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/matchers/toMatchAriaSnapshot.js

@@ -0,0 +1,163 @@
+"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 toMatchAriaSnapshot_exports = {};
+__export(toMatchAriaSnapshot_exports, {
+  toMatchAriaSnapshot: () => toMatchAriaSnapshot
+});
+module.exports = __toCommonJS(toMatchAriaSnapshot_exports);
+var import_fs = __toESM(require("fs"));
+var import_path = __toESM(require("path"));
+var import_utils = require("playwright-core/lib/utils");
+var import_matcherHint = require("./matcherHint");
+var import_expectBundle = require("../common/expectBundle");
+var import_util = require("../util");
+var import_expect = require("./expect");
+var import_globals = require("../common/globals");
+async function toMatchAriaSnapshot(receiver, expectedParam, options = {}) {
+  const matcherName = "toMatchAriaSnapshot";
+  const testInfo = (0, import_globals.currentTestInfo)();
+  if (!testInfo)
+    throw new Error(`toMatchAriaSnapshot() must be called during the test`);
+  if (testInfo._projectInternal.ignoreSnapshots)
+    return { pass: !this.isNot, message: () => "", name: "toMatchAriaSnapshot", expected: "" };
+  const updateSnapshots = testInfo.config.updateSnapshots;
+  const matcherOptions = {
+    isNot: this.isNot,
+    promise: this.promise
+  };
+  let expected;
+  let timeout;
+  let expectedPath;
+  if ((0, import_utils.isString)(expectedParam)) {
+    expected = expectedParam;
+    timeout = options.timeout ?? this.timeout;
+  } else {
+    const legacyPath = testInfo._resolveSnapshotPaths("aria", expectedParam?.name, "dontUpdateSnapshotIndex", ".yml").absoluteSnapshotPath;
+    expectedPath = testInfo._resolveSnapshotPaths("aria", expectedParam?.name, "updateSnapshotIndex").absoluteSnapshotPath;
+    if (!await (0, import_util.fileExistsAsync)(expectedPath) && await (0, import_util.fileExistsAsync)(legacyPath))
+      expectedPath = legacyPath;
+    expected = await import_fs.default.promises.readFile(expectedPath, "utf8").catch(() => "");
+    timeout = expectedParam?.timeout ?? this.timeout;
+  }
+  const generateMissingBaseline = updateSnapshots === "missing" && !expected;
+  if (generateMissingBaseline) {
+    if (this.isNot) {
+      const message2 = `Matchers using ".not" can't generate new baselines`;
+      return { pass: this.isNot, message: () => message2, name: "toMatchAriaSnapshot" };
+    } else {
+      expected = `- none "Generating new baseline"`;
+    }
+  }
+  expected = unshift(expected);
+  const { matches: pass, received, log, timedOut } = await receiver._expect("to.match.aria", { expectedValue: expected, isNot: this.isNot, timeout });
+  const typedReceived = received;
+  const matcherHintWithExpect = (expectedReceivedString) => {
+    return (0, import_matcherHint.matcherHint)(this, receiver, matcherName, "locator", void 0, matcherOptions, timedOut ? timeout : void 0, expectedReceivedString);
+  };
+  const notFound = typedReceived === import_matcherHint.kNoElementsFoundError;
+  if (notFound) {
+    return {
+      pass: this.isNot,
+      message: () => matcherHintWithExpect(`Expected: ${this.utils.printExpected(expected)}
+Received: ${(0, import_expectBundle.EXPECTED_COLOR)("<element not found>")}`) + (0, import_util.callLogText)(log),
+      name: "toMatchAriaSnapshot",
+      expected
+    };
+  }
+  const receivedText = typedReceived.raw;
+  const message = () => {
+    if (pass) {
+      const receivedString = notFound ? receivedText : (0, import_expect.printReceivedStringContainExpectedSubstring)(receivedText, receivedText.indexOf(expected), expected.length);
+      const expectedReceivedString = `Expected: not ${this.utils.printExpected(expected)}
+Received: ${receivedString}`;
+      return matcherHintWithExpect(expectedReceivedString) + (0, import_util.callLogText)(log);
+    } else {
+      const labelExpected = `Expected`;
+      const expectedReceivedString = notFound ? `${labelExpected}: ${this.utils.printExpected(expected)}
+Received: ${receivedText}` : this.utils.printDiffOrStringify(expected, receivedText, labelExpected, "Received", false);
+      return matcherHintWithExpect(expectedReceivedString) + (0, import_util.callLogText)(log);
+    }
+  };
+  if (!this.isNot) {
+    if (updateSnapshots === "all" || updateSnapshots === "changed" && pass === this.isNot || generateMissingBaseline) {
+      if (expectedPath) {
+        await import_fs.default.promises.mkdir(import_path.default.dirname(expectedPath), { recursive: true });
+        await import_fs.default.promises.writeFile(expectedPath, typedReceived.regex, "utf8");
+        const relativePath = import_path.default.relative(process.cwd(), expectedPath);
+        if (updateSnapshots === "missing") {
+          const message2 = `A snapshot doesn't exist at ${relativePath}, writing actual.`;
+          testInfo._hasNonRetriableError = true;
+          testInfo._failWithError(new Error(message2));
+        } else {
+          const message2 = `A snapshot is generated at ${relativePath}.`;
+          console.log(message2);
+        }
+        return { pass: true, message: () => "", name: "toMatchAriaSnapshot" };
+      } else {
+        const suggestedRebaseline = `\`
+${(0, import_utils.escapeTemplateString)(indent(typedReceived.regex, "{indent}  "))}
+{indent}\``;
+        if (updateSnapshots === "missing") {
+          const message2 = "A snapshot is not provided, generating new baseline.";
+          testInfo._hasNonRetriableError = true;
+          testInfo._failWithError(new Error(message2));
+        }
+        return { pass: false, message: () => "", name: "toMatchAriaSnapshot", suggestedRebaseline };
+      }
+    }
+  }
+  return {
+    name: matcherName,
+    expected,
+    message,
+    pass,
+    actual: received,
+    log,
+    timeout: timedOut ? timeout : void 0
+  };
+}
+function unshift(snapshot) {
+  const lines = snapshot.split("\n");
+  let whitespacePrefixLength = 100;
+  for (const line of lines) {
+    if (!line.trim())
+      continue;
+    const match = line.match(/^(\s*)/);
+    if (match && match[1].length < whitespacePrefixLength)
+      whitespacePrefixLength = match[1].length;
+  }
+  return lines.filter((t) => t.trim()).map((line) => line.substring(whitespacePrefixLength)).join("\n");
+}
+function indent(snapshot, indent2) {
+  return snapshot.split("\n").map((line) => indent2 + line).join("\n");
+}
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  toMatchAriaSnapshot
+});