checkpoint: NIP-46 e2e test + bunker:// frontend support (85756df)

CHECKPOINT-encryption.md

@@ -1,3 +1,61 @@
+# Checkpoint — NIP-46 e2e test + bunker:// frontend support (2026-09-11)
+
+## Where things are
+- Project: `/home/avi/Projects/Keynctr`
+- Branch: `master` @ **`85756df`** ("feat(signer): accept bunker:// URIs, async
+  signer permissions, NIP-46 e2e test"). Previous: `c096705`, `f917e5e`.
+- Working tree: clean for tracked files. Untracked junk intentionally NOT
+  committed: `.opencode/`, `.impeccable/`, `.directory`, `COSMIC_THEME.md`,
+  `KeynectrAppIconPossibility02.jpeg`, `deferred/`, and the dead stub
+  `src/signer/nip46_external.rs`.
+- Verification (all green this session): `cargo test` **200 + 1 e2e passed / 0
+  failed**, `cargo clippy --all-targets` 0 warnings, `cargo fmt --check` clean,
+  `cargo build --release` green. Frontend: `npm test` **116 passed (16 files)**,
+  `npm run typecheck` clean, `npm run lint` clean, `npm run format:check` clean
+  (Prettier applied to the 4 previously-warning files), `npm run electron:build`
+  and `npm run build` green.
+
+## What was completed (this session)
+- `tests/nip46_e2e.rs` (new, 450 lines): full in-process NIP-46 client test —
+  minimal local relay + fake Amber speaking the bunker flow, NIP-44 round-trip,
+  `connect` handshake, identity asserted to come from `get_public_key` (URI key
+  must never become identity), `sign_event` result verified against the signer
+  pubkey, vault persistence asserting `profile.secret_key` stays empty for
+  remote profiles.
+- Frontend bunker:// support landed: `SignerManager.parseExternalSignerURI`
+  accepts `bunker://` (pubkey = authority before `@`) as well as
+  `nostrconnect://`; `SignerModeScreen` validates both, placeholder/hint explain
+  Amber vs Nostr Connect sources.
+- Signer trait permission surface made async (`permissions`, `can_*`,
+  `is_connection_valid` now `async`, `blocking_lock` -> `lock().await`).
+- Dev-loop gremlins fixed along the way: zombie vite on :5173 killed, stray
+  Electron (launched against dead vite, SIGTRAP core dump) cleaned up, app
+  relaunched and confirmed on screen.
+
+## Commits added (newest first)
+- `85756df` feat(signer): accept bunker:// URIs, async signer permissions,
+  NIP-46 e2e test
+
+## How to reproduce / exercise
+- Dev loop: `npm run dev` in `frontend/` (vite on :5173), THEN second terminal
+  `npm run start:dev` (or `NOSTR_GUI_DEV_URL=http://localhost:5173
+  KEYNCTR_ENABLE_GPU=1 npx electron .`). Vite must be up FIRST or Electron
+  crashes on load. Rust edits need `cargo build --release` + backend restart.
+- E2E test: `cargo test --test nip46_e2e` (~0.6s, no network).
+- GUI: Signer mode screen -> paste Amber `bunker://...` link -> approve in
+  Amber -> app resolves identity via `get_public_key`.
+
+## Deferred / next steps
+1. **Verify Amber end-to-end on device** (pair via Amber, sign a note, publish)
+   — unchanged, still the top item.
+2. Delete dead stub `src/signer/nip46_external.rs`; `deferred/` stays deferred.
+3. `publish_profile_metadata` (kind 0) still signs locally — reroute through
+   `Signing` for external profiles.
+4. Step 4 (permissions UI), Step 5 (KDF upgrade), Step 6 (undo history),
+   Step 7 (rename/hygiene incl. `homepage` URL) — unchanged.
+
+---
+
 # Checkpoint — Vault-load rewrite fix + Amber handshake lands (2026-09-11)
 
 ## Where things are