feat: SAC 0.7.4 sidebar system stats block with UI toggle

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/api/v1/settings.py

@@ -28,6 +28,10 @@ from app.services.event_severity_overrides import (
     list_severity_override_items,
     replace_severity_overrides,
 )
+from app.services.ui_settings import (
+    get_effective_ui_settings,
+    upsert_ui_settings,
+)
 
 router = APIRouter(prefix="/settings", tags=["settings"])
 
@@ -392,3 +396,37 @@ def update_severity_overrides(
         ],
         source=SOURCE_DB,
     )
+
+
+class UiSettingsResponse(BaseModel):
+    show_sidebar_system_stats: bool
+    source: str = Field(description="db или default")
+
+
+class UiSettingsUpdate(BaseModel):
+    show_sidebar_system_stats: bool
+
+
+@router.get("/ui", response_model=UiSettingsResponse)
+def get_ui_settings(
+    db: Session = Depends(get_db),
+    _user=Depends(require_admin),
+) -> UiSettingsResponse:
+    cfg = get_effective_ui_settings(db)
+    return UiSettingsResponse(
+        show_sidebar_system_stats=cfg.show_sidebar_system_stats,
+        source=cfg.source,
+    )
+
+
+@router.put("/ui", response_model=UiSettingsResponse)
+def update_ui_settings(
+    body: UiSettingsUpdate,
+    db: Session = Depends(get_db),
+    _user=Depends(require_admin),
+) -> UiSettingsResponse:
+    cfg = upsert_ui_settings(db, show_sidebar_system_stats=body.show_sidebar_system_stats)
+    return UiSettingsResponse(
+        show_sidebar_system_stats=cfg.show_sidebar_system_stats,
+        source=cfg.source,
+    )