feat: discover docker compose deps for dashboard

docs/api/PROTOCOL.md

@@ -384,7 +384,7 @@ Return status for user-level local LLM backend daemons (for example `ollama.serv
 
 #### `system.dockerDependencies`
 
-Return status for docker-compose managed dependencies (currently includes local Whisper service status for voice transcription workflows).
+Return status for docker-compose managed dependencies discovered from `docker-compose.yml` (excluding Flynn's own `flynn` service). Includes profile-scoped services (for example `whisper-server`, `brave-search`) when profiles are defined.
 
 **Request:**
 ```json
@@ -410,6 +410,17 @@ Return status for docker-compose managed dependencies (currently includes local
         "statusText": "Up 4 minutes (healthy)",
         "containerName": "flynn-whisper-server-1",
         "availableActions": ["restart", "stop", "update"]
+      },
+      {
+        "id": "brave-search",
+        "name": "Brave Search",
+        "service": "brave-search",
+        "configured": true,
+        "state": "running",
+        "health": "healthy",
+        "statusText": "Up 2 minutes",
+        "containerName": "brave-search",
+        "availableActions": ["restart", "stop", "update"]
       }
     ]
   }
@@ -420,7 +431,8 @@ Return status for docker-compose managed dependencies (currently includes local
 
 Control a docker-compose dependency (`start`, `restart`, `stop`, `update`).
 
-- `update` for `whisper` pulls the latest image and runs `docker compose up -d` to reconcile.
+- `dependency` must match an ID returned by `system.dockerDependencies`.
+- `update` pulls the latest image for that compose service and runs `docker compose up -d` to reconcile.
 
 **Request:**
 ```json