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/common/suiteUtils.js

@@ -0,0 +1,140 @@
+"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 suiteUtils_exports = {};
+__export(suiteUtils_exports, {
+  applyRepeatEachIndex: () => applyRepeatEachIndex,
+  bindFileSuiteToProject: () => bindFileSuiteToProject,
+  filterByFocusedLine: () => filterByFocusedLine,
+  filterOnly: () => filterOnly,
+  filterSuite: () => filterSuite,
+  filterTestsRemoveEmptySuites: () => filterTestsRemoveEmptySuites
+});
+module.exports = __toCommonJS(suiteUtils_exports);
+var import_path = __toESM(require("path"));
+var import_utils = require("playwright-core/lib/utils");
+var import_util = require("../util");
+function filterSuite(suite, suiteFilter, testFilter) {
+  for (const child of suite.suites) {
+    if (!suiteFilter(child))
+      filterSuite(child, suiteFilter, testFilter);
+  }
+  const filteredTests = suite.tests.filter(testFilter);
+  const entries = /* @__PURE__ */ new Set([...suite.suites, ...filteredTests]);
+  suite._entries = suite._entries.filter((e) => entries.has(e));
+}
+function filterTestsRemoveEmptySuites(suite, filter) {
+  const filteredSuites = suite.suites.filter((child) => filterTestsRemoveEmptySuites(child, filter));
+  const filteredTests = suite.tests.filter(filter);
+  const entries = /* @__PURE__ */ new Set([...filteredSuites, ...filteredTests]);
+  suite._entries = suite._entries.filter((e) => entries.has(e));
+  return !!suite._entries.length;
+}
+function bindFileSuiteToProject(project, suite) {
+  const relativeFile = import_path.default.relative(project.project.testDir, suite.location.file);
+  const fileId = (0, import_utils.calculateSha1)((0, import_utils.toPosixPath)(relativeFile)).slice(0, 20);
+  const result = suite._deepClone();
+  result._fileId = fileId;
+  result.forEachTest((test, suite2) => {
+    suite2._fileId = fileId;
+    const [file, ...titles] = test.titlePath();
+    const testIdExpression = `[project=${project.id}]${(0, import_utils.toPosixPath)(file)}${titles.join("")}`;
+    const testId = fileId + "-" + (0, import_utils.calculateSha1)(testIdExpression).slice(0, 20);
+    test.id = testId;
+    test._projectId = project.id;
+    let inheritedRetries;
+    let inheritedTimeout;
+    for (let parentSuite = suite2; parentSuite; parentSuite = parentSuite.parent) {
+      if (parentSuite._staticAnnotations.length)
+        test.annotations.unshift(...parentSuite._staticAnnotations);
+      if (inheritedRetries === void 0 && parentSuite._retries !== void 0)
+        inheritedRetries = parentSuite._retries;
+      if (inheritedTimeout === void 0 && parentSuite._timeout !== void 0)
+        inheritedTimeout = parentSuite._timeout;
+    }
+    test.retries = inheritedRetries ?? project.project.retries;
+    test.timeout = inheritedTimeout ?? project.project.timeout;
+    if (test.annotations.some((a) => a.type === "skip" || a.type === "fixme"))
+      test.expectedStatus = "skipped";
+    if (test._poolDigest)
+      test._workerHash = `${project.id}-${test._poolDigest}-0`;
+  });
+  return result;
+}
+function applyRepeatEachIndex(project, fileSuite, repeatEachIndex) {
+  fileSuite.forEachTest((test, suite) => {
+    if (repeatEachIndex) {
+      const [file, ...titles] = test.titlePath();
+      const testIdExpression = `[project=${project.id}]${(0, import_utils.toPosixPath)(file)}${titles.join("")} (repeat:${repeatEachIndex})`;
+      const testId = suite._fileId + "-" + (0, import_utils.calculateSha1)(testIdExpression).slice(0, 20);
+      test.id = testId;
+      test.repeatEachIndex = repeatEachIndex;
+      if (test._poolDigest)
+        test._workerHash = `${project.id}-${test._poolDigest}-${repeatEachIndex}`;
+    }
+  });
+}
+function filterOnly(suite) {
+  if (!suite._getOnlyItems().length)
+    return;
+  const suiteFilter = (suite2) => suite2._only;
+  const testFilter = (test) => test._only;
+  return filterSuiteWithOnlySemantics(suite, suiteFilter, testFilter);
+}
+function filterSuiteWithOnlySemantics(suite, suiteFilter, testFilter) {
+  const onlySuites = suite.suites.filter((child) => filterSuiteWithOnlySemantics(child, suiteFilter, testFilter) || suiteFilter(child));
+  const onlyTests = suite.tests.filter(testFilter);
+  const onlyEntries = /* @__PURE__ */ new Set([...onlySuites, ...onlyTests]);
+  if (onlyEntries.size) {
+    suite._entries = suite._entries.filter((e) => onlyEntries.has(e));
+    return true;
+  }
+  return false;
+}
+function filterByFocusedLine(suite, focusedTestFileLines) {
+  if (!focusedTestFileLines.length)
+    return;
+  const matchers = focusedTestFileLines.map(createFileMatcherFromFilter);
+  const testFileLineMatches = (testFileName, testLine, testColumn) => matchers.some((m) => m(testFileName, testLine, testColumn));
+  const suiteFilter = (suite2) => !!suite2.location && testFileLineMatches(suite2.location.file, suite2.location.line, suite2.location.column);
+  const testFilter = (test) => testFileLineMatches(test.location.file, test.location.line, test.location.column);
+  return filterSuite(suite, suiteFilter, testFilter);
+}
+function createFileMatcherFromFilter(filter) {
+  const fileMatcher = (0, import_util.createFileMatcher)(filter.re || filter.exact || "");
+  return (testFileName, testLine, testColumn) => fileMatcher(testFileName) && (filter.line === testLine || filter.line === null) && (filter.column === testColumn || filter.column === null);
+}
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  applyRepeatEachIndex,
+  bindFileSuiteToProject,
+  filterByFocusedLine,
+  filterOnly,
+  filterSuite,
+  filterTestsRemoveEmptySuites
+});