fix: System Overview widget - expose monitoring/health endpoints publicly + fix data formats

- Add /api/v1/monitoring/stats and /api/v1/health-checks/status to PUBLIC_ROUTES
  so the frontend widget can fetch without auth
- Transform monitoring stats response from nested {cpu:{percent}} to flat
  {cpu: number, memory: number, memoryUsage: number} for the widget
- Add summary {healthy, unhealthy, total} to health-checks/status response

dashcaddy-api/routes/monitoring.js

@@ -16,8 +16,22 @@ module.exports = function({ resourceMonitor, docker, asyncHandler, log, notifica
   // ===== RESOURCE MONITORING ENDPOINTS =====
 
   // Get all container stats (from resource monitor module)
+  // Returns a flat summary format for the System Overview widget:
+  //   { containerId: { cpu: <percent>, memory: <percent>, memoryUsage: <bytes>, name } }
   router.get('/monitoring/stats', asyncHandler(async (req, res) => {
-    const stats = resourceMonitor.getAllStats();
+    const raw = resourceMonitor.getAllStats();
+    // Transform nested { current: { cpu: { percent }, memory: { percent, usage } } }
+    // into flat { cpu: number, memory: number, memoryUsage: number } for the frontend widget
+    const stats = {};
+    for (const [id, data] of Object.entries(raw)) {
+      const cur = data.current || {};
+      stats[id] = {
+        name: data.name,
+        cpu: typeof cur.cpu === 'object' ? (cur.cpu.percent ?? 0) : (Number(cur.cpu) || 0),
+        memory: typeof cur.memory === 'object' ? (cur.memory.percent ?? 0) : (Number(cur.memory) || 0),
+        memoryUsage: typeof cur.memory === 'object' ? (cur.memory.usage ?? 0) : 0,
+      };
+    }
     success(res, { stats });
   }, 'monitoring-stats'));