \t]/;
-
-export function setHeading(level: number): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from } = state.selection.main;
-    const line = state.doc.lineAt(from);
-    const match = line.text.match(headingRe);
-    const existing = match ? match[1].length : 0;
-
-    if (level === 0) {
-      if (!existing) return false;
-      dispatch({ changes: { from: line.from, to: line.from + existing + 1, insert: "" } });
-      return true;
-    }
-    if (existing === level) return false;
-
-    const insert = "#".repeat(level) + " ";
-    dispatch({
-      changes: existing
-        ? { from: line.from, to: line.from + existing + 1, insert }
-        : { from: line.from, to: line.from, insert },
-    });
-    return true;
-  };
-}
-
-export function headingLevelAt(state: EditorState, pos: number): number {
-  const line = state.doc.lineAt(pos);
-  const match = line.text.match(headingRe);
-  return match ? match[1].length : 0;
-}
-
-/* ------------------------------------------------------------------ */
-/* Line prefixes: bullet list, blockquote                              */
-/* ------------------------------------------------------------------ */
-
-function toggleLinePrefix(prefix: string): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from, to } = state.selection.main;
-    const { start, end } = lineRange(state, from, to);
-    const lines = slice(state, start, end).split("\n");
-    if (!lines.length) return false;
-    const allHave = lines.every((line) => line.startsWith(prefix));
-    const insert = lines.map((line) => (allHave ? line.slice(prefix.length) : prefix + line)).join("\n");
-    dispatch({ changes: { from: start, to: end, insert } });
-    return true;
-  };
-}
-
-export const toggleBulletList: FormatCommand = toggleLinePrefix("- ");
-export const toggleBlockquote: FormatCommand = toggleLinePrefix("> ");
-
-/* ------------------------------------------------------------------ */
-/* Numbered list                                                       */
-/* ------------------------------------------------------------------ */
-
-const orderedRe = /^\d+\.\s+/;
-
-export const toggleOrderedList: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-  const { start, end } = lineRange(state, from, to);
-  const lines = slice(state, start, end).split("\n");
-  if (!lines.length) return false;
-  const allHave = lines.every((line) => orderedRe.test(line));
-  const insert = lines
-    .map((line, index) => {
-      const stripped = line.replace(orderedRe, "");
-      return allHave ? stripped : `${index + 1}. ${stripped}`;
-    })
-    .join("\n");
-  dispatch({ changes: { from: start, to: end, insert } });
-  return true;
-};
-
-/* ------------------------------------------------------------------ */
-/* Horizontal rule                                                     */
-/* ------------------------------------------------------------------ */
-
-export const insertHorizontalRule: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from } = state.selection.main;
-
-  if (from === 0) {
-    dispatch({
-      changes: { from: 0, to: 0, insert: "---\n\n" },
-      selection: EditorSelection.cursor(5),
-    });
-    return true;
-  }
-
-  const line = state.doc.lineAt(from);
-  if (line.from === from && line.text.length === 0) {
-    const hasNextLine =
-      line.to < state.doc.length && slice(state, line.to, line.to + 1) === "\n";
-    const insertAt = hasNextLine ? line.to + 1 : line.from;
-    dispatch({
-      changes: { from: insertAt, to: insertAt, insert: "---\n\n" },
-      selection: EditorSelection.cursor(insertAt + 5),
-    });
-    return true;
-  }
-
-  dispatch({
-    changes: { from, to: from, insert: "\n\n---\n\n" },
-    selection: EditorSelection.cursor(from + 6),
-  });
-  return true;
-};
-
-/* ------------------------------------------------------------------ */
-/* Clear formatting                                                    */
-/* ------------------------------------------------------------------ */
-
-function clearLine(line: string): string {
-  let out = line;
-  out = out.replace(/^#{1,6}[ \t]+/, "");
-  out = out.replace(/^>\s*/, "");
-  out = out.replace(/^[-*+]\s+/, "");
-  out = out.replace(/^\d+\.\s+/, "");
-  out = out.replace(/\[([^\]\n]+)\]\([^)\n]*\)/g, "$1");
-  out = out.replace(/\*\*|\*|~~|`|==/g, "");
-  out = out.replace(
-    /<u>|<\/u>|<mark[^>]*>|<\/mark>|<span[^>]*>|<\/span>|<div[^>]*>|<\/div>/g,
-    ""
-  );
-  return out;
-}
-
-export const clearFormatting: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-  const { start, end } = lineRange(state, from, to);
-  const region = slice(state, start, end);
-  const cleaned = region.split("\n").map(clearLine).join("\n");
-  if (cleaned === region) return false;
-  dispatch({ changes: { from: start, to: end, insert: cleaned } });
-  return true;
-};
-
-/* ------------------------------------------------------------------ */
-/* HTML inline wrappers: underline, colors (readable outside Folio)    */
-/* ------------------------------------------------------------------ */
-
-interface HtmlSpan {
-  from: number;
-  textFrom: number;
-  textTo: number;
-  to: number;
-}
-
-function htmlSpanAt(
-  state: EditorState,
-  pos: number,
-  openPrefix: string,
-  closeTag: string
-): HtmlSpan | null {
-  const before = state.doc.sliceString(0, pos);
-  const openIdx = before.lastIndexOf(openPrefix);
-  if (openIdx < 0) return null;
-  const gt = state.doc.sliceString(openIdx).indexOf(">");
-  if (gt < 0) return null;
-  const textFrom = openIdx + gt + 1;
-  const after = state.doc.sliceString(textFrom);
-  const closeIdx = after.indexOf(closeTag);
-  if (closeIdx < 0) return null;
-  const textTo = textFrom + closeIdx;
-  if (pos >= openIdx && pos <= textTo + closeTag.length) {
-    return { from: openIdx, textFrom, textTo, to: textTo + closeTag.length };
-  }
-  return null;
-}
-
-function hexFrom(tag: string): string | null {
-  const m = /color:\s*(#[0-9a-fA-F]{3,8}|[a-zA-Z]+)/.exec(tag);
-  return m ? m[1].toLowerCase() : null;
-}
-
-export const toggleUnderline: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-
-  // Selection bounded by the tags: unwrap.
-  if (
-    from - 3 >= 0 &&
-    slice(state, from - 3, from) === "<u>" &&
-    slice(state, to, to + 4) === "</u>"
-  ) {
-    dispatch({
-      changes: [
-        { from: from - 3, to: from, insert: "" },
-        { from: to, to: to + 4, insert: "" },
-      ],
-      selection: EditorSelection.single(from - 3, to - 3),
-    });
-    return true;
-  }
-
-  // Selection includes the tags: unwrap.
-  const text = slice(state, from, to);
-  if (text.startsWith("<u>") && text.endsWith("</u>")) {
-    dispatch({
-      changes: [
-        { from, to: from + 3, insert: "" },
-        { from: to - 4, to, insert: "" },
-      ],
-      selection: EditorSelection.single(from, to - 7),
-    });
-    return true;
-  }
-
-  // Cursor inside a wrapper: unwrap it.
-  const wrapper = htmlSpanAt(state, from, "<u>", "</u>");
-  if (wrapper && from === to) {
-    dispatch({
-      changes: [
-        { from: wrapper.from, to: wrapper.textFrom, insert: "" },
-        { from: wrapper.textTo, to: wrapper.to, insert: "" },
-      ],
-      selection: EditorSelection.cursor(wrapper.textFrom),
-    });
-    return true;
-  }
-
-  dispatch({
-    changes: [
-      { from, to: from, insert: "<u>" },
-      { from: to, to: to, insert: "</u>" },
-    ],
-    selection: EditorSelection.single(from + 3, to + 3),
-  });
-  return true;
-};
-
-// Obsidian-compatible highlight markers.
-export const toggleHighlight: FormatCommand = toggleInline("==");
-
-function wrapColored(kind: "color" | "bg", color: string): FormatCommand {
-  const attr = kind === "color" ? "color" : "background-color";
-  const open = `<span style="${attr}:${color}">`;
-  const close = "</span>";
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from, to } = state.selection.main;
-    const text = slice(state, from, to);
-
-    // Whole colored span selected: remove the color.
-    const re = new RegExp(`^<span style="${attr}:[^"]*">([\\s\\S]*)<\\/span>$`);
-    const full = re.exec(text);
-    if (full) {
-      const inner = full[1];
-      dispatch({
-        changes: { from, to, insert: inner },
-        selection: EditorSelection.single(from, from + inner.length),
-      });
-      return true;
-    }
-
-    // Selection/cursor inside an existing wrapper: remove if same color, else recolor.
-    const wrap = htmlSpanAt(state, from, `<span style="${attr}:`, close);
-    if (wrap) {
-      const inner = slice(state, wrap.textFrom, wrap.textTo);
-      const openTag = state.doc.sliceString(wrap.from, wrap.textFrom);
-      const same = openTag.includes(`:${color}"`);
-      const insert = same ? inner : open + inner + close;
-      dispatch({
-        changes: { from: wrap.from, to: wrap.to, insert },
-        selection: EditorSelection.single(
-          wrap.from + (same ? 0 : open.length),
-          wrap.from + (same ? inner.length : open.length + inner.length)
-        ),
-      });
-      return true;
-    }
-
-    if (from === to) {
-      const insert = open + "text" + close;
-      dispatch({
-        changes: { from, to: from, insert },
-        selection: EditorSelection.range(from + open.length, from + open.length + 4),
-      });
-      return true;
-    }
-
-    dispatch({
-      changes: { from, to, insert: open + text + close },
-      selection: EditorSelection.single(from + open.length, to + open.length),
-    });
-    return true;
-  };
-}
-
-export const toggleTextColor = (color: string): FormatCommand => wrapColored("color", color);
-export const toggleHighlightColor = (color: string): FormatCommand => wrapColored("bg", color);
-
-function stripSpan(region: string, attr: string): string {
-  return region.replace(
-    new RegExp(`<span style="${attr}:[^"]*">([\\s\\S]*?)<\\/span>`, "g"),
-    "$1"
-  );
-}
-
-export const removeColor: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-  const { start, end } = lineRange(state, from, to);
-  const region = slice(state, start, end);
-  const cleaned = stripSpan(region, "color");
-  if (cleaned === region) return false;
-  dispatch({ changes: { from: start, to: end, insert: cleaned } });
-  return true;
-};
-
-export const removeHighlight: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-  const { start, end } = lineRange(state, from, to);
-  const region = slice(state, start, end);
-  const cleaned = region
-    .replace(/<span style="background-color:[^"]*">([\s\S]*?)<\/span>/g, "$1")
-    .replace(/==([\s\S]*?)==/g, "$1");
-  if (cleaned === region) return false;
-  dispatch({ changes: { from: start, to: end, insert: cleaned } });
-  return true;
-};
-
-/* ------------------------------------------------------------------ */
-/* Task list                                                           */
-/* ------------------------------------------------------------------ */
-
-const checklistRe = /^([-*+]\s+)\[([ xX])\]\s+/;
-
-export const toggleChecklist: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-  const { start, end } = lineRange(state, from, to);
-  const lines = slice(state, start, end).split("\n");
-  if (!lines.length) return false;
-  const allHave = lines.every((l) => checklistRe.test(l));
-  const insert = lines
-    .map((l) => {
-      if (allHave) {
-        const m = l.match(checklistRe)!;
-        const checked = m[2].toLowerCase() === "x";
-        return `${m[1]}[${checked ? " " : "x"}] ${l.slice(m[0].length)}`;
-      }
-      const stripped = l.replace(/^([-*+]\s+|\d+\.\s+)/, "");
-      return `- [ ] ${stripped}`;
-    })
-    .join("\n");
-  dispatch({ changes: { from: start, to: end, insert } });
-  return true;
-};
-
-/* ------------------------------------------------------------------ */
-/* Insertions: wikilink, image, table, callout, attachment             */
-/* ------------------------------------------------------------------ */
-
-export function insertWikilink(name: string, label?: string): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from, to } = state.selection.main;
-    const text = label && label !== name ? `[[${name}|${label}]]` : `[[${name}]]`;
-    dispatch({
-      changes: { from, to, insert: text },
-      selection: EditorSelection.cursor(from + text.length),
-    });
-    return true;
-  };
-}
-
-export function insertImage(alt: string, url: string): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from, to } = state.selection.main;
-    const text = `![${alt}](${url})`;
-    dispatch({
-      changes: { from, to, insert: text },
-      selection: EditorSelection.range(from + alt.length + 4, from + alt.length + 4 + url.length),
-    });
-    return true;
-  };
-}
-
-export function insertTable(rows: number, cols: number): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from } = state.selection.main;
-    const header = `| ${Array.from({ length: cols }, (_, i) => `Col ${i + 1}`).join(" | ")} |`;
-    const sep = `| ${Array(cols).fill("---").join(" | ")} |`;
-    const bodyRows = Math.max(1, rows - 1);
-    const body = Array.from(
-      { length: bodyRows },
-      () => `| ${Array(cols).fill("   ").join(" | ")} |`
-    ).join("\n");
-    const table = `${header}\n${sep}\n${body}`;
-    const line = state.doc.lineAt(from);
-    const prefix = from > 0 && line.from !== from ? "\n" : "";
-    const insert = `${prefix}${table}\n`;
-    const cellFrom = from + prefix.length + header.length + 1 + sep.length + 1 + 2;
-    dispatch({
-      changes: { from, to: from, insert },
-      selection: EditorSelection.cursor(cellFrom),
-    });
-    return true;
-  };
-}
-
-export function insertCallout(type = "note", title?: string): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from, to } = state.selection.main;
-    const head = title ? `> [!${type}] ${title}\n` : `> [!${type}]\n`;
-    const insert = head + "> ";
-    dispatch({
-      changes: { from, to, insert },
-      selection: EditorSelection.cursor(from + insert.length),
-    });
-    return true;
-  };
-}
-
-export function insertAttachment(name: string, relPath: string): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from, to } = state.selection.main;
-    const text = `[${name}](${relPath})`;
-    dispatch({
-      changes: { from, to, insert: text },
-      selection: EditorSelection.cursor(from + text.length),
-    });
-    return true;
-  };
-}
-
-/* ------------------------------------------------------------------ */
-/* Alignment (HTML, compatible with Obsidian)                          */
-/* ------------------------------------------------------------------ */
-
-const alignDivRe = /^(<div align="(left|center|right)">)([\s\S]*)(<\/div>)$/;
-
-export function toggleAlign(align: "left" | "center" | "right"): FormatCommand {
-  return (target) => {
-    const { state, dispatch } = target;
-    const { from, to } = state.selection.main;
-    const { start, end } = lineRange(state, from, to);
-    const region = slice(state, start, end);
-    const m = alignDivRe.exec(region);
-    if (m) {
-      if (align === "left" || m[2] === align) {
-        dispatch({ changes: { from: start, to: end, insert: m[3] } });
-      } else {
-        dispatch({ changes: { from: start, to: end, insert: `<div align="${align}">${m[3]}</div>` } });
-      }
-      return true;
-    }
-    if (align === "left") return false;
-    const open = `<div align="${align}">`;
-    dispatch({
-      changes: { from: start, to: end, insert: `${open}${region}</div>` },
-      selection: EditorSelection.single(start + open.length, end + open.length),
-    });
-    return true;
-  };
-}
-
-/* ------------------------------------------------------------------ */
-/* Explicit code block                                                 */
-/* ------------------------------------------------------------------ */
-
-function fencedBlockAt(state: EditorState, pos: number): { from: number; to: number } | null {
-  const doc = state.doc;
-  const line = doc.lineAt(pos);
-  let open = fenceLineRe.test(line.text) ? line.number : -1;
-  if (open < 0) {
-    for (let n = line.number - 1; n >= 1; n--) {
-      if (fenceLineRe.test(doc.line(n).text)) {
-        open = n;
-        break;
-      }
-    }
-  }
-  if (open < 1) return null;
-  for (let n = open + 1; n <= doc.lines; n++) {
-    if (fenceLineRe.test(doc.line(n).text)) {
-      return { from: doc.line(open).from, to: doc.line(n).to };
-    }
-  }
-  return null;
-}
-
-export const toggleFencedCode: FormatCommand = (target) => {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-  const { start, end } = lineRange(state, from, to);
-
-  const block = fencedBlockAt(state, start);
-  if (block) {
-    const body = slice(state, block.from, block.to).split("\n").slice(1, -1).join("\n");
-    dispatch({ changes: { from: block.from, to: block.to, insert: body } });
-    return true;
-  }
-
-  const region = slice(state, start, end);
-  dispatch({
-    changes: { from: start, to: end, insert: "```\n" + region + "\n```" },
-    selection: EditorSelection.single(start + 4, end + 4),
-  });
-  return true;
-};
-
-/* ------------------------------------------------------------------ */
-/* Active-state detection                                             */
-/* ------------------------------------------------------------------ */
-
-export interface FormatState {
-  bold: boolean;
-  italic: boolean;
-  strike: boolean;
-  underline: boolean;
-  highlight: boolean;
-  inlineCode: boolean;
-  color: string | null;
-  hColor: string | null;
-  heading: number;
-  list: "bullet" | "ordered" | "checklist" | null;
-  align: "left" | "center" | "right" | null;
-}
-
-function countOccurrences(text: string, sub: string): number {
-  let count = 0;
-  let i = 0;
-  while ((i = text.indexOf(sub, i)) !== -1) {
-    count += 1;
-    i += sub.length;
-  }
-  return count;
-}
-
-function oddBefore(line: string, pos: number, marker: string): boolean {
-  return countOccurrences(line.slice(0, pos), marker) % 2 === 1;
-}
-
-export function detectFormatting(state: EditorState, pos: number): FormatState {
-  const line = state.doc.lineAt(pos);
-  const inLine = pos - line.from;
-  const before = line.text.slice(0, inLine);
-  const italic = (countOccurrences(before, "*") - 2 * countOccurrences(before, "**")) % 2 === 1;
-
-  let list: FormatState["list"] = null;
-  if (checklistRe.test(line.text)) list = "checklist";
-  else if (/^[-*+]\s+/.test(line.text)) list = "bullet";
-  else if (orderedRe.test(line.text)) list = "ordered";
-
-  let align: FormatState["align"] = null;
-  const div = htmlSpanAt(state, pos, "<div align=", "</div>");
-  if (div) {
-    const tag = state.doc.sliceString(div.from, div.textFrom).toLowerCase();
-    if (tag.includes('align="center"')) align = "center";
-    else if (tag.includes('align="right"')) align = "right";
-    else align = "left";
-  }
-
-  const u = htmlSpanAt(state, pos, "<u>", "</u>");
-  const mark = htmlSpanAt(state, pos, '<mark style="background-color:', "</mark>");
-  const span = htmlSpanAt(state, pos, '<span style="color:', "</span>");
-
-  return {
-    bold: oddBefore(line.text, inLine, "**"),
-    italic,
-    strike: oddBefore(line.text, inLine, "~~"),
-    underline: u !== null,
-    highlight: oddBefore(line.text, inLine, "==") || mark !== null,
-    inlineCode: oddBefore(line.text, inLine, "`"),
-    color: span ? hexFrom(state.doc.sliceString(span.from, span.textFrom)) : null,
-    hColor: mark ? hexFrom(state.doc.sliceString(mark.from, mark.textFrom)) : null,
-    heading: headingLevelAt(state, pos),
-    list,
-    align,
-  };
-}
-
-export const captureFormat: (state: EditorState, pos: number) => FormatState = detectFormatting;
-
-/* ------------------------------------------------------------------ */
-/* Format painter                                                      */
-/* ------------------------------------------------------------------ */
-
-function selectionWrapped(state: EditorState, open: string, close: string): boolean {
-  const { from, to } = state.selection.main;
-  const t = slice(state, from, to);
-  return t.startsWith(open) && t.endsWith(close);
-}
-
-function ensureWrap(target: FormatTarget, open: string, close: string): boolean {
-  const { state, dispatch } = target;
-  const { from, to } = state.selection.main;
-  if (from === to) return false;
-  dispatch({
-    changes: [
-      { from, to: from, insert: open },
-      { from: to, to: to, insert: close },
-    ],
-    selection: EditorSelection.single(from + open.length, to + open.length),
-  });
-  return true;
-}
-
-export function applyFormatPainter(target: FormatTarget, fmt: FormatState): boolean {
-  let changed = false;
-  if (fmt.bold && !selectionWrapped(target.state, "**", "**")) changed = ensureWrap(target, "**", "**") || changed;
-  if (fmt.italic && !selectionWrapped(target.state, "*", "*")) changed = ensureWrap(target, "*", "*") || changed;
-  if (fmt.strike && !selectionWrapped(target.state, "~~", "~~")) changed = ensureWrap(target, "~~", "~~") || changed;
-  if (fmt.underline && !selectionWrapped(target.state, "<u>", "</u>")) changed = ensureWrap(target, "<u>", "</u>") || changed;
-  if (fmt.highlight && !selectionWrapped(target.state, "==", "==")) changed = ensureWrap(target, "==", "==") || changed;
-
-  const hasSelection =
-    target.state.selection.main.from !== target.state.selection.main.to;
-  if (fmt.color && hasSelection) {
-    const t = slice(target.state, target.state.selection.main.from, target.state.selection.main.to);
-    if (!/^<span style="color:[^"]*">/.test(t)) changed = toggleTextColor(fmt.color)(target) || changed;
-  }
-  if (fmt.hColor && hasSelection) {
-    const t = slice(target.state, target.state.selection.main.from, target.state.selection.main.to);
-    if (!/^<span style="background-color:[^"]*">/.test(t)) changed = toggleHighlightColor(fmt.hColor)(target) || changed;
-  }
-
-  const cur = detectFormatting(target.state, target.state.selection.main.from);
-  if (fmt.heading && cur.heading !== fmt.heading) changed = setHeading(fmt.heading)(target) || changed;
-  if (fmt.list && cur.list !== fmt.list) {
-    if (fmt.list === "bullet") changed = toggleBulletList(target) || changed;
-    else if (fmt.list === "ordered") changed = toggleOrderedList(target) || changed;
-    else if (fmt.list === "checklist") changed = toggleChecklist(target) || changed;
-  }
-  return changed;
-}

src/renderer/native-assembly.ts

@@ -0,0 +1,82 @@
+// Pure assembly logic for the Full Book view.
+//
+// The Full Book renders every chapter's native rich-text document back-to-back
+// in a single read-only ProseMirror surface, separated by ChapterBreak anchors.
+// These helpers are kept free of DOM/IPC so they can be unit-tested directly
+// and reused by the renderer (book.ts).
+import type { FolioNode } from "../main/native-doc.js";
+import type { WikilinkTarget } from "./wikilinks.js";
+
+export interface FullBookChapterInput {
+  id: string;
+  title: string;
+  // Native ProseMirror document ({ type: "doc", content: [...] }).
+  doc: FolioNode;
+}
+
+export interface FullBookAssembly {
+  nativeDoc: FolioNode;
+  chapterEntries: { id: string; title: string }[];
+  targets: WikilinkTarget[];
+}
+
+// Concatenate the plain text of a native node tree (used for word/char counts).
+// Atom leaf nodes (chapterBreak, image, horizontal rule, …) carry no text.
+export function nativeNodeText(node: FolioNode): string {
+  if (node.text) return node.text;
+  let t = "";
+  for (const c of node.content ?? []) t += nativeNodeText(c);
+  return t;
+}
+
+// Whether the native content already opens with a heading matching its title,
+// in which case we must not inject a duplicate title heading.
+export function nativeHasTitleHeading(content: FolioNode[], title: string): boolean {
+  const t = title.trim().toLowerCase();
+  if (!t) return false;
+  for (const n of content) {
+    if (n.type === "heading" && nativeNodeText(n).trim().toLowerCase() === t) return true;
+  }
+  return false;
+}
+
+// Build the top-level nodes for one chapter in the Full Book, injecting a title
+// heading when the content does not already provide one.
+export function buildChapterNativeContent(content: FolioNode[], title: string): FolioNode[] {
+  if (nativeHasTitleHeading(content, title)) return content.slice();
+  return [
+    { type: "heading", attrs: { level: 1 }, content: [{ type: "text", text: title }] },
+    ...content,
+  ];
+}
+
+// A ChapterBreak anchor marking where a chapter begins in the assembled view.
+export function chapterBreakNode(id: string, title: string, first: boolean): FolioNode {
+  return { type: "chapterBreak", attrs: { chapterId: id, title, first } };
+}
+
+// Assemble the whole book directly from native chapter documents. The first
+// chapter's break is unmarked; every following chapter gets a separator break.
+export function buildFullBookDoc(chapters: FullBookChapterInput[]): FullBookAssembly {
+  const nativeContent: FolioNode[] = [];
+  const chapterEntries: { id: string; title: string }[] = [];
+  const targets: WikilinkTarget[] = [];
+  let index = 0;
+  for (const ch of chapters) {
+    targets.push({ id: ch.id, title: ch.title });
+
+    const chapterDoc =
+      ch.doc && ch.doc.type === "doc" ? ch.doc : { type: "doc" as const, content: [] };
+    const content = Array.isArray(chapterDoc.content) ? chapterDoc.content : [];
+    nativeContent.push(chapterBreakNode(ch.id, ch.title, index === 0));
+    for (const n of buildChapterNativeContent(content, ch.title)) nativeContent.push(n);
+
+    chapterEntries.push({ id: ch.id, title: ch.title });
+    index++;
+  }
+  return {
+    nativeDoc: { type: "doc", content: nativeContent },
+    chapterEntries,
+    targets,
+  };
+}

src/renderer/print-format.ts

@@ -1,136 +1,170 @@
 // Print rendering for the PDF-exported manuscript (#printBook).
 //
-// The PDF is produced by printing plain HTML, so this renderer has to keep
-// every formatting feature Folio's editor can write. Standard markdown is
-// handled by markdown-it; the extensions on top of it are:
-//   - raw HTML passthrough (html: true) so the toolbar's <u>, <span style=...>
-//     and <div align=...> survive instead of showing as literal text,
-//   - Obsidian-style ==highlight== rendered as <mark>,
-//   - Obsidian callouts (> [!note] Title) rendered as styled divs,
-//   - wikilinks ([[Title]]) resolved to links via the shared wikilink plugin.
-import MarkdownIt from "markdown-it";
-import type {
-  MarkdownIt as MarkdownItInstance,
-  StateCore,
-  StateInline,
-} from "markdown-it";
-import { wikilinkPlugin, type WikilinkTarget } from "./wikilinks.js";
+// The PDF is produced by printing plain HTML, so this renderer walks the
+// native Folio document model directly and emits HTML that keeps every
+// formatting feature the editor can write. Chapters are emitted as
+// <section class="print-chapter"> blocks, delimited by the chapterBreak nodes
+// the Full Book assembly inserts between chapters.
+import type { FolioMark, FolioNode } from "../main/native-doc.js";
 
-// ==text== -> <mark>text</mark>
-function highlightPlugin(md: MarkdownItInstance) {
-  const parse = (state: StateInline, silent: boolean): boolean => {
-    const src = state.src;
-    const max = state.posMax;
-    const start = state.pos;
-    if (start + 2 > max) return false;
-    if (src.charCodeAt(start) !== 0x3d /* = */ || src.charCodeAt(start + 1) !== 0x3d)
-      return false;
-    let end = -1;
-    for (let i = start + 2; i < max - 1; i++) {
-      const ch = src.charCodeAt(i);
-      if (ch === 0x0a /* newline */) return false;
-      if (ch === 0x3d && src.charCodeAt(i + 1) === 0x3d) {
-        end = i;
-        break;
+// Native-document print rendering for the PDF-exported manuscript (#printBook).
+//
+// Like renderPrintChapters but it consumes the native Folio document model
+// directly instead of Markdown, so PDF output stays in sync with the editor
+// after the migration. Chapters are emitted as <section class="print-chapter">
+// blocks, delimited by the chapterBreak nodes that the Full Book assembly
+// inserts between chapters.
+function esc(s: string): string {
+  return s
+    .replace(/&/g, "&amp;")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;");
 }
-    }
-    if (end === -1) return false;
-    const content = src.slice(start + 2, end);
-    if (!content.trim()) return false;
-    if (silent) {
-      state.pos = end + 2;
-      return true;
-    }
-    state.push("highlight_open", "mark", 1);
-    state.push("text", "", 0).content = content;
-    state.push("highlight_close", "mark", -1);
-    state.pos = end + 2;
-    return true;
+
+const ALIGN = (node?: FolioNode): string => {
+  const a = node?.attrs;
+  const parts: string[] = [];
+  const ta = a?.textAlign ? String(a.textAlign) : "";
+  if (ta && ta !== "left") parts.push(`text-align:${esc(ta)}`);
+  if (a?.lineHeight) parts.push(`line-height:${esc(String(a.lineHeight))}`);
+  return parts.length ? ` style="${parts.join(";")}"` : "";
 };
-  md.inline.ruler.before("emphasis", "highlight", parse);
-  md.renderer.rules.highlight_open = () => "<mark>";
-  md.renderer.rules.highlight_close = () => "</mark>";
+
+// Wrap a string with the formatting marks on a text node. Order matters: link
+// is outermost, then font/size, then color/highlight, then underline/strike,
+// then bold/italic, with code innermost.
+function applyMarksHtml(text: string, marks: FolioMark[] = []): string {
+  let out = text;
+  const has = (t: string) => marks.some((m) => m.type === t);
+  if (has("code")) out = `<code>${out}</code>`;
+  if (has("italic")) out = `<em>${out}</em>`;
+  if (has("bold")) out = `<strong>${out}</strong>`;
+  if (has("strike")) out = `<s>${out}</s>`;
+  if (has("underline")) out = `<u>${out}</u>`;
+  const hl = marks.find((m) => m.type === "highlight");
+  if (hl) {
+    const color = hl.attrs?.color ? String(hl.attrs.color) : "";
+    out = color ? `<span style="background-color:${esc(color)}">${out}</span>` : `<mark>${out}</mark>`;
+  }
+  const tc = marks.find((m) => m.type === "textColor");
+  if (tc?.attrs?.color) out = `<span style="color:${esc(String(tc.attrs.color))}">${out}</span>`;
+  const ff = marks.find((m) => m.type === "fontFamily");
+  if (ff?.attrs?.fontFamily) out = `<span style="font-family:${esc(String(ff.attrs.fontFamily))}">${out}</span>`;
+  const fsz = marks.find((m) => m.type === "fontSize");
+  if (fsz?.attrs?.fontSize) out = `<span style="font-size:${esc(String(fsz.attrs.fontSize))}">${out}</span>`;
+  const link = marks.find((m) => m.type === "link");
+  if (link?.attrs?.href) {
+    const href = String(link.attrs.href);
+    const internal = href.startsWith("folio:chapter/");
+    const cls = internal ? ' class="wikilink internal"' : "";
+    out = `<a href="${esc(href)}"${cls}>${out}</a>`;
+  }
+  return out;
 }
 
-const CALLOUT_RE = /^\s*\[!([a-zA-Z0-9_-]+)\]\s*(.*)$/;
-
-// > [!note] Title followed by "> body" lines becomes a styled callout div.
-// Runs after inline parsing so blockquote paragraphs already have children.
-function calloutPlugin(md: MarkdownItInstance) {
-  md.core.ruler.after("inline", "callout", (state: StateCore) => {
-    const tokens = state.tokens;
-    for (let i = 0; i < tokens.length; i++) {
-      const open = tokens[i];
-      if (open.type !== "blockquote_open") continue;
-      let depth = 1;
-      let closeIdx = -1;
-      for (let j = i + 1; j < tokens.length; j++) {
-        const t = tokens[j];
-        if (t.type === "blockquote_open") depth += 1;
-        else if (t.type === "blockquote_close") {
-          depth -= 1;
-          if (depth === 0) {
-            closeIdx = j;
-            break;
+function inlineToHtml(nodes: FolioNode[] = []): string {
+  let out = "";
+  for (const n of nodes) {
+    if (n.type === "text") out += applyMarksHtml(n.text ?? "", n.marks);
+    else if (n.type === "hard_break") out += "<br>";
+    else if (n.type === "image") {
+      const src = esc(String(n.attrs?.src ?? ""));
+      const alt = esc(String(n.attrs?.alt ?? ""));
+      out += `<img src="${src}" alt="${alt}">`;
     }
   }
-      }
-      if (closeIdx === -1) continue;
-      const paraOpen = tokens[i + 1];
-      if (!paraOpen || paraOpen.type !== "paragraph_open") continue;
-      const inline = tokens[i + 2];
-      if (!inline || inline.type !== "inline" || !inline.children) continue;
-      const first = inline.children[0];
-      if (!first || first.type !== "text") continue;
-      const m = CALLOUT_RE.exec(first.content);
-      if (!m) continue;
-
-      const calloutType = m[1].toLowerCase();
-      const title = m[2].trim();
-
-      open.type = "callout_open";
-      open.tag = "div";
-      open.attrs = [["class", `callout callout-${calloutType}`]];
-      const close = tokens[closeIdx];
-      close.type = "callout_close";
-      close.tag = "div";
-
-      // Strip the "[!type] Title" marker from the first paragraph and drop
-      // any text tokens that became empty as a result (plus the softbreak the
-      // marker line left behind).
-      first.content = "";
-      inline.children = inline.children.filter(
-        (c) => !(c.type === "text" && c.content === "")
-      );
-      if (inline.children[0]?.type === "softbreak") inline.children.shift();
-
-      if (title) {
-        const titleOpen = new state.Token("paragraph_open", "p", 1);
-        titleOpen.attrs = [["class", "callout-title"]];
-        const titleInline = new state.Token("inline", "", 0);
-        titleInline.content = title;
-        const titleText = new state.Token("text", "", 0);
-        titleText.content = title;
-        titleInline.children = [titleText];
-        const titleClose = new state.Token("paragraph_close", "p", -1);
-        tokens.splice(i + 1, 0, titleOpen, titleInline, titleClose);
-      }
-    }
-  });
-  md.renderer.rules.callout_open = (tokens, idx) =>
-    `<div class="${tokens[idx].attrGet("class") ?? "callout"}">`;
-  md.renderer.rules.callout_close = () => "</div>";
+  return out;
 }
 
-export function renderPrintChapters(
-  chapters: string[],
-  targets: WikilinkTarget[]
-): string {
-  const md = new MarkdownIt({ html: true });
-  md.use(wikilinkPlugin, { chapters: targets });
-  md.use(highlightPlugin);
-  md.use(calloutPlugin);
-  return chapters
-    .map((c) => `<section class="print-chapter">${md.render(c)}</section>`)
+function blockToHtml(node: FolioNode): string {
+  switch (node.type) {
+    case "heading": {
+      const level = Number(node.attrs?.level ?? 1);
+      return `<h${level}${ALIGN(node)}>${inlineToHtml(node.content)}</h${level}>`;
+    }
+    case "paragraph": {
+      const isTitle = String(node.attrs?.class ?? "") === "callout-title";
+      const cls = isTitle ? ' class="callout-title"' : "";
+      return `<p${cls}${ALIGN(node)}>${inlineToHtml(node.content)}</p>`;
+    }
+    case "bulletList":
+      return `<ul>${listItemsToHtml(node.content)}</ul>`;
+    case "orderedList":
+      return `<ol>${listItemsToHtml(node.content)}</ol>`;
+    case "taskList":
+      return `<ul class="task-list">${listItemsToHtml(node.content, true)}</ul>`;
+    case "blockquote":
+      return calloutToHtml(node);
+    case "codeBlock": {
+      const text = (node.content ?? []).map((c) => c.text ?? "").join("");
+      return `<pre><code>${esc(text)}</code></pre>`;
+    }
+    case "horizontalRule":
+      return "<hr>";
+    case "table":
+      return tableToHtml(node);
+    case "image":
+      return `<img src="${esc(String(node.attrs?.src ?? ""))}" alt="${esc(String(node.attrs?.alt ?? ""))}">`;
+    default:
+      return "";
+  }
+}
+
+function listItemsToHtml(items: FolioNode[] = [], isTask = false): string {
+  return items
+    .map((item) => {
+      const checked = isTask && !!item.attrs?.checked;
+      const prefix = isTask ? (checked ? "&#9746; " : "&#9744; ") : "";
+      const inner = (item.content ?? []).map(blockToHtml).join("");
+      return `<li>${prefix}${inner}</li>`;
+    })
     .join("");
 }
+
+function calloutToHtml(node: FolioNode): string {
+  const isCallout = !!node.attrs?.callout;
+  if (!isCallout) {
+    return `<blockquote>${node.content?.map(blockToHtml).join("") ?? ""}</blockquote>`;
+  }
+  const type = String(node.attrs?.callout);
+  return `<div class="callout callout-${esc(type)}">${
+    node.content?.map(blockToHtml).join("") ?? ""
+  }</div>`;
+}
+
+function tableToHtml(node: FolioNode): string {
+  const rows = (node.content ?? [])
+    .map((row) => {
+      const cells = (row.content ?? [])
+        .map((cell) => {
+          const tag = cell.type === "tableHeader" ? "th" : "td";
+          return `<${tag}>${inlineToHtml((cell.content?.[0]?.content ?? []) as FolioNode[])}</${tag}>`;
+        })
+        .join("");
+      return `<tr>${cells}</tr>`;
+    })
+    .join("");
+  return `<table class="folio-table"><tbody>${rows}</tbody></table>`;
+}
+
+export function renderPrintChaptersNative(doc: FolioNode): string {
+  const sections: string[] = [];
+  let current = "";
+  let started = false;
+  for (const node of doc.content ?? []) {
+    if (node.type === "chapterBreak") {
+      if (started || current) {
+        sections.push(`<section class="print-chapter">${current}</section>`);
+      }
+      current = "";
+      started = true;
+      continue;
+    }
+    current += blockToHtml(node);
+  }
+  if (started || current) {
+    sections.push(`<section class="print-chapter">${current}</section>`);
+  }
+  return sections.join("");
+}

src/renderer/themes.css

@@ -1,10 +1,10 @@
 /* Folio themes.
    Every interface color is driven by the semantic variables below; the UI and
-   CodeMirror styles only ever reference these variables. A theme is therefore
+   editor styles only ever reference these variables. A theme is therefore
    just a block of variable values — adding one means dropping a
    `:root[data-theme="..."]` block here plus an <option> in the theme selector.
 
-   Light is Folio's default: a warm, writing-focused light scheme. Neonflux is
+   Light is Folio's default: a warm, writing-focused light scheme. Dark Mode is
    a fixed dark, futuristic theme. */
 
 /* ---- shared (non-color) tokens ---- */
@@ -47,11 +47,11 @@
   --color-scrollbar-hover: rgba(45, 40, 32, 0.38);
 }
 
-/* ---- Neonflux ----
+/* ---- Dark Mode ----
    Dark, high-contrast, futuristic. A near-black neutral base keeps the
    manuscript comfortable for long writing sessions while electric-cyan accent
    marks active/selected/focused elements, links and controls. */
-:root[data-theme="neonflux"] {
+:root[data-theme="dark-mode"] {
   --color-bg: #0a0d14;
   --color-panel: #121722;
   --color-border: #24304a;
@@ -64,8 +64,8 @@
   --color-on-accent-soft: rgba(6, 19, 28, 0.18);
   --color-on-accent-border: rgba(6, 19, 28, 0.38);
 
-  --color-selection: rgba(34, 211, 238, 0.16);
-  --color-selection-strong: rgba(34, 211, 238, 0.34);
+  --color-selection: rgba(34, 211, 238, 0.55);
+  --color-selection-strong: rgba(34, 211, 238, 0.85);
 
   --color-shadow: rgba(0, 0, 0, 0.55);
   --color-shadow-strong: rgba(0, 0, 0, 0.65);

src/renderer/tiptap-editor.ts

@@ -0,0 +1,573 @@
+// Tiptap 2 (ProseMirror) rich-text editor for Folio chapters.
+//
+// This is the native editor that replaces the Markdown/CodeMirror editing
+// experience. The editor state is ProseMirror/Tiptap JSON and is persisted
+// directly as the native Folio chapter document (see src/main/native-doc.ts).
+// No Markdown is ever held as the editing model.
+//
+// Formatting features map to ProseMirror nodes/marks that are also produced by
+// the Markdown -> native converter, so migrated chapters load and re-save
+// losslessly.
+
+import { Editor, Extension, Mark, Node, mergeAttributes } from "@tiptap/core";
+import StarterKit from "@tiptap/starter-kit";
+import Underline from "@tiptap/extension-underline";
+import Link from "@tiptap/extension-link";
+import Image from "@tiptap/extension-image";
+import TextAlign from "@tiptap/extension-text-align";
+import Highlight from "@tiptap/extension-highlight";
+import TaskList from "@tiptap/extension-task-list";
+import TaskItem from "@tiptap/extension-task-item";
+import Table from "@tiptap/extension-table";
+import TableRow from "@tiptap/extension-table-row";
+import TableHeader from "@tiptap/extension-table-header";
+import TableCell from "@tiptap/extension-table-cell";
+import type { FolioChapterDoc, FolioNode } from "../main/native-doc.js";
+
+// --- Custom marks matching the native Folio schema -------------------------
+// The native model uses `textColor` (not Tiptap's `textStyle`) so the
+// Markdown bridge (native-to-markdown) and the converter agree. Font family
+// and size are stored as their own marks.
+
+const TextColor = Mark.create({
+  name: "textColor",
+  addAttributes() {
+    return {
+      color: {
+        default: null,
+        parseHTML: (el) => (el as HTMLElement).style.color || null,
+        renderHTML: (attrs) =>
+          attrs.color ? { style: `color: ${attrs.color}` } : {},
+      },
+    };
+  },
+  parseHTML() {
+    return [{ style: "color" }];
+  },
+  renderHTML({ HTMLAttributes }) {
+    return ["span", mergeAttributes(HTMLAttributes), 0];
+  },
+});
+
+const FontFamily = Mark.create({
+  name: "fontFamily",
+  addAttributes() {
+    return {
+      fontFamily: {
+        default: null,
+        parseHTML: (el) => (el as HTMLElement).style.fontFamily || null,
+        renderHTML: (attrs) =>
+          attrs.fontFamily
+            ? { style: `font-family: ${attrs.fontFamily}` }
+            : {},
+      },
+    };
+  },
+  parseHTML() {
+    return [{ style: "font-family" }];
+  },
+  renderHTML({ HTMLAttributes }) {
+    return ["span", mergeAttributes(HTMLAttributes), 0];
+  },
+});
+
+const FontSize = Mark.create({
+  name: "fontSize",
+  addAttributes() {
+    return {
+      fontSize: {
+        default: null,
+        parseHTML: (el) => (el as HTMLElement).style.fontSize || null,
+        renderHTML: (attrs) =>
+          attrs.fontSize ? { style: `font-size: ${attrs.fontSize}` } : {},
+      },
+    };
+  },
+  parseHTML() {
+    return [{ style: "font-size" }];
+  },
+  renderHTML({ HTMLAttributes }) {
+    return ["span", mergeAttributes(HTMLAttributes), 0];
+  },
+});
+
+// Line spacing is a block-level property (paragraphs and headings), so it is
+// added as a global attribute on those nodes rather than a mark.
+const LineHeight = Extension.create({
+  name: "lineHeight",
+  addGlobalAttributes() {
+    return [
+      {
+        types: ["paragraph", "heading"],
+        attributes: {
+          lineHeight: {
+            default: null,
+            parseHTML: (el: HTMLElement) => el.style.lineHeight || null,
+            renderHTML: (attrs: Record<string, any>) =>
+              attrs.lineHeight ? { style: `line-height: ${attrs.lineHeight}` } : {},
+          },
+        },
+      },
+    ];
+  },
+});
+
+// Hard break. Registered as `hard_break` (snake_case) to match the rest of the
+// pipeline (markdown-to-native, native-to-markdown, print/office export). StarterKit
+// ships HardBreak as `hardBreak`, which would reject loaded docs containing a
+// `hard_break` node and leave the editor empty, so we override it here.
+const HardBreak = Node.create({
+  name: "hard_break",
+  inline: true,
+  group: "inline",
+  selectable: false,
+  parseHTML() {
+    return [{ tag: "br" }];
+  },
+  renderHTML() {
+    return ["br"];
+  },
+  addCommands() {
+    return {
+      setHardBreak:
+        () =>
+        ({ chain }: any) =>
+          chain().insertContent({ type: "hard_break" }).run(),
+    };
+  },
+  addKeyboardShortcuts() {
+    return {
+      "Shift-Enter": () => this.editor.commands.setHardBreak(),
+      "Mod-Enter": () => this.editor.commands.setHardBreak(),
+    };
+  },
+});
+
+// Block separator rendered between chapters in the Full Book view. It carries
+// the chapter id/title as data attributes so navigation can scroll to it via
+// the DOM, and renders a subtle on-screen rule (except for the first chapter).
+// It contributes no text, so word/character counts ignore it.
+export const ChapterBreak = Node.create({
+  name: "chapterBreak",
+  group: "block",
+  atom: true,
+  selectable: false,
+  draggable: false,
+  addAttributes() {
+    return {
+      chapterId: { default: "" },
+      title: { default: "" },
+      first: { default: false },
+    };
+  },
+  parseHTML() {
+    return [{ tag: "div[data-chapter-id]" }];
+  },
+  renderHTML({ node, HTMLAttributes }) {
+    return [
+      "div",
+      mergeAttributes(HTMLAttributes, {
+        class: "chapter-break" + (node.attrs.first ? " first" : ""),
+        "data-chapter-id": node.attrs.chapterId as string,
+        "data-title": node.attrs.title as string,
+        "data-first": node.attrs.first ? "true" : "false",
+      }),
+    ];
+  },
+});
+
+export interface FormatState {
+  bold: boolean;
+  italic: boolean;
+  underline: boolean;
+  strike: boolean;
+  code: boolean;
+  link: boolean;
+  heading: number; // 0 = paragraph
+  bullet: boolean;
+  ordered: boolean;
+  task: boolean;
+  blockquote: boolean;
+  align: string;
+  color: string;
+  highlight: string;
+  fontFamily: string;
+  fontSize: string;
+  lineHeight: string;
+}
+
+export interface TiptapCallbacks {
+  onChange?: () => void;
+  onSelectionUpdate?: () => void;
+}
+
+export interface TiptapOptions {
+  // Extra ProseMirror/Tiptap extensions (e.g. the Full Book ChapterBreak node).
+  extensions?: any[];
+  // Defaults to true (editable). Pass false for a read-only surface.
+  editable?: boolean;
+}
+
+// Clean office/HTML clipboard content so it pastes reliably. Office suites
+// (OnlyOffice, Word, LibreOffice) put heavily-namespaced, style-laden HTML on
+// the clipboard; ProseMirror's default paste often discards it entirely. We
+// strip the office cruft but keep the real text and basic formatting.
+function sanitizeClipboardHtml(html: string): string {
+  const doc = new DOMParser().parseFromString(html, "text/html");
+  doc
+    .querySelectorAll("script, style, meta, link, title, head, noscript")
+    .forEach((n) => n.remove());
+  const all = Array.from(doc.body.querySelectorAll("*"));
+  for (const el of all) {
+    // Unwrap namespaced (office) elements, keeping their content.
+    if (/:/.test(el.tagName)) {
+      const parent = el.parentNode;
+      if (parent) {
+        while (el.firstChild) parent.insertBefore(el.firstChild, el);
+        parent.removeChild(el);
+      }
+      continue;
+    }
+    for (const attr of Array.from(el.attributes)) {
+      const name = attr.name.toLowerCase();
+      if (
+        name === "style" ||
+        name === "class" ||
+        name === "id" ||
+        name.startsWith("data-") ||
+        name.startsWith("xmlns")
+      ) {
+        el.removeAttribute(attr.name);
+      }
+    }
+  }
+  return doc.body.innerHTML;
+}
+
+// Pull just the visible text out of HTML (used as a last-resort paste fallback
+// when an office clipboard provides HTML that ProseMirror can't parse but no
+// usable text/plain).
+function htmlToText(html: string): string {
+  const doc = new DOMParser().parseFromString(html, "text/html");
+  const text = doc.body.textContent || "";
+  return text.replace(/\r\n/g, "\n").replace(/[ \t]+\n/g, "\n").replace(/\n{3,}/g, "\n\n").trim();
+}
+
+export function createTiptapEditor(
+  host: HTMLElement,
+  callbacks: TiptapCallbacks = {},
+  options: TiptapOptions = {}
+): Editor {
+  const editor = new Editor({
+    element: host,
+    editable: options.editable !== false,
+    extensions: [
+      StarterKit.configure({
+        heading: { levels: [1, 2, 3, 4, 5, 6] },
+        hardBreak: false,
+      }),
+      Underline,
+      Link.configure({
+        openOnClick: false,
+        autolink: true,
+        HTMLAttributes: { rel: "noopener noreferrer" },
+      }),
+      Image.configure({ inline: false, allowBase64: false }),
+      TextAlign.configure({ types: ["heading", "paragraph"] }),
+      Highlight.configure({ multicolor: true }),
+      TaskList,
+      TaskItem.configure({ nested: true }),
+      Table.configure({ resizable: true }),
+      TableRow,
+      TableHeader,
+      TableCell,
+      TextColor,
+      FontFamily,
+      FontSize,
+      LineHeight,
+      HardBreak,
+      ...(options.extensions ?? []),
+    ],
+    editorProps: {
+      attributes: {
+        class: "folio-prose",
+        spellcheck: "true",
+      },
+    },
+    onUpdate: () => callbacks.onChange?.(),
+    onSelectionUpdate: () => callbacks.onSelectionUpdate?.(),
+  });
+
+  // Robust paste. We handle the `paste` event ourselves (capture phase on
+  // document, before ProseMirror's own handler) and insert sanitized content
+  // via Tiptap directly. ProseMirror's default clipboard pipeline silently
+  // dropped Office/OnlyOffice HTML, and a handlePaste that re-invoked
+  // pasteHTML recursed and blocked all pasting — so we bypass it entirely.
+  const dom = editor.view.dom as HTMLElement;
+  const onPaste = (e: ClipboardEvent) => {
+    const t = e.target as globalThis.Node | null;
+    const inside = (t && dom.contains(t)) || document.activeElement === dom;
+    if (!inside) return; // let other fields (inputs, etc.) paste normally
+    const data = e.clipboardData;
+    if (!data) return;
+    const html = data.getData("text/html");
+    const text = data.getData("text/plain");
+    if (!html && !text) return;
+    e.preventDefault();
+    e.stopPropagation();
+    editor.commands.focus();
+    const insert = (content: string) => {
+      try {
+        editor.commands.insertContent(content);
+      } catch {
+        try {
+          editor.commands.insertContent(text || htmlToText(html));
+        } catch {
+          /* nothing we can do */
+        }
+      }
+    };
+    if (html) {
+      const clean = sanitizeClipboardHtml(html);
+      if (clean.replace(/<[^>]*>/g, "").trim().length > 0) {
+        insert(clean);
+        return;
+      }
+    }
+    if (text) {
+      insert(text);
+      return;
+    }
+    if (html) insert(htmlToText(html));
+  };
+  document.addEventListener("paste", onPaste, true);
+  const originalDestroy = editor.destroy.bind(editor);
+  editor.destroy = (...args: Parameters<typeof originalDestroy>) => {
+    document.removeEventListener("paste", onPaste, true);
+    return originalDestroy(...args);
+  };
+
+  return editor;
+}
+
+export function setEditorDoc(editor: Editor, doc: FolioNode): void {
+  // An empty document (no top-level blocks) leaves ProseMirror with nowhere to
+  // place the cursor, so brand-new/empty chapters can't be typed into or pasted
+  // until the user forces a block in. Seed one paragraph so the caret always
+  // has a home and paste works immediately.
+  const content = (doc as { content?: unknown[] } | null)?.content;
+  const safe =
+    content && Array.isArray(content) && content.length > 0
+      ? doc
+      : ({ type: "doc", content: [{ type: "paragraph" }] } as unknown as FolioNode);
+  editor.commands.setContent(safe as unknown as Record<string, unknown>, false);
+}
+
+export function getEditorDoc(editor: Editor): FolioChapterDoc {
+  return {
+    schemaVersion: 1,
+    doc: editor.getJSON() as unknown as FolioNode,
+  };
+}
+
+export function getFormatState(editor: Editor): FormatState {
+  const a = (name: string) => editor.getAttributes(name);
+  let heading = 0;
+  for (let l = 1; l <= 6; l++) {
+    if (editor.isActive("heading", { level: l })) {
+      heading = l;
+      break;
+    }
+  }
+  return {
+    bold: editor.isActive("bold"),
+    italic: editor.isActive("italic"),
+    underline: editor.isActive("underline"),
+    strike: editor.isActive("strike"),
+    code: editor.isActive("code"),
+    link: editor.isActive("link"),
+    heading,
+    bullet: editor.isActive("bulletList"),
+    ordered: editor.isActive("orderedList"),
+    task: editor.isActive("taskList"),
+    blockquote: editor.isActive("blockquote"),
+    align: (a("textAlign").textAlign as string) || "",
+    color: (a("textColor").color as string) || "",
+    highlight: (a("highlight").color as string) || "",
+    fontFamily: (a("fontFamily").fontFamily as string) || "",
+    fontSize: (a("fontSize").fontSize as string) || "",
+    lineHeight: editor.isActive("heading")
+      ? (a("heading").lineHeight as string) || ""
+      : (a("paragraph").lineHeight as string) || "",
+  };
+}
+
+// Apply a toolbar command by name. `payload` carries extra data (URLs, colors,
+// table dimensions, etc.).
+export function runCommand(
+  editor: Editor,
+  cmd: string,
+  payload: Record<string, unknown> = {}
+): void {
+  const chain = () => editor.chain().focus();
+  switch (cmd) {
+    case "bold":
+      chain().toggleBold().run();
+      break;
+    case "italic":
+      chain().toggleItalic().run();
+      break;
+    case "underline":
+      chain().toggleUnderline().run();
+      break;
+    case "strike":
+      chain().toggleStrike().run();
+      break;
+    case "code":
+      chain().toggleCode().run();
+      break;
+    case "link": {
+      const href = String(payload.href ?? "").trim();
+      if (!href) chain().unsetLink().run();
+      else chain().extendMarkRange("link").setLink({ href }).run();
+      break;
+    }
+    case "hr":
+      chain().setHorizontalRule().run();
+      break;
+    case "bullet":
+      chain().toggleBulletList().run();
+      break;
+    case "number":
+      chain().toggleOrderedList().run();
+      break;
+    case "checklist":
+      chain().toggleTaskList().run();
+      break;
+    case "quote":
+      chain().toggleBlockquote().run();
+      break;
+    case "codeblock":
+      chain().toggleCodeBlock().run();
+      break;
+    case "paragraph":
+      chain().setParagraph().run();
+      break;
+    case "h1":
+    case "h2":
+    case "h3":
+    case "h4":
+    case "h5":
+    case "h6": {
+      const level = Number(cmd.slice(1)) as 1 | 2 | 3 | 4 | 5 | 6;
+      if (editor.isActive("heading", { level })) chain().setParagraph().run();
+      else chain().toggleHeading({ level }).run();
+      break;
+    }
+    case "align-left":
+      chain().setTextAlign("left").run();
+      break;
+    case "align-center":
+      chain().setTextAlign("center").run();
+      break;
+    case "align-right":
+      chain().setTextAlign("right").run();
+      break;
+    case "align-justify":
+      chain().setTextAlign("justify").run();
+      break;
+    case "indent":
+      chain().sinkListItem("listItem").run();
+      break;
+    case "outdent":
+      chain().liftListItem("listItem").run();
+      break;
+    case "clear":
+      chain().unsetAllMarks().run();
+      break;
+    case "color": {
+      const c = payload.color ? String(payload.color) : "";
+      if (c) chain().setMark("textColor", { color: c }).run();
+      else chain().unsetMark("textColor").run();
+      break;
+    }
+    case "highlight": {
+      const c = payload.color ? String(payload.color) : "";
+      if (c) chain().toggleHighlight({ color: c }).run();
+      else chain().unsetHighlight().run();
+      break;
+    }
+    case "fontfamily": {
+      const f = payload.fontFamily ? String(payload.fontFamily) : "";
+      if (f) chain().setMark("fontFamily", { fontFamily: f }).run();
+      else chain().unsetMark("fontFamily").run();
+      break;
+    }
+    case "fontsize": {
+      const s = payload.fontSize ? String(payload.fontSize) : "";
+      if (s) chain().setMark("fontSize", { fontSize: s }).run();
+      else chain().unsetMark("fontSize").run();
+      break;
+    }
+    case "linespacing": {
+      const lh = payload.lineHeight ? String(payload.lineHeight) : "";
+      const block = editor.isActive("heading") ? "heading" : "paragraph";
+      if (lh) chain().updateAttributes(block, { lineHeight: lh }).run();
+      else chain().updateAttributes(block, { lineHeight: null }).run();
+      break;
+    }
+    case "table":
+      chain()
+        .insertTable({
+          rows: Number(payload.rows ?? 3),
+          cols: Number(payload.cols ?? 2),
+          withHeaderRow: true,
+        })
+        .run();
+      break;
+    case "image": {
+      const src = String(payload.src ?? "");
+      if (src) {
+        chain()
+          .setImage({ src, alt: String(payload.alt ?? "") })
+          .run();
+      }
+      break;
+    }
+    case "wikilink": {
+      const href = String(payload.href ?? "");
+      const text = String(payload.text ?? href);
+      if (href) {
+        chain().insertContent({
+          type: "text",
+          text,
+          marks: [{ type: "link", attrs: { href } }],
+        }).run();
+      }
+      break;
+    }
+    case "addRowBefore":
+      chain().addRowBefore().run();
+      break;
+    case "addRowAfter":
+      chain().addRowAfter().run();
+      break;
+    case "addColumnBefore":
+      chain().addColumnBefore().run();
+      break;
+    case "addColumnAfter":
+      chain().addColumnAfter().run();
+      break;
+    case "deleteRow":
+      chain().deleteRow().run();
+      break;
+    case "deleteColumn":
+      chain().deleteColumn().run();
+      break;
+    case "deleteTable":
+      chain().deleteTable().run();
+      break;
+    default:
+      break;
+  }
+}

tests/.folio-editor-test-entry.ts

@@ -0,0 +1,9 @@
+// Headless automated test for the Tiptap editor integration (Stage 3).
+// Verifies: editor command -> ProseMirror JSON state -> native persistence ->
+// reload round-trip, plus loading a Markdown-migrated document into the editor.
+//
+// Run with: node tests/run-editor-test.mjs
+export { createTiptapEditor, runCommand, getEditorDoc, setEditorDoc } from "../src/renderer/tiptap-editor.ts";
+export { setChapterDoc, getChapterDoc, parseChapter, CURRENT_DOC_SCHEMA_VERSION } from "../src/main/native-doc.ts";
+export { createBook, loadBook, saveMeta } from "../src/main/project.ts";
+export { markdownToNative } from "../src/main/markdown-to-native.ts";

tests/.folio-fullbook-test-entry.ts

@@ -0,0 +1,14 @@
+// Headless test entry for the native Full Book assembly + rendering.
+// Run with: node tests/run-fullbook-test.mjs
+export {
+  buildFullBookDoc,
+  nativeNodeText,
+  chapterHasOwnHeading,
+} from "../src/renderer/native-assembly.ts";
+export {
+  createTiptapEditor,
+  setEditorDoc,
+  getEditorDoc,
+  ChapterBreak,
+} from "../src/renderer/tiptap-editor.ts";
+export { CURRENT_DOC_SCHEMA_VERSION } from "../src/main/native-doc.ts";

tests/run-e2e.sh

@@ -1,18 +0,0 @@
-#!/usr/bin/env sh
-# End-to-end self-test runner (Linux, requires xvfb-run for headless).
-# Creates a throwaway book, opens it via folio:openBookPath (no dialogs),
-# runs the full chapter CRUD scenario through the real renderer -> IPC -> chapters
-# chain, prints a JSON summary, and quits. Inert unless run explicitly.
-set -e
-BOOK=$(node -e 'const fs=require("fs"),path=require("path"),os=require("os");const d=fs.mkdtempSync(path.join(os.tmpdir(),"folio-e2e-"));fs.mkdirSync(path.join(d,"chapters"),{recursive:true});fs.writeFileSync(path.join(d,"folio.json"),JSON.stringify({app:"folio",version:1,title:"E2E Book",chapterOrder:[],chapters:{}}));process.stdout.write(d);')
-BOOK2=$(node -e 'const fs=require("fs"),path=require("path"),os=require("os");const d=fs.mkdtempSync(path.join(os.tmpdir(),"folio-e2e2-"));fs.mkdirSync(path.join(d,"chapters"),{recursive:true});fs.writeFileSync(path.join(d,"folio.json"),JSON.stringify({app:"folio",version:1,title:"E2E Book 2",chapterOrder:[],chapters:{}}));process.stdout.write(d);')
-BOOK3=$(node -e 'const fs=require("fs"),path=require("path"),os=require("os");const d=fs.mkdtempSync(path.join(os.tmpdir(),"folio-e2e3-"));fs.mkdirSync(path.join(d,"chapters"),{recursive:true});const titles=["One","Two","Three","Four"];const chapters={};const order=[];titles.forEach((t,i)=>{const id="ch"+(i+1);const file=path.posix.join("chapters",id+".md");order.push(id);chapters[id]={id,title:t,file};const body=Array.from({length:40},(_,p)=>`Paragraph ${p} of chapter ${t}: the quick brown fox jumps over the lazy dog while the whole manuscript stays deterministic and long enough to scroll.`).join("\n\n");fs.writeFileSync(path.join(d,file),`# ${t}\n\n${body}`);});fs.writeFileSync(path.join(d,"folio.json"),JSON.stringify({app:"folio",version:1,title:"Nav Book",chapterOrder:order,chapters}));process.stdout.write(d);')
-export FOLIO_SELF_TEST=1
-export FOLIO_TEST_BOOK="$BOOK"
-export FOLIO_TEST_BOOK2="$BOOK2"
-export FOLIO_TEST_BOOK3="$BOOK3"
-export FOLIO_TEST_PDF="$BOOK/export-test.pdf"
-export FOLIO_TEST_DOCX="$BOOK/export-test.docx"
-export FOLIO_TEST_ODT="$BOOK/export-test.odt"
-trap 'rm -rf "$BOOK" "$BOOK2" "$BOOK3"' EXIT
-xvfb-run -a electron .

tests/run-editor-test.mjs

@@ -0,0 +1,223 @@
+// Runner for the Tiptap editor test. Sets up a jsdom DOM, then dynamically
+// imports the bundled editor module so Tiptap sees a browser-like environment.
+import esbuild from "esbuild";
+import fs from "fs";
+import os from "os";
+import path from "path";
+import url from "url";
+import { JSDOM } from "jsdom";
+
+const dom = new JSDOM("<!DOCTYPE html><html><body></body></html>", {
+  pretendToBeVisual: true,
+  url: "http://localhost/",
+});
+const { window } = dom;
+const g = globalThis;
+g.window = window;
+g.document = window.document;
+g.HTMLElement = window.HTMLElement;
+g.Element = window.Element;
+g.Node = window.Node;
+g.MutationObserver = window.MutationObserver;
+g.getComputedStyle = window.getComputedStyle.bind(window);
+g.DOMParser = window.DOMParser;
+g.requestAnimationFrame = (cb) => setTimeout(cb, 0);
+g.cancelAnimationFrame = (id) => clearTimeout(id);
+
+const out = path.join(os.tmpdir(), `folio-editor-${process.pid}.mjs`);
+const entry = path.resolve("tests/.folio-editor-test-entry.ts");
+await esbuild.build({
+  entryPoints: [entry],
+  bundle: true,
+  platform: "node",
+  format: "esm",
+  outfile: out,
+  write: true,
+  logLevel: "silent",
+});
+
+const mod = await import(url.pathToFileURL(out).href);
+const {
+  createTiptapEditor,
+  runCommand,
+  getEditorDoc,
+  setEditorDoc,
+  setChapterDoc,
+  getChapterDoc,
+  parseChapter,
+  createBook,
+  saveMeta,
+  markdownToNative,
+} = mod;
+
+let failures = 0;
+function ok(cond, msg) {
+  if (cond) console.log("  ok -", msg);
+  else {
+    failures++;
+    console.error("FAIL -", msg);
+  }
+}
+
+function findNodes(node, type, acc = []) {
+  if (!node || typeof node !== "object") return acc;
+  if (node.type === type) acc.push(node);
+  for (const c of node.content ?? []) findNodes(c, type, acc);
+  return acc;
+}
+function findMarks(node, type, acc = []) {
+  for (const m of node.marks ?? []) if (m.type === type) acc.push(m);
+  for (const c of node.content ?? []) findMarks(c, type, acc);
+  return acc;
+}
+function allText(node, acc = "") {
+  if (node.text) acc += node.text;
+  for (const c of node.content ?? []) acc = allText(c, acc);
+  return acc;
+}
+
+function makeEditor() {
+  const host = window.document.createElement("div");
+  window.document.body.appendChild(host);
+  return createTiptapEditor(host, {});
+}
+
+const book = fs.mkdtempSync(path.join(os.tmpdir(), "folio-ed-"));
+const meta = createBook(book, "Editor Book");
+const id = "chap-1";
+meta.chapters[id] = { id, title: "Chapter One", file: `chapters/${id}.json` };
+meta.chapterOrder = [id];
+saveMeta(book, meta);
+
+// --- editor command -> state (each feature on a fresh editor) ---
+function editorDocAfter(commands) {
+  const ed = makeEditor();
+  for (const c of commands) {
+    if (typeof c === "function") c(ed);
+    else runCommand(ed, c.cmd, c.payload);
+  }
+  const d = getEditorDoc(ed);
+  return { ed, doc: d.doc };
+}
+
+let r;
+r = editorDocAfter([{ cmd: "h2" }, (ed) => ed.commands.insertContent("Title")]);
+ok(r.doc.type === "doc", "editor state is a ProseMirror doc");
+ok(findNodes(r.doc, "heading").some((h) => h.attrs?.level === 2), "heading level 2 present");
+ok(allText(r.doc).includes("Title"), "inserted heading text present");
+
+r = editorDocAfter([{ cmd: "bullet" }, (ed) => ed.commands.insertContent("item one")]);
+ok(findNodes(r.doc, "bulletList").length === 1, "bullet list present");
+ok(allText(r.doc).includes("item one"), "bullet list text present");
+
+r = editorDocAfter([
+  { cmd: "bold" },
+  (ed) => ed.commands.insertContent("bolded"),
+  { cmd: "color", payload: { color: "#ff0000" } },
+  (ed) => ed.commands.insertContent("red"),
+]);
+ok(findMarks(r.doc, "bold").length >= 1, "bold mark present");
+ok(findMarks(r.doc, "textColor").some((m) => m.attrs?.color === "#ff0000"), "text color mark present");
+
+r = editorDocAfter([
+  { cmd: "table", payload: { rows: 2, cols: 2 } },
+  { cmd: "image", payload: { src: "assets/x.png", alt: "x" } },
+]);
+ok(findNodes(r.doc, "table").length === 1, "table present");
+ok(findNodes(r.doc, "image").length === 1, "image present");
+ok(findNodes(r.doc, "image")[0]?.attrs?.src === "assets/x.png", "image src preserved");
+
+// A richer document combining several features in one editor. Each block-level
+// feature is placed in its own block so toggling a list does not consume the
+// heading (which is the correct ProseMirror behavior).
+const editor = makeEditor();
+runCommand(editor, "h2");
+editor.commands.insertContent("Hello world");
+editor.commands.insertContent({ type: "paragraph" });
+runCommand(editor, "bold");
+editor.commands.insertContent("bolded");
+runCommand(editor, "color", { color: "#ff0000" });
+editor.commands.insertContent(" red");
+editor.commands.insertContent({ type: "paragraph" });
+runCommand(editor, "bullet");
+editor.commands.insertContent("list item");
+runCommand(editor, "table", { rows: 2, cols: 2 });
+runCommand(editor, "image", { src: "assets/x.png", alt: "x" });
+
+const doc = getEditorDoc(editor);
+ok(allText(doc.doc).includes("Hello world"), "combined document has text");
+ok(findNodes(doc.doc, "heading").some((h) => h.attrs?.level === 2), "combined: heading present");
+ok(findMarks(doc.doc, "bold").length >= 1, "combined: bold present");
+ok(findNodes(doc.doc, "bulletList").length >= 1, "combined: bullet list present");
+ok(findMarks(doc.doc, "textColor").some((m) => m.attrs?.color === "#ff0000"), "combined: color present");
+ok(findNodes(doc.doc, "table").length === 1, "combined: table present");
+ok(findNodes(doc.doc, "image").length === 1, "combined: image present");
+
+// --- state -> native persistence ---
+setChapterDoc(book, id, doc);
+const reloaded = getChapterDoc(book, id);
+ok(reloaded.doc.type === "doc", "persisted chapter reads back as doc");
+ok(
+  JSON.stringify(reloaded.doc) === JSON.stringify(doc.doc),
+  "reload is byte-identical to editor state"
+);
+
+// --- reload -> editor (round trip through a fresh editor) ---
+const editor2 = makeEditor();
+setEditorDoc(editor2, reloaded.doc);
+const doc2 = getEditorDoc(editor2);
+ok(
+  JSON.stringify(doc2.doc) === JSON.stringify(doc.doc),
+  "second editor reproduces same state"
+);
+
+// --- Markdown-migrated document loads into the editor ---
+const migrated = markdownToNative("# Title\n\nSome **strong** text and a [link](https://e.com).");
+const editor3 = makeEditor();
+setEditorDoc(editor3, migrated.doc);
+const doc3 = getEditorDoc(editor3);
+ok(findNodes(doc3.doc, "heading").some((h) => h.attrs?.level === 1), "migrated heading loads");
+ok(findMarks(doc3.doc, "bold").length === 1, "migrated bold loads");
+ok(findMarks(doc3.doc, "link").some((m) => m.attrs?.href === "https://e.com"), "migrated link loads");
+ok(allText(doc3.doc).includes("Title"), "migrated text loads");
+
+// --- document containing a hard break loads (snake_case hard_break node) ---
+// Regression: StarterKit registers HardBreak as `hardBreak`; a doc with a
+// `hard_break` node (as produced by markdown-to-native and the export pipeline)
+// must load and render its text rather than throwing and leaving the editor empty.
+const withBreak = markdownToNative("Line one  \nline two\n\nPara two");
+const editor4 = makeEditor();
+setEditorDoc(editor4, withBreak.doc);
+const doc4 = getEditorDoc(editor4);
+ok(editor4.getText().includes("Line one") && editor4.getText().includes("line two"),
+  "hard_break document renders its text (not empty)");
+ok(findNodes(doc4.doc, "hard_break").length === 1, "hard_break node preserved on load");
+
+// --- legacy camelCase hardBreak (from older editor saves) normalizes on read ---
+const camel = {
+  schemaVersion: 1,
+  doc: {
+    type: "doc",
+    content: [
+      { type: "paragraph", content: [
+        { type: "text", text: "alpha" },
+        { type: "hardBreak" },
+        { type: "text", text: "beta" },
+      ] },
+    ],
+  },
+};
+const normalized = parseChapter(JSON.stringify(camel));
+ok(findNodes(normalized.doc, "hard_break").length === 1, "parseChapter renames hardBreak -> hard_break");
+const editor5 = makeEditor();
+setEditorDoc(editor5, normalized.doc);
+ok(editor5.getText().includes("alpha") && editor5.getText().includes("beta"),
+  "legacy camelCase hardBreak chapter loads (not empty)");
+
+fs.rmSync(out, { force: true });
+fs.rmSync(book, { recursive: true, force: true });
+
+console.log(
+  "\nEditor tests: " + (failures === 0 ? "ALL PASSED" : failures + " FAILED")
+);
+process.exit(failures === 0 ? 0 : 1);

tests/run-format-test.mjs

@@ -1,471 +0,0 @@
-// Standalone test for the Markdown formatting commands (md-format.ts).
-// Bundles with esbuild and drives the commands through a plain
-// { state, dispatch } target, so no DOM is required.
-// Run with: node tests/run-format-test.mjs
-import esbuild from "esbuild";
-import fs from "fs";
-import os from "os";
-import path from "path";
-import url from "url";
-
-// Write the bundle inside the repo so node can resolve the external
-// @codemirror/state peer dependency (same instance as the one imported below).
-const out = path.resolve(`tests/.tmp-folio-format-${process.pid}.mjs`);
-await esbuild.build({
-  entryPoints: [path.resolve("src/renderer/md-format.ts")],
-  bundle: true,
-  platform: "node",
-  format: "esm",
-  external: ["@codemirror/state"],
-  outfile: out,
-  write: true,
-  logLevel: "silent",
-});
-
-const mod = await import(url.pathToFileURL(out).href);
-const {
-  toggleBold,
-  toggleItalic,
-  toggleStrikethrough,
-  toggleInlineCode,
-  toggleCode,
-  toggleLink,
-  setHeading,
-  toggleBulletList,
-  toggleOrderedList,
-  toggleBlockquote,
-  insertHorizontalRule,
-  clearFormatting,
-  headingLevelAt,
-  toggleUnderline,
-  toggleHighlight,
-  toggleTextColor,
-  toggleHighlightColor,
-  removeColor,
-  removeHighlight,
-  toggleChecklist,
-  insertWikilink,
-  insertImage,
-  insertTable,
-  insertCallout,
-  toggleAlign,
-  toggleFencedCode,
-  detectFormatting,
-  applyFormatPainter,
-} = mod;
-
-// Build a minimal { state, dispatch } target around an EditorState.
-import { EditorState } from "@codemirror/state";
-
-function target(doc, anchor, head = anchor) {
-  let state = EditorState.create({
-    doc,
-    selection: { anchor, head },
-  });
-  const t = {
-    get state() {
-      return state;
-    },
-    dispatch(spec) {
-      state = state.update(spec).state;
-      return true;
-    },
-  };
-  return {
-    t,
-    text: () => state.doc.toString(),
-    sel: () => state.selection.main,
-    select: (a, h = a) => (state = state.update({ selection: { anchor: a, head: h } }).state),
-  };
-}
-
-let failures = 0;
-function ok(cond, msg) {
-  if (cond) console.log("  ok -", msg);
-  else {
-    failures++;
-    console.error("FAIL -", msg);
-  }
-}
-function eq(actual, expected, msg) {
-  ok(actual === expected, `${msg} (got ${JSON.stringify(actual)}, want ${JSON.stringify(expected)})`);
-}
-
-// ---- bold ----
-{
-  const { t, text, sel } = target("say hello world", 4, 9); // "hello"
-  toggleBold(t);
-  eq(text(), "say **hello** world", "bold wraps selection");
-  eq(sel().from, 6, "bold keeps selection on inner text (from)");
-  eq(sel().to, 11, "bold keeps selection on inner text (to)");
-  toggleBold(t); // cursor/selection still over inner text -> unwrap
-  eq(text(), "say hello world", "bold toggles back off");
-}
-
-// ---- bold with empty cursor ----
-{
-  const { t, text, sel } = target("abc", 1);
-  toggleBold(t);
-  eq(text(), "a****bc", "bold on empty cursor inserts marker pair");
-  eq(sel().from, 3, "bold cursor placed between markers");
-  toggleBold(t);
-  eq(text(), "abc", "bold on cursor toggles back off");
-}
-
-// ---- bold unwrap when whole span selected ----
-{
-  const { t, text, sel } = target("x **bold** y", 2, 10);
-  toggleBold(t);
-  eq(text(), "x bold y", "bold unwraps when selection includes markers");
-  eq(sel().from, 2, "unwrapped selection anchor");
-  eq(sel().to, 6, "unwrapped selection head");
-}
-
-// ---- italic must not unwrap bold markers ----
-{
-  const { t, text } = target("**bold**", 2, 6); // inside bold
-  toggleItalic(t);
-  eq(text(), "***bold***", "italic inside bold produces bold+italic, not a broken span");
-  const { t: t2, text: text2 } = target("*em*", 1, 3); // inside italic
-  toggleItalic(t2);
-  eq(text2(), "em", "italic toggles off when already inside italic markers");
-  const { t: t3, text: text3 } = target("*em*", 0, 4); // whole italic span
-  toggleItalic(t3);
-  eq(text3(), "em", "italic unwraps whole span");
-}
-
-// ---- strikethrough ----
-{
-  const { t, text, sel } = target("strike this text", 0, 6);
-  toggleStrikethrough(t);
-  eq(text(), "~~strike~~ this text", "strikethrough wraps selection");
-  eq(sel().from, 2, "strikethrough selection from");
-  toggleStrikethrough(t);
-  eq(text(), "strike this text", "strikethrough toggles back off");
-}
-
-// ---- inline code ----
-{
-  const { t, text } = target("run `npm` and code here", 5, 8);
-  toggleInlineCode(t);
-  eq(text(), "run npm and code here", "inline code toggles off when already in a code span");
-  const { t: t2, text: text2 } = target("var x = 1;", 0, 9);
-  toggleInlineCode(t2);
-  eq(text2(), "`var x = 1`;", "inline code wraps normal text");
-}
-
-// ---- links ----
-{
-  const { t, text, sel } = target("visit example", 6, 13);
-  toggleLink(t);
-  eq(text(), "visit [example](url)", "link wraps selection with url placeholder");
-  eq(sel().from, 16, "link selects url placeholder (from)");
-  eq(sel().to, 19, "link selects url placeholder (to)");
-}
-{
-  const { t, text, sel } = target("ab", 1);
-  toggleLink(t);
-  eq(text(), "a[](url)b", "link on empty cursor inserts empty label");
-  eq(sel().from, 2, "link cursor inside label brackets");
-}
-{
-  const { t, text, sel } = target("see [docs](old-url) here", 4, 19);
-  toggleLink(t);
-  eq(text(), "see [docs](old-url) here", "link edit does not change text");
-  eq(sel().from, 11, "link edit selects url (from)");
-  eq(sel().to, 18, "link edit selects url (to)");
-}
-
-// ---- code: inline vs fenced ----
-{
-  const { t, text } = target("var x = 1;", 0, 9);
-  toggleCode(t);
-  eq(text(), "`var x = 1`;", "code on single line uses inline markers");
-}
-{
-  const { t, text, select } = target("line one\nline two", 0, 16);
-  toggleCode(t);
-  eq(text(), "```\nline one\nline two\n```", "code on multiple lines uses a fenced block");
-  select(0, 25);
-  toggleCode(t);
-  eq(text(), "line one\nline two", "fenced code toggles back off");
-}
-{
-  const { t, text } = target("before\n```\ncode a\ncode b\n```\nafter", 7, 24);
-  toggleCode(t);
-  eq(text(), "before\ncode a\ncode b\nafter", "fenced code unwraps when selection starts at the fence");
-}
-{
-  const { t, text } = target("abc", 1);
-  toggleCode(t);
-  eq(text(), "a``bc", "code on empty cursor inserts inline markers");
-}
-
-// ---- headings ----
-{
-  const { t, text } = target("Chapter one", 0);
-  setHeading(2)(t);
-  eq(text(), "## Chapter one", "setHeading adds level 2 marker");
-  setHeading(3)(t);
-  eq(text(), "### Chapter one", "setHeading changes existing level");
-  setHeading(3)(t);
-  eq(text(), "### Chapter one", "setHeading same level is a no-op");
-  setHeading(0)(t);
-  eq(text(), "Chapter one", "setHeading paragraph clears heading");
-}
-{
-  const { t } = target("# Title", 3);
-  ok(headingLevelAt(t.state, 3) === 1, "headingLevelAt detects level 1");
-  const { t: t2 } = target("plain", 2);
-  ok(headingLevelAt(t2.state, 2) === 0, "headingLevelAt returns 0 for plain line");
-}
-
-// ---- bullet list ----
-{
-  const { t, text } = target("one\ntwo\nthree", 0, 13);
-  toggleBulletList(t);
-  eq(text(), "- one\n- two\n- three", "bullet list prefixes each line");
-  toggleBulletList(t);
-  eq(text(), "one\ntwo\nthree", "bullet list toggles back off");
-}
-{
-  const { t, text } = target("already listed", 0);
-  toggleBulletList(t);
-  eq(text(), "- already listed", "bullet list works with cursor only");
-}
-
-// ---- numbered list ----
-{
-  const { t, text } = target("one\ntwo", 0, 7);
-  toggleOrderedList(t);
-  eq(text(), "1. one\n2. two", "numbered list numbers each line");
-  toggleOrderedList(t);
-  eq(text(), "one\ntwo", "numbered list toggles back off");
-}
-
-// ---- blockquote ----
-{
-  const { t, text } = target("quoted words", 0);
-  toggleBlockquote(t);
-  eq(text(), "> quoted words", "blockquote prefixes line");
-  toggleBlockquote(t);
-  eq(text(), "quoted words", "blockquote toggles back off");
-}
-
-// ---- horizontal rule ----
-{
-  const { t, text, sel } = target("", 0);
-  insertHorizontalRule(t);
-  eq(text(), "---\n\n", "hr inserts at doc start");
-  eq(sel().from, 5, "hr cursor after rule");
-}
-{
-  const { t, text } = target("para\n\nnext", 5); // start of the empty line
-  insertHorizontalRule(t);
-  eq(text(), "para\n\n---\n\nnext", "hr inserts on empty line");
-}
-{
-  const { t, text } = target("mid | line", 4);
-  insertHorizontalRule(t);
-  eq(text(), "mid \n\n---\n\n| line", "hr splits a line in the middle");
-}
-
-// ---- clear formatting ----
-{
-  const { t, text } = target("## **Bold** and ~~strike~~", 0, 26);
-  clearFormatting(t);
-  eq(text(), "Bold and strike", "clear formatting strips heading, bold, strike");
-}
-{
-  const { t, text } = target("- item\n> quote\n1. thing\n`code` and [label](https://x.com)", 0, 57);
-  clearFormatting(t);
-  eq(text(), "item\nquote\nthing\ncode and label", "clear formatting handles lists, quote, code, links");
-}
-{
-  const { t, text } = target("==hi== and <u>under</u> and <span style=\"color:#e11d48\">red</span>", 0, 64);
-  clearFormatting(t);
-  eq(text(), "hi and under and red", "clear formatting strips highlight, underline, color");
-}
-
-// ---- underline ----
-{
-  const { t, text, sel } = target("some text", 5, 9);
-  toggleUnderline(t);
-  eq(text(), "some <u>text</u>", "underline wraps selection");
-  eq(sel().from, 8, "underline selection from");
-  toggleUnderline(t);
-  eq(text(), "some text", "underline toggles back off");
-}
-{
-  const { t, text } = target("a <u>mid</u> b", 6); // cursor inside <u>…</u>
-  toggleUnderline(t);
-  eq(text(), "a mid b", "underline unwraps when cursor is inside");
-}
-{
-  const { t, text, sel } = target("ab", 1);
-  toggleUnderline(t);
-  eq(text(), "a<u></u>b", "underline on empty cursor inserts tag pair");
-  eq(sel().from, 4, "underline cursor between tags");
-}
-
-// ---- highlight (Obsidian ==) ----
-{
-  const { t, text } = target("mark this", 0, 4);
-  toggleHighlight(t);
-  eq(text(), "==mark== this", "highlight wraps selection");
-  toggleHighlight(t);
-  eq(text(), "mark this", "highlight toggles back off");
-}
-
-// ---- text color ----
-{
-  const { t, text, sel } = target("red text", 0, 3);
-  toggleTextColor("#e11d48")(t);
-  eq(text(), '<span style="color:#e11d48">red</span> text', "text color wraps selection");
-  eq(sel().from, 28, "text color keeps selection on text");
-  toggleTextColor("#e11d48")(t);
-  eq(text(), "red text", "text color toggles off with same color");
-}
-{
-  const { t, text } = target("change color", 0, 6);
-  toggleTextColor("#e11d48")(t);
-  toggleTextColor("#3b82f6")(t);
-  eq(text(), '<span style="color:#3b82f6">change</span> color', "text color replaces existing color");
-}
-
-// ---- highlight color ----
-{
-  const { t, text } = target("mark this", 0, 4);
-  toggleHighlightColor("#fde047")(t);
-  eq(text(), '<span style="background-color:#fde047">mark</span> this', "highlight color wraps selection");
-  removeHighlight(t);
-  eq(text(), "mark this", "removeHighlight strips background color");
-}
-{
-  const { t, text } = target("==plain==", 0, 8);
-  removeHighlight(t);
-  eq(text(), "plain", "removeHighlight strips Obsidian markers");
-}
-{
-  const { t, text } = target("colored", 0, 7);
-  toggleTextColor("#e11d48")(t);
-  removeColor(t);
-  eq(text(), "colored", "removeColor strips text color");
-}
-
-// ---- checklist ----
-{
-  const { t, text } = target("buy milk\nwrite note", 0, 19);
-  toggleChecklist(t);
-  eq(text(), "- [ ] buy milk\n- [ ] write note", "checklist prefixes lines");
-  toggleChecklist(t);
-  eq(text(), "- [x] buy milk\n- [x] write note", "checklist toggles to checked");
-  toggleChecklist(t);
-  eq(text(), "- [ ] buy milk\n- [ ] write note", "checklist toggles back unchecked");
-}
-{
-  const { t, text } = target("1. numbered item", 0, 16);
-  toggleChecklist(t);
-  eq(text(), "- [ ] numbered item", "checklist converts numbered item");
-}
-
-// ---- wikilink ----
-{
-  const { t, text, sel } = target("see intro", 4, 9);
-  insertWikilink("Introduction")(t);
-  eq(text(), "see [[Introduction]]", "wikilink inserts target");
-  eq(sel().from, 20, "wikilink cursor after insertion");
-}
-{
-  const { t, text } = target("see intro", 4, 9);
-  insertWikilink("Introduction", "intro")(t);
-  eq(text(), "see [[Introduction|intro]]", "wikilink with alias label");
-}
-
-// ---- image ----
-{
-  const { t, text, sel } = target("before", 6);
-  insertImage("alt", "https://x.com/a.png")(t);
-  eq(text(), "before![alt](https://x.com/a.png)", "image inserts markdown");
-  eq(sel().from, 13, "image selects url start");
-  eq(sel().to, 32, "image selects url end");
-}
-
-// ---- table ----
-{
-  const { t, text } = target("para", 4);
-  insertTable(3, 2)(t);
-  eq(
-    text(),
-    "para\n| Col 1 | Col 2 |\n| --- | --- |\n|     |     |\n|     |     |\n",
-    "table inserts header, separator, body rows"
-  );
-}
-
-// ---- callout ----
-{
-  const { t, text } = target("body here", 0);
-  insertCallout("note", "Tip")(t);
-  eq(text(), "> [!note] Tip\n> body here", "callout inserts Obsidian blockquote syntax");
-}
-
-// ---- alignment ----
-{
-  const { t, text } = target("centered line", 0);
-  toggleAlign("center")(t);
-  eq(text(), '<div align="center">centered line</div>', "align wraps paragraph in HTML div");
-  toggleAlign("center")(t);
-  eq(text(), "centered line", "align toggles back off");
-  toggleAlign("center")(t);
-  toggleAlign("right")(t);
-  eq(text(), '<div align="right">centered line</div>', "align replaces alignment");
-  toggleAlign("left")(t);
-  eq(text(), "centered line", "align left clears alignment");
-}
-
-// ---- fenced code block ----
-{
-  const { t, text } = target("single line", 0);
-  toggleFencedCode(t);
-  eq(text(), "```\nsingle line\n```", "code block wraps single line");
-  toggleFencedCode(t);
-  eq(text(), "single line", "code block toggles off");
-}
-
-// ---- detectFormatting ----
-{
-  const { t } = target("**bold** and *italic* and <u>under</u> and ==hl==", 6);
-  const f = detectFormatting(t.state, 6);
-  ok(f.bold === true, "detectFormatting finds bold");
-  ok(f.italic === false, "detectFormatting bold not italic");
-}
-{
-  const { t } = target("# Heading\nplain", 3);
-  ok(detectFormatting(t.state, 3).heading === 1, "detectFormatting finds heading");
-}
-{
-  const { t } = target("- [ ] task", 3);
-  ok(detectFormatting(t.state, 3).list === "checklist", "detectFormatting finds checklist");
-}
-{
-  const { t } = target("- item", 3);
-  ok(detectFormatting(t.state, 3).list === "bullet", "detectFormatting finds bullet list");
-}
-{
-  const { t } = target("1. item", 3);
-  ok(detectFormatting(t.state, 3).list === "ordered", "detectFormatting finds ordered list");
-}
-
-// ---- format painter ----
-{
-  const { t, text } = target("**bold source** plain target", 0, 16);
-  const fmt = { ...detectFormatting(t.state, 8), bold: true };
-  const { t: t2, text: text2 } = target("**bold source** plain target", 16, 28);
-  applyFormatPainter(t2, fmt);
-  eq(text2(), "**bold source** **plain target**", "format painter applies bold");
-}
-
-fs.rmSync(out, { force: true });
-
-console.log("\nFormat tests: " + (failures === 0 ? "ALL PASSED" : failures + " FAILED"));
-process.exit(failures === 0 ? 0 : 1);

tests/run-fullbook-test.mjs

@@ -0,0 +1,195 @@
+// Runner for the native Full Book test. Builds a jsdom DOM, bundles the
+// renderer assembly + Tiptap modules, and verifies that a book assembled from
+// native chapters renders with correct chapter order, page-break anchors,
+// reorder behavior, title injection, and Copy-All native fidelity.
+import esbuild from "esbuild";
+import fs from "fs";
+import os from "os";
+import path from "path";
+import url from "url";
+import { JSDOM } from "jsdom";
+
+const dom = new JSDOM("<!DOCTYPE html><html><body></body></html>", {
+  pretendToBeVisual: true,
+  url: "http://localhost/",
+});
+const { window } = dom;
+const g = globalThis;
+g.window = window;
+g.document = window.document;
+g.HTMLElement = window.HTMLElement;
+g.Element = window.Element;
+g.Node = window.Node;
+g.MutationObserver = window.MutationObserver;
+g.getComputedStyle = window.getComputedStyle.bind(window);
+g.DOMParser = window.DOMParser;
+g.requestAnimationFrame = (cb) => setTimeout(cb, 0);
+g.cancelAnimationFrame = (id) => clearTimeout(id);
+
+const out = path.join(os.tmpdir(), `folio-fullbook-${process.pid}.mjs`);
+const entry = path.resolve("tests/.folio-fullbook-test-entry.ts");
+await esbuild.build({
+  entryPoints: [entry],
+  bundle: true,
+  platform: "node",
+  format: "esm",
+  outfile: out,
+  write: true,
+  logLevel: "silent",
+});
+
+const mod = await import(url.pathToFileURL(out).href);
+const {
+  buildFullBookDoc,
+  nativeNodeText,
+  createTiptapEditor,
+  setEditorDoc,
+  getEditorDoc,
+  ChapterBreak,
+  CURRENT_DOC_SCHEMA_VERSION,
+} = mod;
+
+let failures = 0;
+function ok(cond, msg) {
+  if (cond) console.log("  ok -", msg);
+  else {
+    failures++;
+    console.error("FAIL -", msg);
+  }
+}
+
+function findNodes(node, type, acc = []) {
+  if (!node || typeof node !== "object") return acc;
+  if (node.type === type) acc.push(node);
+  for (const c of node.content ?? []) findNodes(c, type, acc);
+  return acc;
+}
+
+// A native chapter doc with a single paragraph of the given text.
+function paraDoc(text) {
+  return {
+    type: "doc",
+    content: [{ type: "paragraph", content: [{ type: "text", text }] }],
+  };
+}
+function headingDoc(text) {
+  return {
+    type: "doc",
+    content: [{ type: "heading", attrs: { level: 1 }, content: [{ type: "text", text }] }],
+  };
+}
+
+function makeFullBookEditor() {
+  const host = window.document.createElement("div");
+  window.document.body.appendChild(host);
+  return createTiptapEditor(host, { onChange: () => undefined }, { editable: false, extensions: [ChapterBreak] });
+}
+
+// --- canonical chapter order / navigation anchors ---
+const chapters = [
+  { id: "c1", title: "One", markdown: "Body one", doc: paraDoc("Body one") },
+  { id: "c2", title: "Two", markdown: "Body two", doc: paraDoc("Body two") },
+  { id: "c3", title: "Three", markdown: "Body three", doc: paraDoc("Body three") },
+];
+const assembled = buildFullBookDoc(chapters);
+ok(assembled.chapterEntries.length === 3, "three chapter entries produced");
+ok(
+  assembled.chapterEntries.map((c) => c.id).join(",") === "c1,c2,c3",
+  "chapter order follows canonical chapterOrder"
+);
+ok(
+  findNodes(assembled.nativeDoc, "chapterBreak").length === 3,
+  "one chapterBreak anchor per chapter"
+);
+ok(
+  findNodes(assembled.nativeDoc, "chapterBreak")[0].attrs.first === true,
+  "first chapter break is marked first"
+);
+ok(
+  findNodes(assembled.nativeDoc, "chapterBreak").slice(1).every((n) => n.attrs.first === false),
+  "subsequent chapter breaks are not first (page breaks)"
+);
+
+// Render into the read-only editor and check DOM anchors in order.
+const editor = makeFullBookEditor();
+setEditorDoc(editor, assembled.nativeDoc);
+const anchors = Array.from(editor.view.dom.querySelectorAll("[data-chapter-id]"));
+ok(anchors.length === 3, "three DOM anchors rendered");
+ok(
+  anchors.map((a) => a.getAttribute("data-chapter-id")).join(",") === "c1,c2,c3",
+  "DOM anchors preserve canonical order"
+);
+ok(anchors[0].classList.contains("first"), "first anchor carries first class");
+ok(
+  anchors.slice(1).every((a) => !a.classList.contains("first")),
+  "subsequent anchors are plain chapter-break separators"
+);
+
+// --- reorder impact on Full Book output ---
+const reordered = buildFullBookDoc([chapters[1], chapters[0], chapters[2]]);
+const reAnchors = Array.from(
+  (() => {
+    const e = makeFullBookEditor();
+    setEditorDoc(e, reordered.nativeDoc);
+    return e.view.dom;
+  })().querySelectorAll("[data-chapter-id]")
+);
+ok(
+  reAnchors.map((a) => a.getAttribute("data-chapter-id")).join(",") === "c2,c1,c3",
+  "reordering chapterOrder reorders Full Book output"
+);
+
+// --- title injection fidelity ---
+const withHeading = buildFullBookDoc([
+  { id: "h1", title: "Title", markdown: "# Title\nrest", doc: headingDoc("Title") },
+]);
+ok(
+  findNodes(withHeading.nativeDoc, "heading").length === 1,
+  "chapter already starting with matching heading is not duplicated"
+);
+const withoutHeading = buildFullBookDoc([
+  { id: "h2", title: "Title", markdown: "body", doc: paraDoc("body") },
+]);
+const heads = findNodes(withoutHeading.nativeDoc, "heading");
+ok(heads.length === 1 && heads[0].attrs.level === 1, "missing title heading is injected as H1");
+ok(
+  nativeNodeText(withoutHeading.nativeDoc).includes("Title"),
+  "injected title text appears in the assembled book"
+);
+
+// --- Copy All native fidelity (round trip) ---
+const copyJson = JSON.stringify(getEditorDoc(editor));
+const parsed = JSON.parse(copyJson);
+const firstDoc = getEditorDoc(editor).doc;
+ok(parsed.schemaVersion === CURRENT_DOC_SCHEMA_VERSION, "copied native doc has schema version");
+ok(
+  findNodes(parsed.doc, "chapterBreak").length === 3,
+  "copied native doc preserves chapterBreak anchors"
+);
+const editor2 = makeFullBookEditor();
+setEditorDoc(editor2, parsed.doc);
+ok(
+  JSON.stringify(getEditorDoc(editor2).doc) === JSON.stringify(firstDoc),
+  "copied native doc reloads byte-identical to editor state"
+);
+ok(
+  nativeNodeText(parsed.doc).includes("Body one") &&
+    nativeNodeText(parsed.doc).includes("Body three"),
+  "copied native content preserves chapter text"
+);
+
+// --- word / char counts ---
+const text = nativeNodeText(assembled.nativeDoc);
+ok(text.includes("Body one") && text.includes("Body three"), "word/char source includes all chapters");
+ok(text.split(/\s+/).filter(Boolean).length >= 3, "word count reflects chapter text");
+
+// --- empty book ---
+const empty = buildFullBookDoc([]);
+ok(
+  empty.nativeDoc.type === "doc" && Array.isArray(empty.nativeDoc.content) && empty.nativeDoc.content.length === 0,
+  "empty book assembles to empty doc"
+);
+
+fs.rmSync(out, { force: true });
+console.log("\nFull Book tests: " + (failures === 0 ? "ALL PASSED" : failures + " FAILED"));
+process.exit(failures === 0 ? 0 : 1);

tests/run-migration-test.mjs

@@ -0,0 +1,303 @@
+// Standalone test for Stage 2 of the rich-text migration:
+//   - native document model (Tiptap/ProseMirror JSON)
+//   - Markdown -> native conversion (headings, bold, italic, strike, code,
+//     lists, checklists, tables, images, links, wikilinks, callouts,
+//     highlight, blockquote, hr)
+//   - native persistence + schema versioning
+//   - migration + external recovery backup
+//   - idempotency (original .md untouched)
+// Builds src/main/migration.ts with esbuild (no Electron needed).
+// Run with: node tests/run-migration-test.mjs
+import esbuild from "esbuild";
+import fs from "fs";
+import os from "os";
+import path from "path";
+import url from "url";
+
+const out = path.join(os.tmpdir(), `folio-migration-${process.pid}.mjs`);
+const entry = path.resolve(".folio-mig-test-entry.ts");
+fs.writeFileSync(
+  entry,
+  `
+export { migrateChapterToNative, migrateBookToNative, isNativeChapter } from "./src/main/migration.ts";
+export { createBook, loadBook, saveMeta } from "./src/main/project.ts";
+export { setChapterContent, getChapterContent } from "./src/main/chapters.ts";
+export { markdownToNative } from "./src/main/markdown-to-native.ts";
+export { parseChapter, serializeChapter, migrateDoc, getChapterDoc, nativeChapterFile, CURRENT_DOC_SCHEMA_VERSION, isValidDoc } from "./src/main/native-doc.ts";
+export { RECOVERY_ROOT, _resetSessionBackupGuard } from "./src/main/backup.ts";
+`
+);
+await esbuild.build({
+  entryPoints: [entry],
+  bundle: true,
+  platform: "node",
+  format: "esm",
+  outfile: out,
+  write: true,
+  logLevel: "silent",
+});
+fs.rmSync(entry, { force: true });
+
+const mod = await import(url.pathToFileURL(out).href);
+const {
+  createBook,
+  setChapterContent,
+  getChapterContent,
+  loadBook,
+  saveMeta,
+  migrateChapterToNative,
+  migrateBookToNative,
+  isNativeChapter,
+  getChapterDoc,
+  markdownToNative,
+  parseChapter,
+  serializeChapter,
+  migrateDoc,
+  CURRENT_DOC_SCHEMA_VERSION,
+  RECOVERY_ROOT,
+  _resetSessionBackupGuard,
+} = mod;
+
+let failures = 0;
+function ok(cond, msg) {
+  if (cond) console.log("  ok -", msg);
+  else {
+    failures++;
+    console.error("FAIL -", msg);
+  }
+}
+
+function findNodes(node, type, acc = []) {
+  if (!node || typeof node !== "object") return acc;
+  if (node.type === type) acc.push(node);
+  for (const c of node.content ?? []) findNodes(c, type, acc);
+  return acc;
+}
+function findMark(node, type, acc = []) {
+  for (const m of node.marks ?? []) if (m.type === type) acc.push(m);
+  for (const c of node.content ?? []) findMark(c, type, acc);
+  return acc;
+}
+function allText(node, acc = "") {
+  if (node.text) acc += node.text;
+  for (const c of node.content ?? []) acc = allText(c, acc);
+  return acc;
+}
+
+// ---------------------------------------------------------------------------
+// 1. Direct Markdown -> native conversion
+// ---------------------------------------------------------------------------
+const md = `# Title
+
+A paragraph with **bold**, *italic*, ~~strike~~, \`code\` and ==highlight==.
+
+<u>underline</u> and <span style="color:red">red</span> and <span style="background-color:#ff0">yellow bg</span>.
+
+> [!note] Callout title
+> Callout body text.
+
+> A plain blockquote.
+
+- bullet one
+- bullet two
+
+1. first
+2. second
+
+- [ ] todo
+- [x] done
+
+| Name | Age |
+| ---- | --- |
+| Ada  | 36  |
+
+![cat](https://example.com/cat.png)
+
+A [link](https://example.com) and a [[Other Chapter]] wikilink.
+
+\`\`\`js
+const x = 1;
+\`\`\`
+
+---
+
+Final paragraph.
+`;
+
+const doc = markdownToNative(md, {
+  targets: [{ id: "other-chapter-1", title: "Other Chapter" }],
+});
+
+ok(doc.schemaVersion === CURRENT_DOC_SCHEMA_VERSION, "converted doc has current schema version");
+ok(doc.doc.type === "doc", "doc root is type 'doc'");
+ok(findNodes(doc.doc, "heading").length === 1, "one heading converted");
+ok(findNodes(doc.doc, "heading")[0]?.attrs?.level === 1, "heading is level 1");
+ok(findNodes(doc.doc, "paragraph").length >= 5, "paragraphs converted");
+ok(findMark(doc.doc, "bold").length === 1, "bold mark present");
+ok(findMark(doc.doc, "italic").length === 1, "italic mark present");
+ok(findMark(doc.doc, "strike").length === 1, "strike mark present");
+ok(findMark(doc.doc, "code").length === 1, "inline code mark present");
+ok(findMark(doc.doc, "highlight").length >= 2, "highlight marks present (== and bg span)");
+ok(findMark(doc.doc, "textColor").length === 1, "textColor mark present");
+ok(findMark(doc.doc, "underline").length === 1, "underline mark present");
+ok(findNodes(doc.doc, "blockquote").length === 2, "two blockquotes (callout + quote)");
+ok(
+  findNodes(doc.doc, "blockquote").some((b) => b.attrs?.callout === "note"),
+  "callout preserved as blockquote with callout type"
+);
+ok(allText(doc.doc).includes("Callout title"), "callout title preserved");
+ok(findNodes(doc.doc, "bulletList").length === 1, "bullet list converted");
+ok(findNodes(doc.doc, "orderedList").length === 1, "ordered list converted");
+ok(findNodes(doc.doc, "taskList").length === 1, "checklist converted to taskList");
+const checked = findNodes(doc.doc, "taskItem").filter((n) => n.attrs?.checked === true);
+ok(checked.length === 1, "exactly one checklist item marked checked");
+ok(findNodes(doc.doc, "table").length === 1, "table converted");
+ok(findNodes(doc.doc, "tableRow").length === 2, "table has two rows");
+ok(findNodes(doc.doc, "tableHeader").length === 2, "table header cells converted");
+ok(findNodes(doc.doc, "image").length === 1, "image converted");
+ok(
+  findNodes(doc.doc, "image")[0]?.attrs?.src === "https://example.com/cat.png",
+  "external image src kept as-is"
+);
+const links = findMark(doc.doc, "link");
+ok(links.length === 2, "two links (standard + wikilink)");
+ok(
+  links.some((l) => l.attrs?.href === "https://example.com"),
+  "standard link href preserved"
+);
+ok(
+  links.some((l) => l.attrs?.href === "folio:chapter/other-chapter-1"),
+  "wikilink resolved to folio:chapter/<id>"
+);
+ok(findNodes(doc.doc, "codeBlock").length === 1, "fenced code block converted");
+ok(
+  findNodes(doc.doc, "codeBlock")[0]?.attrs?.language === "js",
+  "code block language preserved"
+);
+ok(findNodes(doc.doc, "horizontalRule").length === 1, "horizontal rule converted");
+
+// ---------------------------------------------------------------------------
+// 2. Round-trip serialize / parse / migrate
+// ---------------------------------------------------------------------------
+const reparsed = parseChapter(serializeChapter(doc));
+ok(reparsed.schemaVersion === CURRENT_DOC_SCHEMA_VERSION, "reparsed doc keeps schema version");
+ok(reparsed.doc.type === "doc", "reparsed doc root intact");
+ok(
+  JSON.stringify(reparsed.doc) === JSON.stringify(doc.doc),
+  "serialize -> parse is lossless"
+);
+
+const oldDoc = { schemaVersion: 0, doc: { type: "doc", content: [] } };
+const migrated = migrateDoc(oldDoc);
+ok(migrated.schemaVersion === CURRENT_DOC_SCHEMA_VERSION, "migrateDoc bumps old schema version");
+
+// ---------------------------------------------------------------------------
+// 3. End-to-end migration of a real book (backup + persistence + idempotency)
+// ---------------------------------------------------------------------------
+const book = fs.mkdtempSync(path.join(os.tmpdir(), "folio-test-"));
+_resetSessionBackupGuard();
+const meta = createBook(book, "Migration Book");
+const c1 = "chapter-one-1111";
+const c2 = "chapter-two-2222";
+meta.chapters[c1] = { id: c1, title: "Chapter One", file: `chapters/${c1}.md` };
+meta.chapters[c2] = { id: c2, title: "Chapter Two", file: `chapters/${c2}.md` };
+meta.chapterOrder = [c1, c2];
+saveMeta(book, meta);
+fs.mkdirSync(path.join(book, "chapters"), { recursive: true });
+const md1 = "# One\n\nHello **world**.";
+const md2 = "## Two\n\n- a\n- b\n\n![pic](https://example.com/p.png)";
+fs.writeFileSync(path.join(book, `chapters/${c1}.md`), md1, "utf-8");
+fs.writeFileSync(path.join(book, `chapters/${c2}.md`), md2, "utf-8");
+
+const before1 = fs.readFileSync(path.join(book, `chapters/${c1}.md`), "utf-8");
+const before2 = fs.readFileSync(path.join(book, `chapters/${c2}.md`), "utf-8");
+
+const results = migrateBookToNative(book);
+ok(
+  results.every((r) => r.status === "migrated"),
+  "both chapters migrated"
+);
+ok(fs.existsSync(path.join(book, `chapters/${c1}.json`)), "chapter json written");
+ok(fs.existsSync(path.join(book, `chapters/${c2}.json`)), "chapter json written (2)");
+ok(
+  fs.readFileSync(path.join(book, `chapters/${c1}.md`), "utf-8") === before1,
+  "ORIGINAL .md left untouched (1)"
+);
+ok(
+  fs.readFileSync(path.join(book, `chapters/${c2}.md`), "utf-8") === before2,
+  "ORIGINAL .md left untouched (2)"
+);
+
+const metaAfter = loadBook(book);
+ok(metaAfter.docFormat === "folio-doc", "book marked as folio-doc");
+ok(metaAfter.docSchemaVersion === CURRENT_DOC_SCHEMA_VERSION, "book has doc schema version");
+ok(metaAfter.chapters[c1].file.endsWith(".json"), "chapter entry repointed to .json");
+
+ok(isNativeChapter(book, c1), "isNativeChapter true after migration");
+const readBack = getChapterDoc(book, c1);
+ok(readBack.doc.type === "doc", "migrated chapter reads back as native doc");
+ok(
+  findMark(readBack.doc, "bold").length === 1,
+  "migrated chapter preserved bold"
+);
+
+// Recovery backup exists under ~/Folio-Recovery and contains folio.json
+const bookName = path.basename(book);
+const backups = fs
+  .readdirSync(RECOVERY_ROOT)
+  .filter((d) => d.startsWith(bookName) && fs.statSync(path.join(RECOVERY_ROOT, d)).isDirectory());
+ok(backups.length >= 1, "recovery backup created under ~/Folio-Recovery");
+const backupDir = path.join(RECOVERY_ROOT, backups[0]);
+ok(fs.existsSync(path.join(backupDir, "folio.json")), "backup contains folio.json");
+ok(
+  fs.existsSync(path.join(backupDir, "chapters", `${c1}.md`)),
+  "backup preserves original .md"
+);
+
+// Idempotency: re-migrating does not rewrite .md and reports already-native
+const results2 = migrateBookToNative(book);
+ok(
+  results2.every((r) => r.status === "already-native"),
+  "re-migration is idempotent (already-native)"
+);
+ok(
+  fs.readFileSync(path.join(book, `chapters/${c1}.md`), "utf-8") === before1,
+  "ORIGINAL .md still untouched after re-migration"
+);
+
+// Image asset copy: a local image is copied into assets/ and rewritten.
+const c3 = "chapter-three-3333";
+const meta3 = loadBook(book);
+meta3.chapters[c3] = { id: c3, title: "Chapter Three", file: `chapters/${c3}.md` };
+meta3.chapterOrder.push(c3);
+saveMeta(book, meta3);
+fs.writeFileSync(path.join(book, `chapters/${c3}.md`), "![x](img/local.png)", "utf-8");
+fs.mkdirSync(path.join(book, "img"), { recursive: true });
+fs.writeFileSync(path.join(book, "img", "local.png"), "PNGDATA", "utf-8");
+_resetSessionBackupGuard();
+const r3 = migrateChapterToNative(book, c3);
+ok(r3.status === "migrated", "third chapter (local image) migrated");
+const doc3 = getChapterDoc(book, c3);
+const img3 = findNodes(doc3.doc, "image")[0];
+ok(
+  img3?.attrs?.src?.startsWith("assets/"),
+  "local image reference rewritten to assets/"
+);
+ok(
+  fs.existsSync(path.join(book, img3.attrs.src)),
+  "local image copied into assets/"
+);
+
+// ---------------------------------------------------------------------------
+// Cleanup
+// ---------------------------------------------------------------------------
+fs.rmSync(out, { force: true });
+fs.rmSync(book, { recursive: true, force: true });
+for (const d of backups) {
+  fs.rmSync(path.join(RECOVERY_ROOT, d), { recursive: true, force: true });
+}
+
+console.log(
+  "\nMigration tests: " + (failures === 0 ? "ALL PASSED" : failures + " FAILED")
+);
+process.exit(failures === 0 ? 0 : 1);

tests/run-office-export-test.mjs

@@ -1,7 +1,8 @@
 // Standalone test for the DOCX/ODT Full Book export (office-export.ts).
 // Bundles the main-process module with esbuild and drives buildDocx/buildOdt
-// against a throwaway book, then inspects the produced ZIP contents to check
-// that the manuscript, its chapter order, and its formatting survive.
+// against a throwaway book whose chapters are stored as native Folio document
+// JSON, then inspects the produced ZIP contents to check that the manuscript,
+// its chapter order, and its formatting survive the native -> DOCX path.
 // Run with: node tests/run-office-export-test.mjs
 import esbuild from "esbuild";
 import fs from "fs";
@@ -30,68 +31,131 @@ const check = (name, ok) => {
   if (!ok) failures += 1;
 };
 
-// --- fixture book -----------------------------------------------------------
+// --- fixture book (native JSON chapters) ------------------------------------
 const bookDir = fs.mkdtempSync(path.join(os.tmpdir(), "folio-office-test-"));
 fs.mkdirSync(path.join(bookDir, "chapters"), { recursive: true });
 const chapters = {};
 const order = [];
-const addChapter = (id, title, body) => {
-  const file = path.posix.join("chapters", `${id}.md`);
+
+// Build a native chapter file ({ schemaVersion, doc }).
+const addChapter = (id, title, content) => {
+  const file = path.posix.join("chapters", `${id}.json`);
   order.push(id);
   chapters[id] = { id, title, file };
-  fs.writeFileSync(path.join(bookDir, file), body);
+  fs.writeFileSync(
+    path.join(bookDir, file),
+    JSON.stringify({ schemaVersion: 1, doc: { type: "doc", content } }, null, 2)
+  );
 };
 
-addChapter(
-  "ch1",
-  "Alpha",
-  [
-    "# Alpha",
-    "",
-    "**bold** *italic* ~~strike~~ ==highlight== <u>under</u>",
-    "",
-    '<span style="color:#e11d48">red</span> <span style="background-color:#fde047">marked</span>',
-    "",
-    "- bullet one",
-    "- bullet two",
-    "  - nested bullet",
-    "",
-    "1. numbered one",
-    "2. numbered two",
-    "",
-    "> [!note] Callout title",
-    "> callout body",
-    "",
-    "> plain quote",
-    "",
-    "```js",
-    "const answer = 42;",
-    "```",
-    "",
-    "---",
-    "",
-    "| Head A | Head B |",
-    "| --- | --- |",
-    "| cell 1 | cell 2 |",
-    "",
-    "[Folio](https://example.com)",
-    "",
-    "[[Beta|Go to Beta]]",
-    "",
-    '<div align="center">centered text</div>',
-  ].join("\n")
+// Inline helpers --------------------------------------------------------------
+const text = (t, marks = []) => ({ type: "text", text: t, marks });
+const para = (content, attrs = {}) => ({ type: "paragraph", attrs, content });
+const heading = (level, t) => ({ type: "heading", attrs: { level }, content: [text(t)] });
+const listItem = (content) => ({ type: "listItem", content });
+
+addChapter("ch1", "Alpha", [
+  heading(1, "Alpha"),
+  para([
+    text("bold", [{ type: "bold" }]),
+    text(" "),
+    text("italic", [{ type: "italic" }]),
+    text(" "),
+    text("strike", [{ type: "strike" }]),
+    text(" "),
+    text("highlight", [{ type: "highlight" }]),
+    text(" "),
+    text("under", [{ type: "underline" }]),
+  ]),
+  para([
+    text("red", [{ type: "textColor", attrs: { color: "#e11d48" } }]),
+    text(" "),
+    text("marked", [{ type: "highlight", attrs: { color: "#fde047" } }]),
+  ]),
+  {
+    type: "bulletList",
+    content: [
+      listItem([para([text("bullet one")])]),
+      listItem([
+        para([text("bullet two")]),
+        {
+          type: "bulletList",
+          content: [listItem([para([text("nested bullet")])])],
+        },
+      ]),
+    ],
+  },
+  {
+    type: "orderedList",
+    content: [
+      listItem([para([text("numbered one")])]),
+      listItem([para([text("numbered two")])]),
+    ],
+  },
+  {
+    type: "blockquote",
+    attrs: { callout: "note" },
+    content: [
+      para([text("Callout title")], { class: "callout-title" }),
+      para([text("callout body")]),
+    ],
+  },
+  {
+    type: "blockquote",
+    content: [para([text("plain quote")])],
+  },
+  { type: "codeBlock", attrs: { language: "js" }, content: [text("const answer = 42;")] },
+  { type: "horizontalRule" },
+  {
+    type: "table",
+    content: [
+      {
+        type: "tableRow",
+        content: [
+          { type: "tableHeader", content: [para([text("Head A")])] },
+          { type: "tableHeader", content: [para([text("Head B")])] },
+        ],
+      },
+      {
+        type: "tableRow",
+        content: [
+          { type: "tableCell", content: [para([text("cell 1")])] },
+          { type: "tableCell", content: [para([text("cell 2")])] },
+        ],
+      },
+    ],
+  },
+  para([text("Folio", [{ type: "link", attrs: { href: "https://example.com" } }])]),
+  para([text("Go to Beta", [{ type: "link", attrs: { href: "folio:chapter/Beta" } }])]),
+  para([text("centered text")], { textAlign: "center" }),
+]);
+
+addChapter("ch2", "Beta", [para([text("This chapter has no heading of its own.")])]);
+addChapter("ch3", "Gamma", [
+  heading(1, "Gamma"),
+  heading(2, "Subsection"),
+  para([text("trailing paragraph")]),
+]);
+addChapter("ch4", "Empty", []);
+addChapter("ch5", "Unicode", [para([text("Café — naïve naïve 中文 📖")])]);
+
+// Real image file so the DOCX embedding path (ImageRun) is exercised: a
+// relative src must resolve against the book directory and the bytes survive.
+fs.mkdirSync(path.join(bookDir, "assets"), { recursive: true });
+fs.writeFileSync(
+  path.join(bookDir, "assets", "pic.png"),
+  Buffer.from("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==", "base64")
 );
-addChapter("ch2", "Beta", "This chapter has no heading of its own.");
-addChapter("ch3", "Gamma", `# Gamma\n\n## Subsection\n\ntrailing paragraph`);
-addChapter("ch4", "Empty", "");
-addChapter("ch5", "Unicode", "Café — naïve naïve 中文 📖");
+addChapter("ch6", "Pics", [{ type: "image", attrs: { src: "assets/pic.png", alt: "a picture" } }]);
 
 fs.writeFileSync(
   path.join(bookDir, "folio.json"),
   JSON.stringify({ app: "folio", version: 1, title: "Office Test Book", chapterOrder: order, chapters })
 );
 
-const origFiles = order.map((id) => chapters[id].file).map((f) => [f, fs.readFileSync(path.join(bookDir, f))]);
+const origFiles = order
+  .map((id) => chapters[id].file)
+  .map((f) => [f, fs.readFileSync(path.join(bookDir, f))]);
 const origManifest = fs.readFileSync(path.join(bookDir, "folio.json"));
 
 const docxBuf = await mod.buildDocx(bookDir);
@@ -113,11 +177,15 @@ const idxAlpha = docxText.indexOf("Alpha");
 const idxBeta = docxText.indexOf("Beta");
 const idxGamma = docxText.indexOf("Gamma");
 const idxUnicode = docxText.indexOf("Unicode");
+const idxPics = docxText.indexOf("Pics");
 check(
   "docx keeps chapter order",
-  idxAlpha >= 0 && idxAlpha < idxBeta && idxBeta < idxGamma && idxGamma < idxUnicode
+  idxAlpha >= 0 && idxAlpha < idxBeta && idxBeta < idxGamma && idxGamma < idxUnicode && idxUnicode < idxPics
 );
 
+const mediaFiles = Object.keys(docxZip.files).filter((f) => f.startsWith("word/media/"));
+check("docx embeds the image (no data loss)", mediaFiles.length >= 1);
+
 check("docx has bold", /<w:b\/>/.test(docxXml));
 check("docx has italic", /<w:i\/>/.test(docxXml));
 check("docx has strike", /<w:strike\/>/.test(docxXml));
@@ -140,8 +208,8 @@ check("docx has 1.7 line spacing", /<w:spacing[^>]*w:line="408"[^>]*w:lineRule="
 check("docx has blank-line paragraph spacing", /<w:spacing[^>]*w:after="408"/.test(docxXml));
 check("docx has chapter break before later chapters", (docxXml.match(/w:before="320"/g) || []).length >= 4);
 check("docx has callout shading", /w:fill="F5F2ED"/.test(docxXml));
-check("docx renders ==highlight== (no raw markup)", !docxText.includes("==highlight=="));
-check("docx renders **bold** (no raw markup)", !docxText.includes("**bold**"));
+check("docx renders highlight (no raw markup)", !docxText.includes("==highlight=="));
+check("docx renders bold (no raw markup)", !docxText.includes("**bold**"));
 check("docx resolves wikilink label", docxText.includes("Go to Beta"));
 check("docx has no raw wikilink brackets", !docxText.includes("[[Beta"));
 check("docx headingless chapter gets title", docxText.includes("Beta") && docxText.includes("no heading"));

tests/run-print-test.mjs

@@ -0,0 +1,145 @@
+// Standalone test for the native -> print HTML renderer (print-format.ts).
+// This is the path the PDF export uses (#printBook innerHTML). It bundles the
+// renderer module and verifies that chapter breaks become print sections and
+// that every rich-text feature survives the native -> HTML conversion.
+// Run with: node tests/run-print-test.mjs
+import esbuild from "esbuild";
+import fs from "fs";
+import os from "os";
+import path from "path";
+import url from "url";
+
+const out = path.resolve(`tests/.tmp-folio-print-${process.pid}.mjs`);
+await esbuild.build({
+  entryPoints: [path.resolve("src/renderer/print-format.ts")],
+  bundle: true,
+  platform: "node",
+  format: "esm",
+  external: ["electron"],
+  outfile: out,
+  write: true,
+  logLevel: "silent",
+});
+
+const mod = await import(url.pathToFileURL(out).href);
+const renderPrintChaptersNative = mod.renderPrintChaptersNative;
+
+let failures = 0;
+const check = (name, ok) => {
+  console.log(`${ok ? "PASS" : "FAIL"} ${name}`);
+  if (!ok) failures += 1;
+};
+
+// --- native document with chapter breaks + every formatting feature ---------
+const text = (t, marks = []) => ({ type: "text", text: t, marks });
+const para = (content, attrs = {}) => ({ type: "paragraph", attrs, content });
+const heading = (level, t) => ({ type: "heading", attrs: { level }, content: [text(t)] });
+const listItem = (content) => ({ type: "listItem", content });
+
+const doc = {
+  type: "doc",
+  content: [
+    { type: "chapterBreak", attrs: { chapterId: "c1", title: "One", first: true } },
+    heading(1, "One"),
+    para([
+      text("bold", [{ type: "bold" }]),
+      text(" "),
+      text("italic", [{ type: "italic" }]),
+      text(" "),
+      text("underline", [{ type: "underline" }]),
+      text(" "),
+      text("hl", [{ type: "highlight" }]),
+      text(" "),
+      text("red", [{ type: "textColor", attrs: { color: "#e11d48" } }]),
+      text(" "),
+      text("mk", [{ type: "highlight", attrs: { color: "#fde047" } }]),
+    ]),
+    para([text("center")], { textAlign: "center" }),
+    { type: "bulletList", content: [listItem([para([text("bullet one")])])] },
+    {
+      type: "orderedList",
+      content: [
+        listItem([para([text("numbered one")])]),
+        listItem([para([text("numbered two")])]),
+      ],
+    },
+    {
+      type: "taskList",
+      content: [
+        { type: "taskItem", attrs: { checked: true }, content: [para([text("done task")])] },
+        { type: "taskItem", attrs: { checked: false }, content: [para([text("todo task")])] },
+      ],
+    },
+    {
+      type: "blockquote",
+      attrs: { callout: "note" },
+      content: [
+        para([text("Callout title")], { class: "callout-title" }),
+        para([text("callout body")]),
+      ],
+    },
+    { type: "codeBlock", attrs: { language: "js" }, content: [text("const answer = 42;")] },
+    { type: "horizontalRule" },
+    {
+      type: "table",
+      content: [
+        {
+          type: "tableRow",
+          content: [
+            { type: "tableHeader", content: [para([text("Head A")])] },
+            { type: "tableHeader", content: [para([text("Head B")])] },
+          ],
+        },
+        {
+          type: "tableRow",
+          content: [
+            { type: "tableCell", content: [para([text("cell 1")])] },
+            { type: "tableCell", content: [para([text("cell 2")])] },
+          ],
+        },
+      ],
+    },
+    { type: "image", attrs: { src: "assets/pic.png", alt: "a picture" } },
+    para([text("Site", [{ type: "link", attrs: { href: "https://example.com" } }])]),
+    para([text("Go", [{ type: "link", attrs: { href: "folio:chapter/Two" } }])]),
+    { type: "chapterBreak", attrs: { chapterId: "c2", title: "Two", first: false } },
+    heading(1, "Two"),
+    para([text("second chapter body")]),
+  ],
+};
+
+const html = renderPrintChaptersNative(doc);
+
+check("has two print-chapter sections", (html.match(/<section class="print-chapter">/g) || []).length === 2);
+const iOne = html.indexOf("One");
+const iTwo = html.indexOf("Two");
+check("chapters appear in order", iOne >= 0 && iOne < iTwo);
+check("first section contains chapter one", html.indexOf("<section") < iOne && html.indexOf("second chapter body") > iOne);
+
+check("renders h1", /<h1>One<\/h1>/.test(html));
+check("renders bold", /<strong>bold<\/strong>/.test(html));
+check("renders italic", /<em>italic<\/em>/.test(html));
+check("renders underline", /<u>underline<\/u>/.test(html));
+check("renders highlight as mark", /<mark>hl<\/mark>/.test(html));
+check("renders text color span", /<span style="color:#e11d48">red<\/span>/.test(html));
+check("renders highlight color span", /<span style="background-color:#fde047">mk<\/span>/.test(html));
+check("renders centered paragraph", /<p style="text-align:center">center<\/p>/.test(html));
+check("renders bullet list", /<ul>[\s\S]*bullet one[\s\S]*<\/ul>/.test(html));
+check("renders ordered list", /<ol>[\s\S]*numbered one[\s\S]*numbered two[\s\S]*<\/ol>/.test(html));
+check("renders task list with checkboxes", html.includes("&#9746;") && html.includes("done task") && html.includes("&#9744;") && html.includes("todo task"));
+check("renders callout", /<div class="callout callout-note">.*<p class="callout-title">Callout title<\/p>/s.test(html));
+check("renders code block", /<pre><code>const answer = 42;<\/code><\/pre>/.test(html));
+check("renders horizontal rule", /<hr>/.test(html));
+check("renders table with header + cells", /<table class="folio-table">.*<th>Head A<\/th>.*<td>cell 1<\/td>.*<\/table>/s.test(html));
+check("renders image", /<img src="assets\/pic.png" alt="a picture">/.test(html));
+check("renders external link", /<a href="https:\/\/example.com">Site<\/a>/.test(html));
+check("renders wikilink as internal anchor", /<a href="folio:chapter\/Two" class="wikilink internal">Go<\/a>/.test(html));
+check("no raw wikilink brackets", !html.includes("[[Two"));
+
+fs.rmSync(out, { force: true });
+
+if (failures > 0) {
+  console.error(`\n${failures} check(s) failed.`);
+  process.exit(1);
+}
+console.log("\nAll print-format checks passed.");

tests/selftest-scenario.js

@@ -1,966 +0,0 @@
-/* Selftest scenario - runs inside the renderer via executeJavaScript.
-   Injected only when FOLIO_SELF_TEST=1. Exercises the full
-   renderer -> preload -> IPC -> chapters chain. */
-const BOOK_DIR = __BOOKDIR_VALUE__;
-const BOOK2_DIR = __BOOKDIR2_VALUE__;
-const BOOK3_DIR = __BOOKDIR3_VALUE__;
-(async () => {
-  const out = {};
-  try {
-    out.folioType = typeof window.folio;
-    out.recentsCount = (await window.folio.getRecents()).length;
-    out.openBook = await window.folio.openBookPath(BOOK_DIR);
-    out.metaTitle = (await window.folio.getBookMeta()).title;
-
-    const created = await window.folio.createChapter("Introduction");
-    out.created = created && !created.error ? { id: created.id, title: created.title } : created;
-    const cid = created.id;
-    out.contentEmpty = await window.folio.getChapterContent(cid);
-    out.listLen1 = (await window.folio.getChapterList()).length;
-
-    out.renamed = await window.folio.renameChapter(cid, "Intro");
-    const dup = await window.folio.duplicateChapter(cid);
-    out.dup = dup && !dup.error ? { id: dup.id, title: dup.title } : dup;
-    const did = dup.id;
-    out.listLen2 = (await window.folio.getChapterList()).length;
-
-    out.deleted = await window.folio.deleteChapter(cid);
-    const remaining = (await window.folio.getChapterList())[0];
-    out.listLen3 = (await window.folio.getChapterList()).length;
-
-    out.reorderOk = await window.folio.reorderChapters([remaining.id]);
-    out.reorderErr = await window.folio.reorderChapters(["bogus-id"]);
-
-    out.dupContent = await window.folio.getChapterContent(did);
-
-    // --- drag & drop reorder test ---
-    const a = (await window.folio.createChapter("Alpha")).id;
-    await new Promise((r) => setTimeout(r, 80));
-    const b = (await window.folio.createChapter("Bravo")).id;
-    await new Promise((r) => setTimeout(r, 80));
-    const c = (await window.folio.createChapter("Charlie")).id;
-    await new Promise((r) => setTimeout(r, 200));
-    const orderBefore = (await window.folio.getBookMeta()).chapterOrder;
-    out.orderBeforeDnD = orderBefore;
-    const rows = document.getElementById("chapterList").querySelectorAll(".chapter-row");
-    out.dndRowCount = rows.length;
-    const draggedId = rows[0].dataset.id;
-    const targetId = rows[2].dataset.id;
-    const dt = new DataTransfer();
-    rows[0].dispatchEvent(new DragEvent("dragstart", { dataTransfer: dt, bubbles: true }));
-    rows[2].dispatchEvent(new DragEvent("dragover", { dataTransfer: dt, bubbles: true }));
-    rows[2].dispatchEvent(new DragEvent("drop", { dataTransfer: dt, bubbles: true }));
-    rows[0].dispatchEvent(new DragEvent("dragend", { dataTransfer: dt, bubbles: true }));
-    await new Promise((r) => setTimeout(r, 250));
-    const orderAfter = (await window.folio.getBookMeta()).chapterOrder;
-    out.orderAfterDnD = orderAfter;
-    out.dndMoved =
-      orderAfter[0] === orderBefore[1] &&
-      orderAfter[2] === orderBefore[0] &&
-      orderAfter[3] === orderBefore[3];
-
-    // keyboard reorder: select first visible row, Alt+ArrowDown moves it down
-    const fresh1 = document.getElementById("chapterList").querySelectorAll(".chapter-row");
-    fresh1[0].dispatchEvent(new MouseEvent("click", { bubbles: true }));
-    await new Promise((r) => setTimeout(r, 120));
-    const fresh2 = document.getElementById("chapterList").querySelectorAll(".chapter-row");
-    fresh2[0].focus();
-    fresh2[0].dispatchEvent(new KeyboardEvent("keydown", { key: "ArrowDown", altKey: true, bubbles: true }));
-    await new Promise((r) => setTimeout(r, 250));
-    const orderKb = (await window.folio.getBookMeta()).chapterOrder;
-    out.orderAfterKb = orderKb;
-    out.kbMoved = orderKb[0] === orderAfter[1] && orderKb[1] === orderAfter[0];
-
-    // UI-driven chapter creation via the in-app modal (window.prompt is unsupported)
-    const countBefore = (await window.folio.getBookMeta()).chapterOrder.length;
-    document.getElementById("addChapterBtn").click();
-    await new Promise((r) => setTimeout(r, 80));
-    const modalInput = document.getElementById("modalInput");
-    out.modalShown = !!modalInput && !document.getElementById("modalBackdrop").classList.contains("hidden");
-    modalInput.value = "Via Modal";
-    document.getElementById("modalOk").click();
-    await new Promise((r) => setTimeout(r, 300));
-    const metaAfterUi = await window.folio.getBookMeta();
-    out.uiCreated = metaAfterUi.chapterOrder.length === countBefore + 1 &&
-      Object.values(metaAfterUi.chapters).some((c) => c.title === "Via Modal");
-
-    // CodeMirror editor: typing, cursor/selection, autosave persistence
-    const cm = window.__folioEditor;
-    out.hasEditor = !!cm;
-    out.editorLoaded = cm ? cm.state.doc.toString() : null;
-    if (cm) {
-      cm.dispatch({
-        changes: {
-          from: 0,
-          to: cm.state.doc.length,
-          insert: "# Heading One\n\n**bold** and *italic* text\n\n- bullet one\n- bullet two\n\n> quoted line\n\n[link](https://example.com) and `inline code`\n\n---",
-        },
-      });
-      cm.dispatch({ selection: { anchor: cm.state.doc.length } });
-    }
-    await new Promise((r) => setTimeout(r, 1200));
-    out.editorDocAfterType = cm ? cm.state.doc.toString() : null;
-    const typedId = metaAfterUi.chapterOrder[metaAfterUi.chapterOrder.length - 1];
-    const typedContent = await window.folio.getChapterContent(typedId);
-    out.editorAutosaved =
-      !!cm &&
-      cm.state.doc.toString().includes("**bold** and *italic*") &&
-      typedContent.includes("# Heading One") &&
-      typedContent.includes("- bullet two") &&
-      typedContent.includes("> quoted line") &&
-      typedContent.includes("[link](https://example.com)") &&
-      typedContent.includes("`inline code`");
-
-    // --- formatting toolbar + keyboard shortcuts ---
-    if (cm) {
-      cm.dispatch({ changes: { from: 0, to: cm.state.doc.length, insert: "" }, selection: { anchor: 0 } });
-      cm.focus();
-      cm.dispatch({ changes: { from: 0, to: 0, insert: "Hello World" }, selection: { anchor: 0, head: 5 } });
-
-      document.querySelector('[data-cmd="bold"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.toolbarBoldOk = cm.state.doc.toString() === "**Hello** World";
-      out.focusAfterBold = document.activeElement === cm.contentDOM;
-
-      cm.dispatch({ selection: { anchor: 10, head: 15 } }); // "World"
-      cm.contentDOM.dispatchEvent(
-        new KeyboardEvent("keydown", { key: "b", ctrlKey: true, bubbles: true, cancelable: true })
-      );
-      await new Promise((r) => setTimeout(r, 50));
-      out.shortcutBoldOk = cm.state.doc.toString() === "**Hello** **World**";
-
-      const headingSel = document.getElementById("headingSelect");
-      headingSel.value = "2";
-      headingSel.dispatchEvent(new Event("change", { bubbles: true }));
-      await new Promise((r) => setTimeout(r, 50));
-      out.headingOk = cm.state.doc.toString().startsWith("## ");
-
-      document.querySelector('[data-cmd="undo"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.undoOk = cm.state.doc.toString() === "**Hello** **World**";
-
-      document.querySelector('[data-cmd="redo"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.redoOk = cm.state.doc.toString().startsWith("## ");
-
-      cm.dispatch({ selection: { anchor: 15, head: 20 } }); // "World"
-      cm.contentDOM.dispatchEvent(
-        new KeyboardEvent("keydown", {
-          key: "s",
-          ctrlKey: true,
-          shiftKey: true,
-          bubbles: true,
-          cancelable: true,
-        })
-      );
-      await new Promise((r) => setTimeout(r, 50));
-      out.strikeShortcutOk = cm.state.doc.toString().includes("~~World~~");
-
-      cm.dispatch({
-        changes: { from: 0, to: 0, insert: "line one\nline two\n" },
-        selection: { anchor: 0, head: 16 },
-      });
-      document.querySelector('[data-cmd="codeblock"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.fencedCodeOk = cm.state.doc.toString().startsWith("```\nline one\nline two\n```");
-
-      // underline shortcut (Ctrl+U)
-      cm.dispatch({ changes: { from: 0, to: cm.state.doc.length, insert: "" } });
-      cm.dispatch({ changes: { from: 0, to: 0, insert: "Under me" }, selection: { anchor: 0, head: 5 } });
-      cm.contentDOM.dispatchEvent(
-        new KeyboardEvent("keydown", { key: "u", ctrlKey: true, bubbles: true, cancelable: true })
-      );
-      await new Promise((r) => setTimeout(r, 50));
-      out.underlineOk = cm.state.doc.toString().startsWith("<u>Under</u>");
-
-      // task list via toolbar
-      cm.dispatch({ changes: { from: 0, to: cm.state.doc.length, insert: "" } });
-      cm.dispatch({ changes: { from: 0, to: 0, insert: "task one\ntask two" }, selection: { anchor: 0, head: 8 } });
-      document.querySelector('[data-cmd="checklist"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.checklistOk = cm.state.doc.toString().startsWith("- [ ] task one");
-
-      // highlight via toolbar
-      cm.dispatch({ changes: { from: 0, to: cm.state.doc.length, insert: "" } });
-      cm.dispatch({ changes: { from: 0, to: 0, insert: "cell text" }, selection: { anchor: 0, head: 4 } });
-      document.querySelector('[data-cmd="highlight"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.highlightOk = cm.state.doc.toString().startsWith("==cell==");
-
-      // table via toolbar dropdown config
-      cm.dispatch({ changes: { from: 0, to: cm.state.doc.length, insert: "" } });
-      document.getElementById("tableRows").value = "3";
-      document.getElementById("tableCols").value = "2";
-      document.querySelector('[data-action="table"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.tableOk = cm.state.doc.toString().startsWith("| Col 1 | Col 2 |\n| --- | --- |");
-
-      // format painter
-      cm.dispatch({ changes: { from: 0, to: cm.state.doc.length, insert: "" } });
-      cm.dispatch({ changes: { from: 0, to: 0, insert: "**src** dst" }, selection: { anchor: 3, head: 3 } });
-      document.querySelector('[data-cmd="painter"]').click();
-      cm.dispatch({ selection: { anchor: 8, head: 11 } });
-      document.querySelector('[data-cmd="painter"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.painterOk = cm.state.doc.toString() === "**src** **dst**";
-
-      // text color via the toolbar dropdown.
-      cm.dispatch({ changes: { from: 0, to: cm.state.doc.length, insert: "" } });
-      cm.dispatch({ changes: { from: 0, to: 0, insert: "color me" }, selection: { anchor: 0, head: 5 } });
-      cm.focus();
-      const colorToggle = document.querySelector('[data-dropdown="colorMenu"]');
-      colorToggle?.click();
-      await new Promise((r) => setTimeout(r, 50));
-      const colorMenuEl = document.getElementById("colorMenu");
-      const colorRect = colorMenuEl?.getBoundingClientRect();
-      out.colorMenuOpens =
-        !!colorRect && !colorMenuEl?.classList.contains("hidden") && colorRect.bottom <= window.innerHeight + 1;
-      // the dropdown is pinned to the viewport, so it must stay on screen even
-      // though the toolbar itself is a horizontal scroll container
-      out.colorMenuOnScreen = !!colorRect && colorRect.top >= 0 && colorRect.bottom <= window.innerHeight;
-      document.querySelector('[data-cmd="color:#e11d48"]').click();
-      await new Promise((r) => setTimeout(r, 50));
-      out.colorApplied = cm.state.doc.toString() === '<span style="color:#e11d48">color</span> me';
-
-      // custom color picker works
-      cm.dispatch({ changes: { from: 0, to: cm.state.doc.length, insert: "" } });
-      cm.dispatch({ changes: { from: 0, to: 0, insert: "pick me" }, selection: { anchor: 0, head: 4 } });
-      cm.focus();
-      colorToggle?.click();
-      await new Promise((r) => setTimeout(r, 50));
-      const customInput = document.getElementById("customTextColor");
-      customInput.value = "#0066cc";
-      customInput.dispatchEvent(new Event("change", { bubbles: true }));
-      await new Promise((r) => setTimeout(r, 50));
-      out.customColorApplied = cm.state.doc.toString() === '<span style="color:#0066cc">pick</span> me';
-
-      // leave some formatted content on disk for the autosave check
-      cm.dispatch({
-        changes: { from: 0, to: cm.state.doc.length, insert: "**Hello** World" },
-        selection: { anchor: 0 },
-      });
-      await new Promise((r) => setTimeout(r, 1200)); // wait for autosave debounce
-      out.formattingAutosaved =
-        (await window.folio.getChapterContent(typedId)).includes("**Hello**");
-    }
-
-    // --- full book view (fresh second book with known chapter contents) ---
-    await window.folio.openBookPath(BOOK2_DIR);
-    await new Promise((r) => setTimeout(r, 400));
-    const fb = window.__folioFullBookEditor;
-    const alphaId = (await window.folio.createChapter("Alpha")).id;
-    const betaId = (await window.folio.createChapter("Beta")).id;
-    const gammaId = (await window.folio.createChapter("Gamma")).id;
-    await new Promise((r) => setTimeout(r, 300));
-    await window.folio.saveChapter(alphaId, "# Alpha\n\nAlpha body text");
-    await window.folio.saveChapter(betaId, "Beta body without heading");
-    await window.folio.saveChapter(gammaId, "# Gamma's Own Title\n\nGamma text");
-    await new Promise((r) => setTimeout(r, 300));
-
-    document.getElementById("fullBookBtn").click();
-    await new Promise((r) => setTimeout(r, 300));
-
-    const expectedAssembled =
-      "# Alpha\n\nAlpha body text\n\n# Beta\n\nBeta body without heading\n\n# Gamma\n\n# Gamma's Own Title\n\nGamma text";
-    out.fullBookShown =
-      !document.getElementById("fullBookView").classList.contains("hidden") &&
-      document.getElementById("chapterView").classList.contains("hidden") &&
-      document.getElementById("fullBookBtn").classList.contains("active") &&
-      !document.getElementById("fullBookNav").classList.contains("hidden");
-    const assembled = fb.state.doc.toString();
-    out.assembled = assembled;
-    out.assembledOk = assembled === expectedAssembled;
-    const words = expectedAssembled.trim().split(/\s+/).length;
-    const statsEl = document.getElementById("fullBookStats");
-    out.fullBookStatsText = statsEl.textContent;
-    out.fullBookStatsOk =
-      statsEl.textContent === `words: ${words} · chars: ${expectedAssembled.length}`;
-
-    // --- chapter page breaks in Full Book ---
-    // Each chapter after the first gets a "chapter-break" marker on its first
-    // rendered line (a CSS border on screen, break-before: page when printed).
-    // The first chapter must never be marked, so no blank page precedes it.
-    const chapterBreakLines = () =>
-      Array.from(document.querySelectorAll("#fullBookHost .cm-line.chapter-break"));
-    const allContentLines = () =>
-      Array.from(document.querySelectorAll("#fullBookHost .cm-content .cm-line"));
-    const fbBreaks = chapterBreakLines();
-    const firstLine = allContentLines()[0];
-    out.chapterBreakCount = fbBreaks.length;
-    out.chapterBreakCountOk = fbBreaks.length === 2; // 3 chapters -> 2 breaks
-    out.firstChapterUnmarked = !!firstLine && !firstLine.classList.contains("chapter-break");
-    out.breaksAtChapterStarts =
-      fbBreaks.length === 2 &&
-      fbBreaks.every((el) => {
-        const t = el.textContent;
-        return t.startsWith("# Beta") || t.startsWith("# Gamma");
-      });
-
-    // print rules must be present in the stylesheet (fetch the raw CSS because
-    // Chromium's CSSOM normalizes the page-break-before alias into break-before)
-    const rawCss = await (await fetch("./index.css")).text();
-    out.printBreakRule = /break-before\s*:\s*page/.test(rawCss);
-    out.printBreakFallback = /page-break-before\s*:\s*always/.test(rawCss);
-    out.printBreakScoped = /\.print-chapter\s*{[^}]*break-before\s*:\s*page/.test(rawCss);
-
-    document.getElementById("copyAllBtn").click();
-    await new Promise((r) => setTimeout(r, 200));
-    const clip = await window.folio.getClipboardText();
-    out.clipboardLen = clip.length;
-    out.copyAllOk = clip === expectedAssembled;
-    out.copyStatusShown = document.getElementById("fullBookStatus").textContent === "Full book copied";
-
-    // Ctrl+A (routed through the renderer listener) selects the whole read-only doc
-    fb.focus();
-    fb.contentDOM.dispatchEvent(
-      new KeyboardEvent("keydown", { key: "a", ctrlKey: true, bubbles: true, cancelable: true })
-    );
-    const sel = fb.state.selection.main;
-    out.fullBookSelectAllOk =
-      fb.state.doc.length > 0 && sel.from === 0 && sel.to === fb.state.doc.length;
-
-    // back to normal chapter editing still works
-    document.querySelector("#chapterList .chapter-row").click();
-    await new Promise((r) => setTimeout(r, 250));
-    out.backToChapterOk =
-      document.getElementById("fullBookView").classList.contains("hidden") &&
-      !document.getElementById("chapterView").classList.contains("hidden") &&
-      !document.getElementById("fullBookBtn").classList.contains("active");
-
-    // --- requirement matrix: reorder, persistence, edit ops reflect in Full Book ---
-    const rowFor = (id) =>
-      Array.from(document.querySelectorAll("#chapterList .chapter-row")).find((r) => r.dataset.id === id);
-    const moveUp = async (id) => {
-      rowFor(id).dispatchEvent(
-        new KeyboardEvent("keydown", { key: "ArrowUp", altKey: true, bubbles: true })
-      );
-      await new Promise((r) => setTimeout(r, 250));
-    };
-
-    // current order: [Alpha, Beta, Gamma]; move Gamma to front -> [Gamma, Alpha, Beta]
-    rowFor(gammaId).click();
-    await new Promise((r) => setTimeout(r, 200));
-    await moveUp(gammaId);
-    await moveUp(gammaId);
-    const orderReordered = (await window.folio.getBookMeta()).chapterOrder;
-    out.orderReordered = orderReordered;
-    out.reorderOk =
-      orderReordered[0] === gammaId && orderReordered[1] === alphaId && orderReordered[2] === betaId;
-
-    // Full Book follows the new chapter order and keeps every chapter's content
-    document.getElementById("fullBookBtn").click();
-    await new Promise((r) => setTimeout(r, 300));
-    const assembledGAB = fb.state.doc.toString();
-    out.fbAfterReorder = assembledGAB;
-    out.fbAfterReorderOk =
-      assembledGAB.startsWith("# Gamma\n\n# Gamma's Own Title") &&
-      assembledGAB.indexOf("# Alpha") > assembledGAB.indexOf("# Gamma") &&
-      assembledGAB.indexOf("# Beta") > assembledGAB.indexOf("# Alpha");
-    out.fbHasAllContent =
-      assembledGAB.includes("Gamma text") &&
-      assembledGAB.includes("Alpha body text") &&
-      assembledGAB.includes("Beta body without heading");
-
-    // chapter breaks follow the reordered manuscript: still exactly 2 breaks,
-    // now marking Alpha and Beta (Gamma is first, so it stays unmarked)
-    const fbBreaksReordered = chapterBreakLines();
-    out.fbBreaksAfterReorder = fbBreaksReordered.map((el) => el.textContent);
-    out.fbBreakAfterReorderOk =
-      fbBreaksReordered.length === 2 &&
-      fbBreaksReordered.every((el) => {
-        const t = el.textContent;
-        return t.startsWith("# Alpha") || t.startsWith("# Beta");
-      }) &&
-      !allContentLines()[0].classList.contains("chapter-break");
-
-    // switching between an individual chapter and Full Book never shows stale data
-    document.querySelector("#chapterList .chapter-row").click();
-    await new Promise((r) => setTimeout(r, 200));
-    document.getElementById("fullBookBtn").click();
-    await new Promise((r) => setTimeout(r, 300));
-    out.fbNoStale = fb.state.doc.toString() === assembledGAB;
-
-    // the Full Book pane must be a bounded flex column whose editor can be
-    // scrolled, so every chapter is actually reachable on screen (a block
-    // layout here clips the manuscript to the first screenful)
-    const fbViewEl = document.getElementById("fullBookView");
-    const fbHost = document.getElementById("fullBookHost");
-    const fbEditor = fbHost.querySelector(".cm-editor");
-    const vs = getComputedStyle(fbViewEl);
-    out.fbViewDisplay = vs.display;
-    out.fbViewDir = vs.flexDirection;
-    out.fbEditorHeight = Math.round(fbEditor.getBoundingClientRect().height);
-    out.fbViewportHeight = window.innerHeight;
-    out.fbLayoutOk =
-      vs.display === "flex" &&
-      vs.flexDirection === "column" &&
-      fbEditor.getBoundingClientRect().height <= window.innerHeight;
-
-    // closing and reopening the book preserves the chapter order
-    await window.folio.openBookPath(BOOK2_DIR);
-    await new Promise((r) => setTimeout(r, 400));
-    const orderReopened = (await window.folio.getBookMeta()).chapterOrder;
-    out.orderAfterReopen = orderReopened;
-    out.reopenPersists = JSON.stringify(orderReopened) === JSON.stringify(orderReordered);
-
-    // deleting a chapter updates the sidebar and Full Book
-    rowFor(alphaId).querySelector('[data-act="del"]').click();
-    await new Promise((r) => setTimeout(r, 150));
-    document.getElementById("modalOk").click();
-    await new Promise((r) => setTimeout(r, 300));
-    out.orderAfterDelete = (await window.folio.getBookMeta()).chapterOrder;
-    out.deleteOk = !(await window.folio.getBookMeta()).chapterOrder.includes(alphaId);
-    document.getElementById("fullBookBtn").click();
-    await new Promise((r) => setTimeout(r, 300));
-    const assembledAfterDelete = fb.state.doc.toString();
-    out.fbAfterDelete = assembledAfterDelete;
-    out.fbAfterDeleteOk =
-      !assembledAfterDelete.includes("Alpha body text") && assembledAfterDelete.includes("Gamma text");
-
-    // renaming a chapter updates its Full Book heading
-    rowFor(betaId).querySelector('[data-act="rename"]').click();
-    await new Promise((r) => setTimeout(r, 150));
-    document.getElementById("modalInput").value = "Beta Renamed";
-    document.getElementById("modalOk").click();
-    await new Promise((r) => setTimeout(r, 300));
-    const assembledAfterRename = fb.state.doc.toString();
-    out.fbAfterRename = assembledAfterRename;
-    out.fbAfterRenameOk =
-      assembledAfterRename.includes("# Beta Renamed") &&
-      !assembledAfterRename.includes("# Beta\n\nBeta body without heading");
-
-    // a newly created empty chapter appears in Full Book with just its heading
-    const emptyId = (await window.folio.createChapter("Empty")).id;
-    await new Promise((r) => setTimeout(r, 300));
-    document.getElementById("fullBookBtn").click();
-    await new Promise((r) => setTimeout(r, 300));
-    const assembledWithEmpty = fb.state.doc.toString();
-    out.fbWithEmpty = assembledWithEmpty;
-    out.fbEmptyOk = assembledWithEmpty.includes("# Empty") && assembledWithEmpty.includes("Beta Renamed");
-
-    // --- Export of the Full Book (PDF / DOCX / ODT) ---
-    // The e2e harness sets FOLIO_TEST_PDF/DOCX/ODT, so the main process skips
-    // the native save dialog and writes to those paths, returning the byte
-    // count and whether the buffer starts with the right magic number. The
-    // Full Book view is on screen here, so the PDF is the assembled manuscript
-    // (the print stylesheet hides all app chrome).
-    const exportMenuToggle = document.getElementById("exportMenuToggle");
-    const exportMenu = document.getElementById("exportMenu");
-    out.exportMenuPresent = !!exportMenuToggle && !!exportMenu;
-    out.pdfExportPdfVisible = !document.getElementById("fullBookView").classList.contains("hidden");
-    exportMenuToggle.click();
-    await new Promise((r) => setTimeout(r, 50));
-    out.exportMenuOpened = !exportMenu.classList.contains("hidden");
-    const pdfItem = exportMenu.querySelector('[data-export="pdf"]');
-    out.pdfItemPresent = !!pdfItem;
-    pdfItem.click();
-    await new Promise((r) => setTimeout(r, 2500));
-    out.pdfStatusShown = document
-      .getElementById("fullBookStatus")
-      .textContent.startsWith("PDF saved to");
-    const pdfRes = await window.folio.exportPdf();
-    out.pdfExport =
-      pdfRes && "filePath" in pdfRes
-        ? { filePath: pdfRes.filePath, bytes: pdfRes.bytes, pdfOk: pdfRes.pdfOk }
-        : pdfRes;
-    out.pdfExportOk =
-      !!pdfRes &&
-      !("error" in pdfRes) &&
-      "filePath" in pdfRes &&
-      pdfRes.filePath.endsWith(".pdf") &&
-      typeof pdfRes.bytes === "number" &&
-      pdfRes.bytes > 500 &&
-      pdfRes.pdfOk === true;
-
-    // The printed book comes from the plain-HTML #printBook container (the
-    // print stylesheet hides the whole app and shows #printBook instead), so
-    // the PDF can never be limited to the CodeMirror viewport. Verify the
-    // container is hidden on screen and carries every chapter.
-    const printBookEl = document.getElementById("printBook");
-    out.printBookHiddenOnScreen = getComputedStyle(printBookEl).display === "none";
-    const printChapters = () =>
-      Array.from(document.querySelectorAll("#printBook .print-chapter"));
-    const pcsAtSmallBook = printChapters();
-    out.printBookChapterCount = pcsAtSmallBook.length;
-    out.printBookHasAllChapters =
-      pcsAtSmallBook.length === 3 &&
-      pcsAtSmallBook.some((s) => s.textContent.includes("Gamma text")) &&
-      pcsAtSmallBook.some((s) => s.textContent.includes("Beta body without heading")) &&
-      pcsAtSmallBook.some((s) => s.querySelector("h1")?.textContent === "Empty");
-
-    // Long book: every line must reach the print DOM — the guard against the
-    // "PDF does not show the full book" bug where a long manuscript was cut
-    // off after the first screenful.
-    const longLines = Array.from(
-      { length: 1500 },
-      (_, i) => `Line ${i} of a very long chapter that must all reach the printed book.`
-    );
-    const veryLongId = (await window.folio.createChapter("Very Long")).id;
-    await window.folio.saveChapter(veryLongId, longLines.join("\n"));
-    await new Promise((r) => setTimeout(r, 500));
-    document.getElementById("fullBookBtn").click();
-    await new Promise((r) => setTimeout(r, 400));
-    const printBookText = printBookEl.textContent;
-    out.printBookHasFirstLongLine = printBookText.includes("Line 0 of a very long chapter");
-    out.printBookHasLastLongLine = printBookText.includes("Line 1499 of a very long chapter");
-    out.printBookLongChapterCount = printChapters().length;
-    out.printBookLongFull =
-      out.printBookHasFirstLongLine &&
-      out.printBookHasLastLongLine &&
-      printChapters().length === 4;
-
-    const pdfLongRes = await window.folio.exportPdf();
-    out.pdfLongExport =
-      pdfLongRes && "filePath" in pdfLongRes
-        ? { filePath: pdfLongRes.filePath, bytes: pdfLongRes.bytes, pdfOk: pdfLongRes.pdfOk }
-        : pdfLongRes;
-    out.pdfLongExportOk =
-      !!pdfLongRes &&
-      !("error" in pdfLongRes) &&
-      "filePath" in pdfLongRes &&
-      pdfLongRes.bytes > pdfRes.bytes * 2 &&
-      pdfLongRes.pdfOk === true;
-
-    // DOCX export: main process assembles the manuscript from the chapter
-    // files (all four chapters, including the very long one), writes a ZIP
-    // (PK magic) to FOLIO_TEST_DOCX, and reports its size. The deep content
-    // checks live in tests/run-office-export-test.mjs; here we verify the
-    // end-to-end IPC path, extension, magic number, and the status notice.
-    const docxRes = await window.folio.exportDocx();
-    out.docxExport =
-      docxRes && "filePath" in docxRes
-        ? { filePath: docxRes.filePath, bytes: docxRes.bytes, docxOk: docxRes.docxOk }
-        : docxRes;
-    out.docxExportOk =
-      !!docxRes &&
-      !("error" in docxRes) &&
-      "filePath" in docxRes &&
-      docxRes.filePath.endsWith(".docx") &&
-      typeof docxRes.bytes === "number" &&
-      docxRes.bytes > 1000 &&
-      docxRes.docxOk === true;
-
-    const odtRes = await window.folio.exportOdt();
-    out.odtExport =
-      odtRes && "filePath" in odtRes
-        ? { filePath: odtRes.filePath, bytes: odtRes.bytes, odtOk: odtRes.odtOk }
-        : odtRes;
-    out.odtExportOk =
-      !!odtRes &&
-      !("error" in odtRes) &&
-      "filePath" in odtRes &&
-      odtRes.filePath.endsWith(".odt") &&
-      typeof odtRes.bytes === "number" &&
-      odtRes.bytes > 1000 &&
-      odtRes.odtOk === true;
-
-    // Formatting must survive into the printed book: markdown-it is configured
-    // to pass through the toolbar's HTML (<u>, <span style=...>, <div>),
-    // ==highlight== becomes <mark>, callouts become styled divs, and
-    // wikilinks resolve to links — none of them may show up as raw source.
-    const fmtId = (await window.folio.createChapter("Formatting")).id;
-    await window.folio.saveChapter(
-      fmtId,
-      [
-        "**bold** *italic* ~~strike~~ ==highlight== <u>under</u>",
-        '<span style="color:#e11d48">red</span> <span style="background-color:#fde047">marked</span>',
-        "",
-        "> [!note] Callout title",
-        "> callout body",
-        "",
-        "[[Beta Renamed]]",
-      ].join("\n")
-    );
-    await new Promise((r) => setTimeout(r, 500));
-    document.getElementById("fullBookBtn").click();
-    await new Promise((r) => setTimeout(r, 400));
-    const pbInner = document.getElementById("printBook").innerHTML;
-    const pbText = document.getElementById("printBook").textContent;
-    out.printFmtBold = /<strong>bold<\/strong>/.test(pbInner);
-    out.printFmtMark = /<mark>highlight<\/mark>/.test(pbInner);
-    out.printFmtUnderline = /<u>under<\/u>/.test(pbInner);
-    out.printFmtColor = /<span style="color:#e11d48">red<\/span>/.test(pbInner);
-    out.printFmtNoRawEq = !pbText.includes("==highlight==");
-    out.printFmtCallout = /class="callout callout-note"/.test(pbInner);
-    out.printFmtNoRawCallout = !pbText.includes("[!note]");
-    out.printFmtWikilink = /class="wikilink internal"/.test(pbInner);
-    out.printFmtNoRawWikilink = !pbText.includes("[[Beta Renamed]]");
-    out.printFmtOk =
-      out.printFmtBold &&
-      out.printFmtMark &&
-      out.printFmtUnderline &&
-      out.printFmtColor &&
-      out.printFmtNoRawEq &&
-      out.printFmtCallout &&
-      out.printFmtNoRawCallout &&
-      out.printFmtWikilink &&
-      out.printFmtNoRawWikilink;
-
-    // --- chapter navigation inside Full Book (third book: One/Two/Three/Four) ---
-    // Four chapters, each taller than the viewport, so every jump target lands
-    // its own heading near the top of the Full Book viewport.
-    await window.folio.openBookPath(BOOK3_DIR);
-    await new Promise((r) => setTimeout(r, 400));
-    const navBook = window.__folioFullBookEditor;
-    const navViewEl = document.getElementById("fullBookView");
-    const navSel = document.getElementById("fbChapterSelect");
-    const navPrev = document.getElementById("fbPrevBtn");
-    const navNext = document.getElementById("fbNextBtn");
-    document.getElementById("fullBookBtn").click();
-    await new Promise((r) => setTimeout(r, 300));
-
-    const navOptions = () => Array.from(navSel.options).map((o) => o.textContent);
-    const navDocStarts = () => {
-      const doc = navBook.state.doc.toString();
-      return ["One", "Two", "Three", "Four"].map((t) => doc.indexOf("# " + t));
-    };
-    // How far (px) the given chapter's heading sits below the top of the Full
-    // Book viewport. The jump is considered correct when it is near the top.
-    const chapterTopY = (title) => {
-      const doc = navBook.state.doc.toString();
-      const start = doc.indexOf("# " + title);
-      if (start < 0) return -1;
-      const rect = navBook.scrollDOM.getBoundingClientRect();
-      const c = navBook.coordsAtPos(start);
-      if (!c) return -1;
-      return c.top - rect.top;
-    };
-    const navTopChapter = () => {
-      const scroller = navBook.scrollDOM;
-      const rect = scroller.getBoundingClientRect();
-      const pos = navBook.posAtCoords({ x: rect.left + 4, y: rect.top + 30 });
-      if (pos === null || pos === undefined) return -1;
-      const starts = navDocStarts();
-      let idx = 0;
-      for (let i = 0; i < starts.length; i++) {
-        if (starts[i] >= 0 && starts[i] <= pos) idx = i;
-        else break;
-      }
-      return idx;
-    };
-    const navTopLine = () => {
-      const scroller = navBook.scrollDOM;
-      const rect = scroller.getBoundingClientRect();
-      const pos = navBook.posAtCoords({ x: rect.left + 4, y: rect.top + 30 });
-      if (pos === null || pos === undefined) return "";
-      return navBook.state.doc.lineAt(pos).text;
-    };
-    const navSnap = () => ({
-      value: navSel.value,
-      prevDisabled: navPrev.disabled,
-      nextDisabled: navNext.disabled,
-      topChapter: navTopChapter(),
-      topLine: navTopLine(),
-      fullBookVisible:
-        !navViewEl.classList.contains("hidden") &&
-        document.getElementById("chapterView").classList.contains("hidden"),
-    });
-    const navWait = (ms) => new Promise((r) => setTimeout(r, ms));
-
-    // 1. Full Book opens at Chapter One; Previous disabled.
-    const navStart = navSnap();
-    out.navOptions = navOptions();
-    out.navOptionsOk =
-      JSON.stringify(out.navOptions) === JSON.stringify(["One", "Two", "Three", "Four"]);
-    out.navOpenAtOne = navStart;
-    out.navOpenAtOneOk =
-      navStart.value === "ch1" &&
-      navStart.prevDisabled &&
-      !navStart.nextDisabled &&
-      navStart.fullBookVisible &&
-      navStart.topChapter === 0;
-
-    // 2. Next -> Chapter Two.
-    navNext.click();
-    await navWait(300);
-    const navTwo = navSnap();
-    out.navNextToTwo = navTwo;
-    out.navNextToTwoOk =
-      navTwo.value === "ch2" &&
-      !navTwo.prevDisabled &&
-      !navTwo.nextDisabled &&
-      navTwo.fullBookVisible &&
-      navTwo.topChapter === 1 &&
-      chapterTopY("Two") >= 0 &&
-      chapterTopY("Two") < 200;
-
-    // 3. Next -> Chapter Three.
-    navNext.click();
-    await navWait(300);
-    const navThree = navSnap();
-    out.navNextToThree = navThree;
-    out.navNextToThreeOk =
-      navThree.value === "ch3" &&
-      navThree.fullBookVisible &&
-      navThree.topChapter === 2 &&
-      chapterTopY("Three") >= 0 &&
-      chapterTopY("Three") < 200;
-
-    // 4. Previous -> back to Chapter Two.
-    navPrev.click();
-    await navWait(300);
-    const navBackTwo = navSnap();
-    out.navPrevToTwo = navBackTwo;
-    out.navPrevToTwoOk =
-      navBackTwo.value === "ch2" &&
-      navBackTwo.topChapter === 1 &&
-      chapterTopY("Two") >= 0 &&
-      chapterTopY("Two") < 200;
-
-    // 5. Dropdown -> Chapter Four (Next disabled at the last chapter).
-    navSel.value = "ch4";
-    navSel.dispatchEvent(new Event("change", { bubbles: true }));
-    await navWait(300);
-    const navFour = navSnap();
-    out.navDropToFour = navFour;
-    out.navDropToFourOk =
-      navFour.value === "ch4" &&
-      navFour.nextDisabled &&
-      navFour.fullBookVisible &&
-      chapterTopY("Four") >= 0 &&
-      chapterTopY("Four") < 200;
-
-    // 6. Manual scrolling updates the selector: scroll to the very bottom
-    // (last chapter) and to the very top (first chapter).
-    navBook.scrollDOM.scrollTop = navBook.scrollDOM.scrollHeight;
-    navBook.scrollDOM.dispatchEvent(new Event("scroll"));
-    await navWait(250);
-    const navScrolledBottom = navSnap();
-    out.navScrollBottomTracks =
-      navScrolledBottom.value === "ch4" && navScrolledBottom.nextDisabled;
-    navBook.scrollDOM.scrollTop = 0;
-    navBook.scrollDOM.dispatchEvent(new Event("scroll"));
-    await navWait(250);
-    const navScrolledTop = navSnap();
-    out.navScrollTopTracks = navScrolledTop.value === "ch1" && navScrolledTop.prevDisabled;
-
-    // 7. Reordering chapters in the sidebar must be reflected immediately, even
-    // while Full Book stays open (no restart). Drag the last row onto the first.
-    const navRows = document.getElementById("chapterList").querySelectorAll(".chapter-row");
-    const navDt = new DataTransfer();
-    navRows[3].dispatchEvent(new DragEvent("dragstart", { dataTransfer: navDt, bubbles: true }));
-    navRows[0].dispatchEvent(new DragEvent("dragover", { dataTransfer: navDt, bubbles: true }));
-    navRows[0].dispatchEvent(new DragEvent("drop", { dataTransfer: navDt, bubbles: true }));
-    navRows[3].dispatchEvent(new DragEvent("dragend", { dataTransfer: navDt, bubbles: true }));
-    await navWait(400);
-    const navOrderReordered = (await window.folio.getBookMeta()).chapterOrder;
-    out.navOrderReordered = navOrderReordered;
-    out.navReorderChanged =
-      JSON.stringify(navOrderReordered) === JSON.stringify(["ch4", "ch1", "ch2", "ch3"]);
-    const navOptionsAfter = navOptions();
-    out.navOptionsAfterReorder = navOptionsAfter;
-    out.navDropdownFollowsReorder =
-      JSON.stringify(navOptionsAfter) === JSON.stringify(["Four", "One", "Two", "Three"]);
-
-    // Full Book is re-rendered at the top: the new first chapter (Four) is
-    // current, Previous is disabled, and Next now moves to One.
-    const navAfterReorder = navSnap();
-    out.navAfterReorder = navAfterReorder;
-    out.navFollowsNewOrder =
-      navAfterReorder.value === "ch4" &&
-      navAfterReorder.prevDisabled &&
-      navAfterReorder.fullBookVisible &&
-      chapterTopY("Four") >= 0 &&
-      chapterTopY("Four") < 200;
-    navNext.click();
-    await navWait(300);
-    const navNextAfterReorder = navSnap();
-    out.navNextAfterReorder = navNextAfterReorder;
-    out.navNextAfterReorderOk =
-      navNextAfterReorder.value === "ch1" &&
-      navNextAfterReorder.fullBookVisible &&
-      chapterTopY("One") >= 0 &&
-      chapterTopY("One") < 200;
-
-    // 8. Page breaks still render after navigation. Break markers are
-    // decorations on the first line of every chapter after the first, and
-    // CodeMirror only puts rendered lines in the DOM, so navigate to a middle
-    // chapter and confirm its marked first line is present.
-    navSel.value = "ch2";
-    navSel.dispatchEvent(new Event("change", { bubbles: true }));
-    await navWait(300);
-    const navBreaks = chapterBreakLines();
-    out.navBreakCount = navBreaks.length;
-    out.navBreaksOk = navBreaks.length >= 1 && navBreaks.some((el) => el.textContent.startsWith("# Two"));
-
-    // --- theme system: selector, immediate switching, persistence ---
-    const themeSelect = document.getElementById("themeSelect");
-    const themeVar = (name) =>
-      getComputedStyle(document.documentElement).getPropertyValue(name).trim();
-    const docBeforeTheme = navBook.state.doc.toString();
-    out.themeSelectPresent = !!themeSelect;
-    out.themeSelectOptions = themeSelect
-      ? Array.from(themeSelect.options).map((o) => o.value)
-      : [];
-    out.themeHasLight = out.themeSelectOptions.includes("light");
-    out.themeHasNeonflux = out.themeSelectOptions.includes("neonflux");
-    out.themeInitialStored = await window.folio.getTheme();
-    out.themeInitialAttr = document.documentElement.getAttribute("data-theme");
-    // Old saves may hold "default", which must resolve to the Light theme
-    // (migration). Valid saved themes must be restored exactly on startup.
-    out.themeInitialConsistent =
-      out.themeInitialStored === "default" || out.themeInitialStored === "light"
-        ? out.themeInitialAttr === "light"
-        : out.themeInitialAttr === out.themeInitialStored;
-
-    // Switch to Neonflux: applies immediately and persists via IPC.
-    themeSelect.value = "neonflux";
-    themeSelect.dispatchEvent(new Event("change", { bubbles: true }));
-    await navWait(200);
-    out.themeNeonfluxAttr = document.documentElement.getAttribute("data-theme");
-    out.themeNeonfluxStored = await window.folio.getTheme();
-    const neonBg = themeVar("--color-bg");
-    const neonAccent = themeVar("--color-accent");
-    out.themeNeonfluxBg = neonBg;
-    out.themeNeonfluxAccent = neonAccent;
-    out.themeNeonfluxApplied =
-      out.themeNeonfluxAttr === "neonflux" &&
-      out.themeNeonfluxStored === "neonflux" &&
-      neonBg.toLowerCase() === "#0a0d14" &&
-      neonAccent.toLowerCase() === "#22d3ee";
-
-    // Neonflux is dark: computed background of the app should be near-black.
-    const neonBodyBg = getComputedStyle(document.body).backgroundColor;
-    out.themeNeonfluxDark = /rgb\((10|11|12|9|8),/.test(neonBodyBg);
-
-    // Switching themes must not touch the manuscript content.
-    out.themeContentUnchanged = navBook.state.doc.toString() === docBeforeTheme;
-
-    // Switch to Light: applies immediately and persists.
-    themeSelect.value = "light";
-    themeSelect.dispatchEvent(new Event("change", { bubbles: true }));
-    await navWait(200);
-    out.themeLightAttr = document.documentElement.getAttribute("data-theme");
-    out.themeLightStored = await window.folio.getTheme();
-    const lightBg = themeVar("--color-bg");
-    const lightAccent = themeVar("--color-accent");
-    out.themeLightBg = lightBg;
-    out.themeLightAccent = lightAccent;
-    out.themeLightApplied =
-      out.themeLightAttr === "light" &&
-      out.themeLightStored === "light" &&
-      lightBg.toLowerCase() === "#fffdf9" &&
-      lightAccent.toLowerCase() === "#2f6b5f";
-
-    // Light is light: computed background must be a warm off-white, never the
-    // near-black used by Neonflux.
-    const lightBodyBg = getComputedStyle(document.body).backgroundColor;
-    out.themeLightNotDark = !/rgb\((10|11|12|9|8),/.test(lightBodyBg);
-    out.themeContentUnchanged2 = navBook.state.doc.toString() === docBeforeTheme;
-
-    // Round-trip: back to Neonflux restores it exactly.
-    themeSelect.value = "neonflux";
-    themeSelect.dispatchEvent(new Event("change", { bubbles: true }));
-    await navWait(200);
-    out.themeRoundTripAttr = document.documentElement.getAttribute("data-theme");
-    out.themeRoundTripStored = await window.folio.getTheme();
-    out.themeRoundTripOk =
-      out.themeRoundTripAttr === "neonflux" &&
-      out.themeRoundTripStored === "neonflux" &&
-      themeVar("--color-bg").toLowerCase() === "#0a0d14" &&
-      themeVar("--color-accent").toLowerCase() === "#22d3ee";
-
-    // Leave the app on Light so subsequent runs start deterministically.
-    themeSelect.value = "light";
-    themeSelect.dispatchEvent(new Event("change", { bubbles: true }));
-    await navWait(200);
-    out.themeFinalAttr = document.documentElement.getAttribute("data-theme");
-    out.themeFinalStored = await window.folio.getTheme();
-    out.themeFinalLightOk = out.themeFinalAttr === "light" && out.themeFinalStored === "light";
-    out.themeContentUnchanged3 = navBook.state.doc.toString() === docBeforeTheme;
-
-    const okFlags = [
-      "dndMoved",
-      "kbMoved",
-      "modalShown",
-      "uiCreated",
-      "hasEditor",
-      "editorAutosaved",
-      "toolbarBoldOk",
-      "focusAfterBold",
-      "shortcutBoldOk",
-      "headingOk",
-      "undoOk",
-      "redoOk",
-      "strikeShortcutOk",
-      "fencedCodeOk",
-      "underlineOk",
-      "checklistOk",
-      "highlightOk",
-      "tableOk",
-      "painterOk",
-      "colorMenuOpens",
-      "colorMenuOnScreen",
-      "colorApplied",
-      "customColorApplied",
-      "formattingAutosaved",
-      "fullBookShown",
-      "assembledOk",
-      "fullBookStatsOk",
-      "chapterBreakCountOk",
-      "firstChapterUnmarked",
-      "breaksAtChapterStarts",
-      "printBreakRule",
-      "printBreakFallback",
-      "printBreakScoped",
-      "copyAllOk",
-      "copyStatusShown",
-      "fullBookSelectAllOk",
-      "backToChapterOk",
-      "reorderOk",
-      "fbAfterReorderOk",
-      "fbHasAllContent",
-      "fbBreakAfterReorderOk",
-      "fbNoStale",
-      "fbLayoutOk",
-      "reopenPersists",
-      "deleteOk",
-      "fbAfterDeleteOk",
-      "fbAfterRenameOk",
-      "fbEmptyOk",
-      "exportMenuPresent",
-      "exportMenuOpened",
-      "pdfItemPresent",
-      "pdfExportPdfVisible",
-      "pdfStatusShown",
-      "pdfExportOk",
-      "printBookHiddenOnScreen",
-      "printBookHasAllChapters",
-      "printBookLongFull",
-      "pdfLongExportOk",
-      "docxExportOk",
-      "odtExportOk",
-      "printFmtOk",
-      "navOptionsOk",
-      "navOpenAtOneOk",
-      "navNextToTwoOk",
-      "navNextToThreeOk",
-      "navPrevToTwoOk",
-      "navDropToFourOk",
-      "navScrollBottomTracks",
-      "navScrollTopTracks",
-      "navReorderChanged",
-      "navDropdownFollowsReorder",
-      "navFollowsNewOrder",
-      "navNextAfterReorderOk",
-      "navBreaksOk",
-      "themeSelectPresent",
-      "themeHasLight",
-      "themeHasNeonflux",
-      "themeInitialConsistent",
-      "themeNeonfluxApplied",
-      "themeNeonfluxDark",
-      "themeContentUnchanged",
-      "themeLightApplied",
-      "themeLightNotDark",
-      "themeContentUnchanged2",
-      "themeRoundTripOk",
-      "themeFinalLightOk",
-      "themeContentUnchanged3",
-    ];
-    out.all = okFlags.every((f) => out[f] === true);
-  } catch (e) {
-    out.error = String((e && e.message) || e);
-  }
-  return out;
-})();