feat(admin): one-click sources sync — admin-only button triggers git clone/pull + re-import + KB overview refresh with polled live status

app/main.py

@@ -25,6 +25,7 @@ from app.api.docs import router as docs_router
 from app.api.health import router as health_router
 from app.api.steering import router as steering_router
 from app.api.suggestions import router as suggestions_router
+from app.api.sync import router as sync_router
 from app.config import get_settings
 from app.core.auth import ensure_admin_configured
 from app.core.debugging import configure_debugging
@@ -64,6 +65,7 @@ def create_app() -> FastAPI:
     app.include_router(docs_router, prefix="/api")
     app.include_router(chat_router, prefix="/api")
     app.include_router(steering_router, prefix="/api")
+    app.include_router(sync_router, prefix="/api")
 
     static_dir = Path(settings.static_dir).resolve()
     if static_dir.is_dir():