feat: improve test setup and authentication handling

- Added `dev:test` script to package.json for streamlined testing without file watching.
- Introduced `kill-test-servers` script to ensure no existing servers are running on test ports before executing tests.
- Enhanced Playwright configuration to use mock agent for tests, ensuring consistent API responses and disabling rate limiting.
- Updated various test files to include authentication steps and handle login screens, improving reliability and reducing flakiness in tests.
- Added `global-setup` for e2e tests to ensure proper initialization before test execution.

apps/server/package.json

@@ -9,6 +9,7 @@
   "main": "dist/index.js",
   "scripts": {
     "dev": "tsx watch src/index.ts",
+    "dev:test": "tsx src/index.ts",
     "build": "tsc",
     "start": "node dist/index.js",
     "lint": "eslint src/",