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/lastRun.js

@@ -0,0 +1,77 @@
+"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 lastRun_exports = {};
+__export(lastRun_exports, {
+  LastRunReporter: () => LastRunReporter
+});
+module.exports = __toCommonJS(lastRun_exports);
+var import_fs = __toESM(require("fs"));
+var import_path = __toESM(require("path"));
+var import_projectUtils = require("./projectUtils");
+class LastRunReporter {
+  constructor(config) {
+    this._config = config;
+    const [project] = (0, import_projectUtils.filterProjects)(config.projects, config.cliProjectFilter);
+    if (project)
+      this._lastRunFile = import_path.default.join(project.project.outputDir, ".last-run.json");
+  }
+  async filterLastFailed() {
+    if (!this._lastRunFile)
+      return;
+    try {
+      const lastRunInfo = JSON.parse(await import_fs.default.promises.readFile(this._lastRunFile, "utf8"));
+      const failedTestIds = new Set(lastRunInfo.failedTests);
+      this._config.postShardTestFilters.push((test) => failedTestIds.has(test.id));
+    } catch {
+    }
+  }
+  version() {
+    return "v2";
+  }
+  printsToStdio() {
+    return false;
+  }
+  onBegin(suite) {
+    this._suite = suite;
+  }
+  async onEnd(result) {
+    if (!this._lastRunFile || this._config.cliListOnly)
+      return;
+    const lastRunInfo = {
+      status: result.status,
+      failedTests: this._suite?.allTests().filter((t) => !t.ok()).map((t) => t.id) || []
+    };
+    await import_fs.default.promises.mkdir(import_path.default.dirname(this._lastRunFile), { recursive: true });
+    await import_fs.default.promises.writeFile(this._lastRunFile, JSON.stringify(lastRunInfo, void 0, 2));
+  }
+}
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  LastRunReporter
+});