Set up comprehensive frontend testing infrastructure

- Install Jest for unit testing with React Testing Library
- Install Playwright for end-to-end testing
- Configure Jest with proper TypeScript support and module mapping
- Create test setup files and utilities for both unit and e2e tests

Components:
* Jest configuration with coverage thresholds
* Playwright configuration with browser automation
* Unit tests for LoginForm, AuthContext, and useSocketIO hook
* E2E tests for authentication, dashboard, and agents workflows
* GitHub Actions workflow for automated testing
* Mock data and API utilities for consistent testing
* Test documentation with best practices

Testing features:
- Unit tests with 70% coverage threshold
- E2E tests with API mocking and user journey testing
- CI/CD integration for automated test runs
- Cross-browser testing support with Playwright
- Authentication system testing end-to-end

🚀 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/node_modules/@testing-library/user-event/dist/cjs/utils/keyDef/readNextDescriptor.js

@@ -0,0 +1,92 @@
+'use strict';
+
+var bracketDict = /*#__PURE__*/ function(bracketDict) {
+    bracketDict["{"] = "}";
+    bracketDict["["] = "]";
+    return bracketDict;
+}(bracketDict || {});
+/**
+ * Read the next key definition from user input
+ *
+ * Describe key per `{descriptor}` or `[descriptor]`.
+ * Everything else will be interpreted as a single character as descriptor - e.g. `a`.
+ * Brackets `{` and `[` can be escaped by doubling - e.g. `foo[[bar` translates to `foo[bar`.
+ * A previously pressed key can be released per `{/descriptor}`.
+ * Keeping the key pressed can be written as `{descriptor>}`.
+ * When keeping the key pressed you can choose how long the key is pressed `{descriptor>3}`.
+ * You can then release the key per `{descriptor>3/}` or keep it pressed and continue with the next key.
+ */ function readNextDescriptor(text, context) {
+    let pos = 0;
+    const startBracket = text[pos] in bracketDict ? text[pos] : '';
+    pos += startBracket.length;
+    const isEscapedChar = new RegExp(`^\\${startBracket}{2}`).test(text);
+    const type = isEscapedChar ? '' : startBracket;
+    return {
+        type,
+        ...type === '' ? readPrintableChar(text, pos, context) : readTag(text, pos, type, context)
+    };
+}
+function readPrintableChar(text, pos, context) {
+    const descriptor = text[pos];
+    assertDescriptor(descriptor, text, pos, context);
+    pos += descriptor.length;
+    return {
+        consumedLength: pos,
+        descriptor,
+        releasePrevious: false,
+        releaseSelf: true,
+        repeat: 1
+    };
+}
+function readTag(text, pos, startBracket, context) {
+    var _text_slice_match, _text_slice_match1;
+    const releasePreviousModifier = text[pos] === '/' ? '/' : '';
+    pos += releasePreviousModifier.length;
+    const escapedDescriptor = startBracket === '{' && text[pos] === '\\';
+    pos += Number(escapedDescriptor);
+    const descriptor = escapedDescriptor ? text[pos] : (_text_slice_match = text.slice(pos).match(startBracket === '{' ? /^\w+|^[^}>/]/ : /^\w+/)) === null || _text_slice_match === undefined ? undefined : _text_slice_match[0];
+    assertDescriptor(descriptor, text, pos, context);
+    pos += descriptor.length;
+    var _text_slice_match_;
+    const repeatModifier = (_text_slice_match_ = (_text_slice_match1 = text.slice(pos).match(/^>\d+/)) === null || _text_slice_match1 === undefined ? undefined : _text_slice_match1[0]) !== null && _text_slice_match_ !== undefined ? _text_slice_match_ : '';
+    pos += repeatModifier.length;
+    const releaseSelfModifier = text[pos] === '/' || !repeatModifier && text[pos] === '>' ? text[pos] : '';
+    pos += releaseSelfModifier.length;
+    const expectedEndBracket = bracketDict[startBracket];
+    const endBracket = text[pos] === expectedEndBracket ? expectedEndBracket : '';
+    if (!endBracket) {
+        throw new Error(getErrorMessage([
+            !repeatModifier && 'repeat modifier',
+            !releaseSelfModifier && 'release modifier',
+            `"${expectedEndBracket}"`
+        ].filter(Boolean).join(' or '), text[pos], text, context));
+    }
+    pos += endBracket.length;
+    return {
+        consumedLength: pos,
+        descriptor,
+        releasePrevious: !!releasePreviousModifier,
+        repeat: repeatModifier ? Math.max(Number(repeatModifier.substr(1)), 1) : 1,
+        releaseSelf: hasReleaseSelf(releaseSelfModifier, repeatModifier)
+    };
+}
+function assertDescriptor(descriptor, text, pos, context) {
+    if (!descriptor) {
+        throw new Error(getErrorMessage('key descriptor', text[pos], text, context));
+    }
+}
+function hasReleaseSelf(releaseSelfModifier, repeatModifier) {
+    if (releaseSelfModifier) {
+        return releaseSelfModifier === '/';
+    }
+    if (repeatModifier) {
+        return false;
+    }
+}
+function getErrorMessage(expected, found, text, context) {
+    return `Expected ${expected} but found "${found !== null && found !== undefined ? found : ''}" in "${text}"
+    See ${context === 'pointer' ? `https://testing-library.com/docs/user-event/pointer#pressing-a-button-or-touching-the-screen` : `https://testing-library.com/docs/user-event/keyboard`}
+    for more information about how userEvent parses your input.`;
+}
+
+exports.readNextDescriptor = readNextDescriptor;