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/xmlchars/xmlns/1.0/ed3.js

@@ -0,0 +1,65 @@
+"use strict";
+/**
+ * Character class utilities for XML NS 1.0 edition 3.
+ *
+ * @author Louis-Dominique Dubeau
+ * @license MIT
+ * @copyright Louis-Dominique Dubeau
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+//
+// Fragments.
+//
+// tslint:disable-next-line:max-line-length
+exports.NC_NAME_START_CHAR = "A-Z_a-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD\uD800\uDC00-\uDB7F\uDFFF";
+exports.NC_NAME_CHAR = "-" + exports.NC_NAME_START_CHAR + ".0-9\u00B7\u0300-\u036F\u203F-\u2040";
+//
+// Regular expressions.
+//
+exports.NC_NAME_START_CHAR_RE = new RegExp("^[" + exports.NC_NAME_START_CHAR + "]$", "u");
+exports.NC_NAME_CHAR_RE = new RegExp("^[" + exports.NC_NAME_CHAR + "]$", "u");
+exports.NC_NAME_RE = new RegExp("^[" + exports.NC_NAME_START_CHAR + "][" + exports.NC_NAME_CHAR + "]*$", "u");
+/**
+ * Determines whether a codepoint matches [[NC_NAME_START_CHAR]].
+ *
+ * @param c The code point.
+ *
+ * @returns ``true`` if the codepoint matches.
+ */
+// tslint:disable-next-line:cyclomatic-complexity
+function isNCNameStartChar(c) {
+    return ((c >= 0x41 && c <= 0x5A) ||
+        c === 0x5F ||
+        (c >= 0x61 && c <= 0x7A) ||
+        (c >= 0xC0 && c <= 0xD6) ||
+        (c >= 0xD8 && c <= 0xF6) ||
+        (c >= 0x00F8 && c <= 0x02FF) ||
+        (c >= 0x0370 && c <= 0x037D) ||
+        (c >= 0x037F && c <= 0x1FFF) ||
+        (c >= 0x200C && c <= 0x200D) ||
+        (c >= 0x2070 && c <= 0x218F) ||
+        (c >= 0x2C00 && c <= 0x2FEF) ||
+        (c >= 0x3001 && c <= 0xD7FF) ||
+        (c >= 0xF900 && c <= 0xFDCF) ||
+        (c >= 0xFDF0 && c <= 0xFFFD) ||
+        (c >= 0x10000 && c <= 0xEFFFF));
+}
+exports.isNCNameStartChar = isNCNameStartChar;
+/**
+ * Determines whether a codepoint matches [[NC_NAME_CHAR]].
+ *
+ * @param c The code point.
+ *
+ * @returns ``true`` if the codepoint matches.
+ */
+function isNCNameChar(c) {
+    return isNCNameStartChar(c) ||
+        (c === 0x2D ||
+            c === 0x2E ||
+            (c >= 0x30 && c <= 0x39) ||
+            c === 0x00B7 ||
+            (c >= 0x0300 && c <= 0x036F) ||
+            (c >= 0x203F && c <= 0x2040));
+}
+exports.isNCNameChar = isNCNameChar;
+//# sourceMappingURL=ed3.js.map