refactor(tests): centralize test harness boilerplate into bundle.mjs helper

tests/run-project-test.mjs

@@ -1,24 +1,15 @@
 // Standalone test for the pure project/recents logic.
 // Builds src/main/project.ts with esbuild (no Electron needed) and asserts behavior.
 // Run with: node tests/run-project-test.mjs
-import esbuild from "esbuild";
 import fs from "fs";
 import os from "os";
 import path from "path";
-import url from "url";
+import { bundleForTest } from "./helpers/bundle.mjs";
 
-const out = path.join(os.tmpdir(), `folio-project-${process.pid}.mjs`);
-await esbuild.build({
-  entryPoints: [path.resolve("src/main/project.ts")],
-  bundle: true,
-  platform: "node",
-  format: "esm",
-  outfile: out,
-  write: true,
-  logLevel: "silent",
+const { mod, cleanupBundle } = await bundleForTest({
+  name: "folio-project",
+  entryPoints: ["src/main/project.ts"],
 });
-
-const mod = await import(url.pathToFileURL(out).href);
 const {
   APP_ID,
   META_FILE,
@@ -78,7 +69,7 @@ const id = makeChapterId("Chapter One");
 ok(id.startsWith("chapter-one-"), "chapter id slugified: " + id);
 ok(chapterFileName(id) === `${id}.md`, "filename is <id>.md");
 
-fs.rmSync(out, { force: true });
+cleanupBundle();
 fs.rmSync(dir, { recursive: true, force: true });
 
 console.log("\nProject tests: " + (failures === 0 ? "ALL PASSED" : failures + " FAILED"));