feat(node-dashboard): add MVP dashboard API endpoint

- services/city-service: add /api/v1/nodes/{id}/dashboard endpoint
- services/city-service: add legacy /api/v1/node/dashboard?nodeId=...
- apps/web: update route.ts to use city-service first
- apps/web: fallback to node-registry if city-service fails

Response structure:
  node_id, name, kind, status, tags, agents_total,
  agents_online, uptime (null), metrics_available (false)

Closes TASK_PHASE_NODE_DASHBOARD_API_MVP

apps/web/src/app/api/node/dashboard/route.ts

@@ -1,25 +1,39 @@
 import { NextRequest, NextResponse } from 'next/server';
 
-const NODE_REGISTRY_URL = process.env.NODE_REGISTRY_URL || 'http://dagi-node-registry:9205';
+// Primary: city-service (has /api/v1/nodes/{id}/dashboard)
+// Fallback: node-registry (legacy, if configured)
+const CITY_SERVICE_URL = process.env.INTERNAL_API_URL || 'http://daarion-city-service:7001';
+const NODE_REGISTRY_URL = process.env.NODE_REGISTRY_URL || '';
 
 export async function GET(request: NextRequest) {
   try {
     const { searchParams } = new URL(request.url);
     const nodeId = searchParams.get('nodeId');
     
-    // Build URL - either specific node or self
-    const endpoint = nodeId 
-      ? `${NODE_REGISTRY_URL}/api/v1/nodes/${nodeId}/dashboard`
-      : `${NODE_REGISTRY_URL}/api/v1/nodes/self/dashboard`;
+    if (!nodeId) {
+      return NextResponse.json(
+        { error: 'nodeId query parameter is required' },
+        { status: 400 }
+      );
+    }
     
-    const response = await fetch(endpoint, {
-      headers: {
-        'Content-Type': 'application/json',
-      },
-      // Revalidate every 10 seconds
+    // Try city-service first (MVP dashboard)
+    const cityServiceEndpoint = `${CITY_SERVICE_URL}/api/v1/nodes/${nodeId}/dashboard`;
+    
+    let response = await fetch(cityServiceEndpoint, {
+      headers: { 'Content-Type': 'application/json' },
       next: { revalidate: 10 }
     });
     
+    // If city-service fails and node-registry is configured, try it as fallback
+    if (!response.ok && NODE_REGISTRY_URL) {
+      const nodeRegistryEndpoint = `${NODE_REGISTRY_URL}/api/v1/nodes/${nodeId}/dashboard`;
+      response = await fetch(nodeRegistryEndpoint, {
+        headers: { 'Content-Type': 'application/json' },
+        next: { revalidate: 10 }
+      });
+    }
+    
     if (!response.ok) {
       return NextResponse.json(
         { error: `Failed to fetch dashboard: ${response.status}` },
@@ -38,4 +52,3 @@ export async function GET(request: NextRequest) {
     );
   }
 }
-

services/city-service/routes_city.py

@@ -753,6 +753,55 @@ async def ask_citizen(
         raise HTTPException(status_code=500, detail="Failed to ask citizen")
 
 
+# =============================================================================
+# API v1 — Node Dashboard
+# =============================================================================
+
+@api_router.get("/nodes/{node_id}/dashboard")
+async def get_node_dashboard(node_id: str):
+    """
+    Отримати мінімальний Dashboard для ноди (MVP).
+    
+    Повертає базову інформацію + placeholder для метрик:
+    - node_id, name, kind, status
+    - tags (roles)
+    - agents_total, agents_online
+    - uptime (null — placeholder)
+    - metrics_available (false — placeholder)
+    """
+    try:
+        node = await repo_city.get_node_by_id(node_id)
+        if not node:
+            raise HTTPException(status_code=404, detail=f"Node not found: {node_id}")
+        
+        return {
+            "node_id": node["node_id"],
+            "name": node["name"],
+            "kind": node.get("kind"),
+            "status": node.get("status", "unknown"),
+            "tags": list(node.get("roles") or []),
+            "agents_total": node.get("agents_total", 0),
+            "agents_online": node.get("agents_online", 0),
+            "uptime": None,  # placeholder — буде заповнено коли з'явиться Prometheus/NATS
+            "metrics_available": False  # прапорець, що розширеного дашборду ще немає
+        }
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Failed to get node dashboard for {node_id}: {e}")
+        raise HTTPException(status_code=500, detail="Failed to get node dashboard")
+
+
+# Legacy endpoint for frontend compatibility
+@api_router.get("/node/dashboard")
+async def get_node_dashboard_legacy(node_id: str = Query(..., description="Node ID")):
+    """
+    Legacy endpoint: /api/v1/node/dashboard?nodeId=...
+    Redirects to canonical /api/v1/nodes/{node_id}/dashboard
+    """
+    return await get_node_dashboard(node_id)
+
+
 # =============================================================================
 # API v1 — MicroDAO Membership
 # =============================================================================