rebuild(stage-9): deliver deterministic intelligent screening

next/backend/features/accounts/auth.py

@@ -65,3 +65,15 @@ def require_smart_access(
 
 
 SmartAccessPrincipal = Annotated[Principal, Depends(require_smart_access)]
+
+
+def require_smart_write(
+    request: Request,
+    principal: CsrfPrincipal,
+) -> Principal:
+    if not request.app.state.container.memberships.can_use_smart_features(principal):
+        raise AppError("membership_required", "该功能仅对会员开放。", 403)
+    return principal
+
+
+SmartWritePrincipal = Annotated[Principal, Depends(require_smart_write)]