Implement comprehensive frontend integration testing with Playwright

- Add Playwright E2E testing framework with cross-browser support (Chrome, Firefox)
- Create authentication helpers for CalDAV server integration
- Implement calendar interaction helpers with event creation, drag-and-drop, and view switching
- Add comprehensive drag-and-drop test suite with event cleanup
- Configure CI/CD integration with Gitea Actions for headless testing
- Support both local development and CI environments with proper dependency management
- Include video recording, screenshots, and HTML reporting for test debugging
- Handle Firefox-specific timing and interaction challenges with force clicks and timeouts

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/e2e/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "runway-e2e-tests",
+  "version": "1.0.0",
+  "description": "End-to-end tests for Runway Calendar App",
+  "main": "index.js",
+  "scripts": {
+    "test": "playwright test",
+    "test:headed": "playwright test --headed",
+    "test:debug": "playwright test --debug",
+    "test:ui": "playwright test --ui",
+    "test:chromium": "playwright test --project=chromium",
+    "test:firefox": "playwright test --project=firefox",
+    "install-browsers": "playwright install chromium firefox",
+    "install-deps": "sudo pacman -S --needed nss atk at-spi2-atk libcups gtk3 libxss mesa alsa-lib"
+  },
+  "keywords": ["playwright", "e2e", "testing", "calendar"],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@playwright/test": "^1.40.0",
+    "@types/node": "^20.0.0",
+    "typescript": "^5.0.0"
+  }
+}