feat: AI auto-fix bug tracker with real-time error monitoring

- Real-time error monitoring system with WebSocket
- Auto-fix agent that triggers on browser errors
- Bug tracker dashboard with floating button (🐛)
- Live activity stream showing AI thought process
- Fixed 4 JavaScript errors (SyntaxError, TypeError)
- Fixed SessionPicker API endpoint error
- Enhanced chat input with Monaco editor
- Session picker component for project management

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

public/js/app.js

@@ -30,22 +30,41 @@ document.addEventListener('DOMContentLoaded', () => {
 
 function setupEventListeners() {
     // Login form
-    loginForm.addEventListener('submit', handleLogin);
+    const loginForm = document.getElementById('login-form');
+    if (loginForm) {
+        loginForm.addEventListener('submit', handleLogin);
+    }
 
     // Logout
-    logoutBtn.addEventListener('click', handleLogout);
+    const logoutBtn = document.getElementById('logout-btn');
+    if (logoutBtn) {
+        logoutBtn.addEventListener('click', handleLogout);
+    }
 
     // Search
-    let searchTimeout;
-    searchInput.addEventListener('input', (e) => {
-        clearTimeout(searchTimeout);
-        searchTimeout = setTimeout(() => handleSearch(e.target.value), 300);
-    });
+    const searchInput = document.getElementById('search-input');
+    if (searchInput) {
+        let searchTimeout;
+        searchInput.addEventListener('input', (e) => {
+            clearTimeout(searchTimeout);
+            searchTimeout = setTimeout(() => handleSearch(e.target.value), 300);
+        });
+    }
 
     // Edit/Save/Cancel buttons
-    editBtn.addEventListener('click', startEditing);
-    saveBtn.addEventListener('click', saveFile);
-    cancelBtn.addEventListener('click', stopEditing);
+    const editBtn = document.getElementById('edit-btn');
+    const saveBtn = document.getElementById('save-btn');
+    const cancelBtn = document.getElementById('cancel-btn');
+
+    if (editBtn) {
+        editBtn.addEventListener('click', startEditing);
+    }
+    if (saveBtn) {
+        saveBtn.addEventListener('click', saveFile);
+    }
+    if (cancelBtn) {
+        cancelBtn.addEventListener('click', stopEditing);
+    }
 }
 
 // Auth functions