feat: add refactored testdrive-jsui capability with consolidated architecture

Complete integration of refactored testdrive-jsui capability:

## Refactored Architecture
- js/ - All JavaScript source (controls, components, core)
- static/ - CSS, images, templates
- src/testdrive_jsui/ - Python package
- tests/ - Python tests

## Plugin Self-Declaration
- get_plugin_source_dir() - plugin declares own location
- get_asset_paths() - organized asset paths
- No hardcoded discovery logic

## Merged Content
- Baseline UI scaffold (tutorials, LICENSE, INTRODUCTION.md)
- Refactored capability implementation
- Comprehensive documentation

Ready for standalone use or integration with markitect.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

js/tests/setup.js

@@ -0,0 +1,139 @@
+/**
+ * Jest Test Setup for TestDrive-JSUI
+ *
+ * Sets up the testing environment for JavaScript UI components.
+ * Provides DOM mocking, global utilities, and test helpers.
+ */
+
+// Mock DOM globals that might be missing in JSDOM
+global.ResizeObserver = jest.fn().mockImplementation(() => ({
+  observe: jest.fn(),
+  unobserve: jest.fn(),
+  disconnect: jest.fn(),
+}));
+
+global.IntersectionObserver = jest.fn().mockImplementation(() => ({
+  observe: jest.fn(),
+  unobserve: jest.fn(),
+  disconnect: jest.fn(),
+}));
+
+// Mock window.matchMedia
+Object.defineProperty(window, 'matchMedia', {
+  writable: true,
+  value: jest.fn().mockImplementation(query => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: jest.fn(), // deprecated
+    removeListener: jest.fn(), // deprecated
+    addEventListener: jest.fn(),
+    removeEventListener: jest.fn(),
+    dispatchEvent: jest.fn(),
+  })),
+});
+
+// Mock local storage
+const localStorageMock = {
+  getItem: jest.fn(),
+  setItem: jest.fn(),
+  removeItem: jest.fn(),
+  clear: jest.fn(),
+};
+global.localStorage = localStorageMock;
+
+// Mock session storage
+const sessionStorageMock = {
+  getItem: jest.fn(),
+  setItem: jest.fn(),
+  removeItem: jest.fn(),
+  clear: jest.fn(),
+};
+global.sessionStorage = sessionStorageMock;
+
+// Global test utilities
+global.testUtils = {
+  /**
+   * Create a mock DOM element with specified tag and attributes
+   */
+  createElement: (tag, attributes = {}) => {
+    const element = document.createElement(tag);
+    Object.entries(attributes).forEach(([key, value]) => {
+      element.setAttribute(key, value);
+    });
+    return element;
+  },
+
+  /**
+   * Create a test markdown content div
+   */
+  createMarkdownContent: (content = '# Test Content') => {
+    const div = document.createElement('div');
+    div.id = 'markdown-content';
+    div.innerHTML = content;
+    return div;
+  },
+
+  /**
+   * Wait for next tick (useful for async operations)
+   */
+  nextTick: () => new Promise(resolve => setTimeout(resolve, 0)),
+
+  /**
+   * Simulate user interaction events
+   */
+  simulateEvent: (element, eventType, eventProperties = {}) => {
+    const event = new Event(eventType, { bubbles: true, ...eventProperties });
+    Object.entries(eventProperties).forEach(([key, value]) => {
+      event[key] = value;
+    });
+    element.dispatchEvent(event);
+    return event;
+  },
+
+  /**
+   * Clean up DOM after each test
+   */
+  cleanupDOM: () => {
+    document.body.innerHTML = '';
+    document.head.innerHTML = '';
+  }
+};
+
+// Setup and teardown
+beforeEach(() => {
+  // Reset mocks
+  jest.clearAllMocks();
+
+  // Reset localStorage/sessionStorage
+  localStorageMock.getItem.mockClear();
+  localStorageMock.setItem.mockClear();
+  localStorageMock.removeItem.mockClear();
+  localStorageMock.clear.mockClear();
+
+  sessionStorageMock.getItem.mockClear();
+  sessionStorageMock.setItem.mockClear();
+  sessionStorageMock.removeItem.mockClear();
+  sessionStorageMock.clear.mockClear();
+});
+
+afterEach(() => {
+  // Clean up DOM
+  global.testUtils.cleanupDOM();
+
+  // Clean up any timers
+  jest.runOnlyPendingTimers();
+  jest.useRealTimers();
+});
+
+// Console helpers for test debugging
+global.console = {
+  ...console,
+  // Keep these methods for test debugging
+  log: console.log,
+  warn: console.warn,
+  error: console.error,
+  // Mock these to avoid noise in tests
+  info: jest.fn(),
+  debug: jest.fn(),
+};