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>

README.md

@@ -3,8 +3,8 @@
 A self-hosted Docker Compose manager for power users and homelab enthusiasts —
 as intuitive as Dockge, as capable as Portainer for Compose workflows.
 
-> **Status:** Phase 1 (Core) complete. Volume/GPU wizards, image-update checks,
-> templates, multi-host agents and backups land in later phases.
+> **Status:** Phase 1 (Core) + Phase 2 (Volumes & GPU) complete. Image-update
+> checks, templates, multi-host agents and backups land in later phases.
 
 ## What works today (Phase 1)
 
@@ -25,6 +25,22 @@ as intuitive as Dockge, as capable as Portainer for Compose workflows.
   dir containing a compose file) are picked up automatically.
 - **Dark / light theme.**
 
+### Phase 2 — Volumes & GPU
+
+- **Volume Wizard** in the editor (right-hand helper panel): Bind / Named / NFS /
+  SMB-CIFS / tmpfs, with a sandboxed **host path browser** for bind mounts and a
+  live YAML preview. NFS/SMB `driver_opts` are generated for you.
+- **GPU assignment** per service: auto-detects NVIDIA (`nvidia-smi`) and AMD/Intel
+  (`/dev/dri` + sysfs), injects the right YAML (NVIDIA `deploy.reservations`, or
+  `/dev/dri` passthrough + render/video groups + `LIBVA_DRIVER_NAME=iHD` for Intel).
+- **Device passthrough**: lists host USB / serial-TTY / DRI nodes, add per service,
+  plus a guarded `privileged` toggle.
+- All wizard edits are merged into the compose YAML **server-side** (robust,
+  validated) and returned to the editor for review before saving.
+
+> GPU/device detection needs host visibility. The bundled compose bind-mounts
+> `/dev:/dev:ro`; NVIDIA additionally requires the NVIDIA container runtime on the host.
+
 ## Architecture
 
 ```
@@ -91,10 +107,19 @@ GET    /api/stacks/{id}                          PUT /api/stacks/{id}   DELETE /
 POST   /api/stacks/{id}/{start|stop|restart|pull|update|down|clone}
 GET    /api/stacks/{id}/logs                     GET /api/stacks/{id}/export
 POST   /api/stacks/convert                       (docker run → compose)
-GET    /api/system/info                          GET /api/audit
+GET    /api/system/info | gpus | devices         GET /api/audit
 WS     /ws/logs/{stack_id}[/{service}]           WS  /ws/events
 ```
 
+### Phase 2 endpoints
+
+```
+GET    /api/volumes | /orphaned                  DELETE /api/volumes/{name}
+POST   /api/volumes/prune                        POST /api/volumes/generate-yaml
+GET    /api/host/paths?path=&show_hidden=        (sandboxed browser)
+POST   /api/editor/services | add-volume | set-gpu | add-device | remove-device | set-privileged
+```
+
 ## Security notes
 
 - The Docker socket is only ever touched by the backend process; it is never