fix(cannaiq): Fix TasksDashboard worker API call

- Add getWorkerRegistry() method to API client
- Change TasksDashboard to use getWorkerRegistry() instead of non-existent getWorkers()

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

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

cannaiq/src/lib/api.ts

@@ -2989,6 +2989,15 @@ class ApiClient {
     );
   }
 
+  // Worker Registry API
+  async getWorkerRegistry() {
+    return this.request<{
+      success: boolean;
+      workers: Array<{ worker_id: string; friendly_name: string; status: string }>;
+      summary: { active_count: number; idle_count: number; offline_count: number; total_count: number };
+    }>('/api/worker-registry/workers');
+  }
+
   // ==========================================
   // Task Schedules API (recurring task definitions)
   // ==========================================

cannaiq/src/pages/TasksDashboard.tsx

@@ -771,7 +771,7 @@ export default function TasksDashboard() {
         api.getTaskCapacity(),
         api.getTaskPoolStatus(),
         api.getTaskSchedules(),
-        api.getWorkers().catch(() => ({ workers: [] })),
+        api.getWorkerRegistry().catch(() => ({ workers: [] })),
       ]);
 
       setTasks(tasksRes.tasks || []);