v2.1.0-provider-picker: BooCoder systemd migration + provider picker

- BooCoder moves from Docker to host systemd service (boocoder.service)
- Agent dispatch (ACP + PTY) switches from SSH to direct spawn/exec
- SSH helpers marked @deprecated (kept for one release cycle)
- Provider registry (5 providers: boocode, opencode, goose, claude, qwen)
- Agent probe with direct which/exec + model discovery (qwen settings, static claude models)
- GET /api/providers route with installed status, models, transport fallback
- ProviderPicker frontend component in CoderPane header
- External provider messages route through tasks row instead of inference enqueue
- Smart scroll: MessageList only auto-scrolls when near bottom (150px threshold)
- DB: available_agents gets models, label, transport columns
- Bug fix: loadContext SELECT includes allowed_read_paths
- Bug fix: cap hit sentinel inserted before buildMessagesPayload
- docker-compose.yml: boocoder service commented out, BOOCODER_URL env var added
- CLAUDE.md: updated docs for systemd, provider registry, JSONB gotcha, loadContext

docker-compose.yml

@@ -10,6 +10,7 @@ services:
       CODECONTEXT_URL: http://codecontext:8080
       CONTAINER_GUIDANCE_FILE: /app/BOOCHAT.md
       DATABASE_URL: postgres://boocode:${POSTGRES_PASSWORD}@boocode_db:5432/boochat
+      BOOCODER_URL: http://100.114.205.53:9502
     volumes:
       - /opt:/opt
       - /opt/projects:/opt/projects:rw
@@ -50,27 +51,29 @@ services:
     networks:
       - boocode_net
 
-  boocoder:
-    build:
-      context: .
-      dockerfile: apps/coder/Dockerfile
-    container_name: boocoder
-    restart: unless-stopped
-    ports:
-      - "100.114.205.53:9502:3000"
-    env_file: .env
-    environment:
-      CONTAINER_GUIDANCE_FILE: /app/BOOCODER.md
-      DATABASE_URL: postgres://boocode:${POSTGRES_PASSWORD}@boocode_db:5432/boochat
-    volumes:
-      - /opt:/opt:rw
-      - /opt/projects:/opt/projects:rw
-      - ./data:/data
-      - /opt/boocode/BOOCODER.md:/app/BOOCODER.md:ro
-    depends_on:
-      - boocode_db
-    networks:
-      - boocode_net
+  # v2.1.1: boocoder moved to systemd service on host (boocoder.service).
+  # Kept commented for rollback reference.
+  # boocoder:
+  #   build:
+  #     context: .
+  #     dockerfile: apps/coder/Dockerfile
+  #   container_name: boocoder
+  #   restart: unless-stopped
+  #   ports:
+  #     - "100.114.205.53:9502:3000"
+  #   env_file: .env
+  #   environment:
+  #     CONTAINER_GUIDANCE_FILE: /app/BOOCODER.md
+  #     DATABASE_URL: postgres://boocode:${POSTGRES_PASSWORD}@boocode_db:5432/boochat
+  #   volumes:
+  #     - /opt:/opt:rw
+  #     - /opt/projects:/opt/projects:rw
+  #     - ./data:/data
+  #     - /opt/boocode/BOOCODER.md:/app/BOOCODER.md:ro
+  #   depends_on:
+  #     - boocode_db
+  #   networks:
+  #     - boocode_net
 
   boocode_db:
     image: postgres:16-alpine