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/runner/loaderHost.js

@@ -0,0 +1,89 @@
+"use strict";
+var __create = Object.create;
+var __defProp = Object.defineProperty;
+var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+var __getOwnPropNames = Object.getOwnPropertyNames;
+var __getProtoOf = Object.getPrototypeOf;
+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 __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
+  // If the importer is in node compatibility mode or this is not an ESM
+  // file that has been converted to a CommonJS file using a Babel-
+  // compatible transform (i.e. "__esModule" has not been set), then set
+  // "default" to the CommonJS "module.exports" for node compatibility.
+  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
+  mod
+));
+var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+var loaderHost_exports = {};
+__export(loaderHost_exports, {
+  InProcessLoaderHost: () => InProcessLoaderHost,
+  OutOfProcessLoaderHost: () => OutOfProcessLoaderHost
+});
+module.exports = __toCommonJS(loaderHost_exports);
+var import_processHost = require("./processHost");
+var import_esmLoaderHost = require("../common/esmLoaderHost");
+var import_ipc = require("../common/ipc");
+var import_poolBuilder = require("../common/poolBuilder");
+var import_test = require("../common/test");
+var import_testLoader = require("../common/testLoader");
+var import_compilationCache = require("../transform/compilationCache");
+class InProcessLoaderHost {
+  constructor(config) {
+    this._config = config;
+    this._poolBuilder = import_poolBuilder.PoolBuilder.createForLoader();
+  }
+  async start(errors) {
+    return true;
+  }
+  async loadTestFile(file, testErrors) {
+    const result = await (0, import_testLoader.loadTestFile)(file, this._config.config.rootDir, testErrors);
+    this._poolBuilder.buildPools(result, testErrors);
+    return result;
+  }
+  async stop() {
+    await (0, import_esmLoaderHost.incorporateCompilationCache)();
+  }
+}
+class OutOfProcessLoaderHost {
+  constructor(config) {
+    this._config = config;
+    this._processHost = new import_processHost.ProcessHost(require.resolve("../loader/loaderMain.js"), "loader", {});
+  }
+  async start(errors) {
+    const startError = await this._processHost.startRunner((0, import_ipc.serializeConfig)(this._config, false));
+    if (startError) {
+      errors.push({
+        message: `Test loader process failed to start with code "${startError.code}" and signal "${startError.signal}"`
+      });
+      return false;
+    }
+    return true;
+  }
+  async loadTestFile(file, testErrors) {
+    const result = await this._processHost.sendMessage({ method: "loadTestFile", params: { file } });
+    testErrors.push(...result.testErrors);
+    return import_test.Suite._deepParse(result.fileSuite);
+  }
+  async stop() {
+    const result = await this._processHost.sendMessage({ method: "getCompilationCacheFromLoader" });
+    (0, import_compilationCache.addToCompilationCache)(result);
+    await this._processHost.stop();
+  }
+}
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  InProcessLoaderHost,
+  OutOfProcessLoaderHost
+});