updated startup monitoring

controller/README.md

@@ -44,6 +44,7 @@ Current version: **v0.2.1**
 - Verbose debug logging with operation timing, post-start container state checks, and image pull detection
 - Clickable app cards on dashboard and applications pages (navigate to detail/deploy page)
 - Memory bar with two-segment visualization on deploy page (committed vs new app allocation)
+- Deployment progress UI: 3-step progress panel with real-time health polling (config → containers → health check)
 
 ### Known issues / next priorities
 - Cloudflare Tunnel + Traefik TLS: paperless.demo-felhom.eu works locally but shows "Not secure" (certificate chain not fully validated through tunnel)
@@ -154,8 +155,15 @@ controller/
    - Saves `app.yaml` (env vars + locked fields list)
    - Runs `docker compose up -d` with env vars injected
    - Updates in-memory state immediately (no stale "Telepítés" button)
-4. Post-deploy: locked fields (DB_PASSWORD, etc.) become read-only
-5. "Részletek" button opens deploy page in read-only mode showing current config
+4. **Progress UI** replaces the form with a 3-step progress panel:
+   - ✅ "Konfiguráció mentve" — shown immediately after API success
+   - ⏳ "Konténer(ek) indítása..." → ✅ when containers are up
+   - ⏳ "Alkalmazás inicializálása..." → ✅ when state = `running` (healthy)
+   - Polls `GET /api/stacks/{name}` every 3 seconds for real-time health status
+   - Handles: `running` (auto-redirect), `starting` (keep polling), `unhealthy` (warning), `exited` (error)
+   - Timeout after 120 seconds with informational message
+5. Post-deploy: locked fields (DB_PASSWORD, etc.) become read-only
+6. "Részletek" button opens deploy page in read-only mode showing current config
 
 ### Memory validation during deploy