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/esm/utils/misc/cloneEvent.js

@@ -0,0 +1,5 @@
+function cloneEvent(event) {
+    return new event.constructor(event.type, event);
+}
+
+export { cloneEvent };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/findClosest.js

@@ -0,0 +1,12 @@
+function findClosest(element, callback) {
+    let el = element;
+    do {
+        if (callback(el)) {
+            return el;
+        }
+        el = el.parentElement;
+    }while (el && el !== element.ownerDocument.body)
+    return undefined;
+}
+
+export { findClosest };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/getDocumentFromNode.js

@@ -0,0 +1,8 @@
+function getDocumentFromNode(el) {
+    return isDocument(el) ? el : el.ownerDocument;
+}
+function isDocument(node) {
+    return node.nodeType === 9;
+}
+
+export { getDocumentFromNode };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/getTreeDiff.js

@@ -0,0 +1,23 @@
+function getTreeDiff(a, b) {
+    const treeA = [];
+    for(let el = a; el; el = el.parentElement){
+        treeA.push(el);
+    }
+    const treeB = [];
+    for(let el = b; el; el = el.parentElement){
+        treeB.push(el);
+    }
+    let i = 0;
+    for(;; i++){
+        if (i >= treeA.length || i >= treeB.length || treeA[treeA.length - 1 - i] !== treeB[treeB.length - 1 - i]) {
+            break;
+        }
+    }
+    return [
+        treeA.slice(0, treeA.length - i),
+        treeB.slice(0, treeB.length - i),
+        treeB.slice(treeB.length - i)
+    ];
+}
+
+export { getTreeDiff };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/getWindow.js

@@ -0,0 +1,17 @@
+function getWindow(node) {
+    var _node_ownerDocument;
+    if (isDocument(node) && node.defaultView) {
+        return node.defaultView;
+    } else if ((_node_ownerDocument = node.ownerDocument) === null || _node_ownerDocument === undefined ? undefined : _node_ownerDocument.defaultView) {
+        return node.ownerDocument.defaultView;
+    }
+    throw new Error(`Could not determine window of node. Node was ${describe(node)}`);
+}
+function isDocument(node) {
+    return node.nodeType === 9;
+}
+function describe(val) {
+    return typeof val === 'function' ? `function ${val.name}` : val === null ? 'null' : String(val);
+}
+
+export { getWindow };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/isDescendantOrSelf.js

@@ -0,0 +1,12 @@
+function isDescendantOrSelf(potentialDescendant, potentialAncestor) {
+    let el = potentialDescendant;
+    do {
+        if (el === potentialAncestor) {
+            return true;
+        }
+        el = el.parentElement;
+    }while (el)
+    return false;
+}
+
+export { isDescendantOrSelf };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/isDisabled.js

@@ -0,0 +1,31 @@
+import { isElementType } from './isElementType.js';
+
+// This should probably just rely on the :disabled pseudo-class, but JSDOM doesn't implement it properly.
+function isDisabled(element) {
+    for(let el = element; el; el = el.parentElement){
+        if (isElementType(el, [
+            'button',
+            'input',
+            'select',
+            'textarea',
+            'optgroup',
+            'option'
+        ])) {
+            if (el.hasAttribute('disabled')) {
+                return true;
+            }
+        } else if (isElementType(el, 'fieldset')) {
+            var _el_querySelector;
+            if (el.hasAttribute('disabled') && !((_el_querySelector = el.querySelector(':scope > legend')) === null || _el_querySelector === undefined ? undefined : _el_querySelector.contains(element))) {
+                return true;
+            }
+        } else if (el.tagName.includes('-')) {
+            if (el.constructor.formAssociated && el.hasAttribute('disabled')) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+export { isDisabled };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/isElementType.js

@@ -0,0 +1,18 @@
+function isElementType(element, tag, props) {
+    if (element.namespaceURI && element.namespaceURI !== 'http://www.w3.org/1999/xhtml') {
+        return false;
+    }
+    tag = Array.isArray(tag) ? tag : [
+        tag
+    ];
+    // tagName is uppercase in HTMLDocument and lowercase in XMLDocument
+    if (!tag.includes(element.tagName.toLowerCase())) {
+        return false;
+    }
+    if (props) {
+        return Object.entries(props).every(([k, v])=>element[k] === v);
+    }
+    return true;
+}
+
+export { isElementType };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/isVisible.js

@@ -0,0 +1,17 @@
+import { getWindow } from './getWindow.js';
+
+function isVisible(element) {
+    const window = getWindow(element);
+    for(let el = element; el === null || el === undefined ? undefined : el.ownerDocument; el = el.parentElement){
+        const { display, visibility } = window.getComputedStyle(el);
+        if (display === 'none') {
+            return false;
+        }
+        if (visibility === 'hidden') {
+            return false;
+        }
+    }
+    return true;
+}
+
+export { isVisible };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/level.js

@@ -0,0 +1,13 @@
+var ApiLevel = /*#__PURE__*/ function(ApiLevel) {
+    ApiLevel[ApiLevel["Trigger"] = 2] = "Trigger";
+    ApiLevel[ApiLevel["Call"] = 1] = "Call";
+    return ApiLevel;
+}({});
+function setLevelRef(instance, level) {
+    instance.levelRefs[level] = {};
+}
+function getLevelRef(instance, level) {
+    return instance.levelRefs[level];
+}
+
+export { ApiLevel, getLevelRef, setLevelRef };

frontend/node_modules/@testing-library/user-event/dist/esm/utils/misc/wait.js

@@ -0,0 +1,12 @@
+function wait(config) {
+    const delay = config.delay;
+    if (typeof delay !== 'number') {
+        return;
+    }
+    return Promise.all([
+        new Promise((resolve)=>globalThis.setTimeout(()=>resolve(), delay)),
+        config.advanceTimers(delay)
+    ]);
+}
+
+export { wait };