fix(ui): make chapter bridge manual-only and add release gate

Remove auto chapter-bridge prompt on book/chapter open so users trigger it from the cockpit. Fix AiPanel duplicate import that broke dev builds, and add release smoke tests plus test:release/test:ci scripts.

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -10,6 +10,8 @@
     "preview": "npx electron-vite preview",
     "test": "node node_modules/vitest/vitest.mjs run",
     "test:watch": "node node_modules/vitest/vitest.mjs",
+    "test:release": "npm run build && node node_modules/vitest/vitest.mjs run tests/release && npx playwright test e2e/release-smoke.spec.ts",
+    "test:ci": "npm run build && npm run test && npm run test:e2e",
     "test:e2e": "playwright test"
   },
   "keywords": [],