Phase 2: Volume Wizard, GPU & device passthrough (0.2.0)

Backend:
- gpu_service: detect NVIDIA (nvidia-smi) + AMD/Intel (/dev/dri, sysfs);
  inject helpers (nvidia deploy.reservations, /dev/dri + groups + LIBVA)
- volume_service: list/orphaned/prune volumes; NFS/SMB/named/bind/tmpfs
  YAML generation (generate-yaml)
- device_service: USB/TTY/DRI detection + sandboxed host path browser
- compose_edit_service: server-side merge of volume/gpu/device fragments
- routers: volumes (+host paths), editor (services/add-volume/set-gpu/
  add-device/remove-device/set-privileged), system gpus+devices
- compose: bind-mount /dev:ro for detection

Frontend:
- split-pane StackEditor with helper panel (service picker + tabs)
- VolumeWizard (bind/named/nfs/smb/tmpfs) + HostPathBrowser
- GPUSelector, DevicePanel; api clients for volumes/editor/system

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/main.py

@@ -12,7 +12,7 @@ from sqlmodel import Session
 from config import settings
 from database import engine, init_db
 from docker_client import DockerError
-from routers import audit, auth, stacks, system, ws
+from routers import audit, auth, editor, stacks, system, volumes, ws
 
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger("stackpilot")
@@ -31,7 +31,7 @@ async def lifespan(app: FastAPI):
     yield
 
 
-app = FastAPI(title="StackPilot", version="0.1.1", lifespan=lifespan)
+app = FastAPI(title="StackPilot", version="0.2.0", lifespan=lifespan)
 
 app.add_middleware(
     CORSMiddleware,
@@ -53,6 +53,8 @@ async def docker_error_handler(_request: Request, exc: DockerError):
 app.include_router(auth.router)
 app.include_router(stacks.router)
 app.include_router(system.router)
+app.include_router(volumes.router)
+app.include_router(editor.router)
 app.include_router(audit.router)
 app.include_router(ws.router)