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/node_modules/playwright/lib/loader/loaderMain.js

@@ -0,0 +1,59 @@
+"use strict";
+var __defProp = Object.defineProperty;
+var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+var __getOwnPropNames = Object.getOwnPropertyNames;
+var __hasOwnProp = Object.prototype.hasOwnProperty;
+var __export = (target, all) => {
+  for (var name in all)
+    __defProp(target, name, { get: all[name], enumerable: true });
+};
+var __copyProps = (to, from, except, desc) => {
+  if (from && typeof from === "object" || typeof from === "function") {
+    for (let key of __getOwnPropNames(from))
+      if (!__hasOwnProp.call(to, key) && key !== except)
+        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
+  }
+  return to;
+};
+var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+var loaderMain_exports = {};
+__export(loaderMain_exports, {
+  LoaderMain: () => LoaderMain,
+  create: () => create
+});
+module.exports = __toCommonJS(loaderMain_exports);
+var import_configLoader = require("../common/configLoader");
+var import_esmLoaderHost = require("../common/esmLoaderHost");
+var import_poolBuilder = require("../common/poolBuilder");
+var import_process = require("../common/process");
+var import_testLoader = require("../common/testLoader");
+var import_compilationCache = require("../transform/compilationCache");
+class LoaderMain extends import_process.ProcessRunner {
+  constructor(serializedConfig) {
+    super();
+    this._poolBuilder = import_poolBuilder.PoolBuilder.createForLoader();
+    this._serializedConfig = serializedConfig;
+  }
+  _config() {
+    if (!this._configPromise)
+      this._configPromise = (0, import_configLoader.deserializeConfig)(this._serializedConfig);
+    return this._configPromise;
+  }
+  async loadTestFile(params) {
+    const testErrors = [];
+    const config = await this._config();
+    const fileSuite = await (0, import_testLoader.loadTestFile)(params.file, config.config.rootDir, testErrors);
+    this._poolBuilder.buildPools(fileSuite);
+    return { fileSuite: fileSuite._deepSerialize(), testErrors };
+  }
+  async getCompilationCacheFromLoader() {
+    await (0, import_esmLoaderHost.incorporateCompilationCache)();
+    return (0, import_compilationCache.serializeCompilationCache)();
+  }
+}
+const create = (config) => new LoaderMain(config);
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  LoaderMain,
+  create
+});