Fix: milestone routes use milestone_code, config check via backend

- Milestone navigation now uses milestone_code instead of numeric id
- MilestoneDetailPage uses milestone.id (numeric) for project-scoped API calls
- App.tsx checks /config/status on backend first, falls back to wizard
- Added milestone_code to Milestone type
- Fixed MilestoneDetailPage to use fetched milestone.id for sub-queries

src/App.tsx

@@ -22,6 +22,10 @@ import axios from 'axios'
 const WIZARD_PORT = Number(import.meta.env.VITE_WIZARD_PORT) || 18080
 const WIZARD_BASE = `http://127.0.0.1:${WIZARD_PORT}`
 
+const getApiBase = () => {
+  return localStorage.getItem('HF_BACKEND_BASE_URL') || import.meta.env.VITE_API_BASE || 'http://127.0.0.1:8000'
+}
+
 type AppState = 'checking' | 'setup' | 'ready'
 
 export default function App() {
@@ -33,6 +37,22 @@ export default function App() {
   }, [])
 
   const checkInitialized = async () => {
+    // First try the backend /config/status endpoint (reads from config volume directly)
+    try {
+      const res = await axios.get(`${getApiBase()}/config/status`, { timeout: 5000 })
+      const cfg = res.data || {}
+      if (cfg.backend_url) {
+        localStorage.setItem('HF_BACKEND_BASE_URL', cfg.backend_url)
+      }
+      if (cfg.initialized === true) {
+        setAppState('ready')
+        return
+      }
+    } catch {
+      // Backend unreachable — fall through to wizard check
+    }
+
+    // Fallback: try the wizard directly (needed during initial setup before backend starts)
     try {
       const res = await axios.get(`${WIZARD_BASE}/api/v1/config/harborforge.json`, {
         timeout: 5000,
@@ -47,7 +67,7 @@ export default function App() {
         setAppState('setup')
       }
     } catch {
-      // Wizard unreachable or config doesn't exist → setup needed
+      // Neither backend nor wizard reachable → setup needed
       setAppState('setup')
     }
   }