feat(playwright): integrate Playwright for end-to-end testing and update .gitignore

- Added Playwright as a development dependency for end-to-end testing.
- Updated package.json to include test scripts for Playwright.
- Enhanced .gitignore to exclude Playwright test results and cache files.
- Improved content extraction logic in various components to handle new content types.

Made-with: Cursor

packages/app/package.json

@@ -12,6 +12,8 @@
     "build": "vue-tsc --noEmit && vite build",
     "preview": "vite preview",
     "test": "vitest run",
+    "test:e2e": "playwright test",
+    "test:e2e:ui": "playwright test --ui",
     "lint": "eslint src/",
     "typecheck": "vue-tsc --noEmit",
     "clean": "rm -rf dist"
@@ -34,6 +36,7 @@
     "typescript": "~5.8.0",
     "vite": "latest",
     "vite-plugin-pwa": "^1.2.0",
+    "@playwright/test": "^1.49.0",
     "vitest": "latest",
     "vue-tsc": "latest"
   }