chore(app): upgrade Electron 33 -> 43

Electron 33 bundles Node 20.18, which has no type stripping. Every
tests/electron-*.mjs harness imports session-detail-assembly.mjs, which
in turn imports packages/core/src/session-detail.ts, so all three failed
at load with ERR_UNKNOWN_FILE_EXTENSION. Electron 43 bundles Node 24.18
and runs them.

better-sqlite3 11 does not compile against the newer V8 (removed
Context::GetIsolate, PropertyCallbackInfo::This, changed
SetNativeDataProperty signature), so the native dependency moves to 13
to match the ABI. electron-builder moves to 26 for Electron 43 support.

Verified: npm test 275/275, typecheck, electron-vite build, electron-builder
pack, and all three harnesses (15 + 55 + 11 assertions).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

app/package.json

@@ -70,15 +70,15 @@
     ]
   },
   "dependencies": {
-    "better-sqlite3": "^11.0.0",
+    "better-sqlite3": "^13.0.2",
     "chokidar": "^4.0.3"
   },
   "devDependencies": {
     "@tanstack/vue-virtual": "^3.13.32",
     "@types/better-sqlite3": "^7.6.13",
     "@vitejs/plugin-vue": "^5.0.0",
-    "electron": "^33.0.0",
-    "electron-builder": "^25.0.0",
+    "electron": "^43.2.0",
+    "electron-builder": "^26.15.3",
     "electron-vite": "^5.0.0",
     "vite": "^6.0.0",
     "vue": "^3.4.0",