feat: per-class exemplar preview, class hide toggle, container NMS flag (REQ-182, REQ-183, REQ-184)

backend/api/projects.py

@@ -37,6 +37,7 @@ class ProjectPatch(BaseModel):
     prompts: Optional[Dict[int, str]] = None
     val_every: Optional[int] = None
     video_root: Optional[str] = None
+    containers: Optional[Dict[int, bool]] = None
 
 
 @router.get("")
@@ -68,7 +69,8 @@ def patch_project(project_id: int, request: ProjectPatch) -> dict:
     try:
         return project_store.update(project_id, prompts=request.prompts,
                                     val_every=request.val_every,
-                                    video_root=request.video_root)
+                                    video_root=request.video_root,
+                                    containers=request.containers)
     except project_store.ProjectError as exc:
         raise HTTPException(400, str(exc))