refactor: tighten backend, flows, frontend, tests; push flows to Langflow

backend/scripts/sync_flows.py

@@ -42,8 +42,28 @@ async def run_sync(flows_dir: Path) -> SyncReport:
         session.close()
 
 
+async def run_full_pass(flows_dir: Path) -> SyncReport:
+    """Single orchestration: Langflow pull + file sync (shared with API)."""
+    reset_engine()
+    session = Session(get_engine())
+    try:
+        lfx = LfxClient(settings.lfx_url, api_key=settings.lfx_api_key or None)
+        langflow = LangflowClient(settings.langflow_url, api_key=settings.langflow_api_key)
+        return await sync.sync_full_pass(session, lfx, langflow, flows_dir)
+    finally:
+        session.close()
+
+
 async def main_async(args) -> int:
     flows_dir = Path(args.dir or settings.flows_dir)
+    if args.pull and args.sync:
+        try:
+            report = await run_full_pass(flows_dir)
+        except FileNotFoundError as exc:
+            print(f"ERROR: {exc}", file=sys.stderr)
+            return 2
+        print(report.model_dump_json(indent=2))
+        return 1 if report.errors else 0
     if args.pull:
         pulled = await pull_from_langflow(flows_dir)
         print(json.dumps(pulled, indent=2, ensure_ascii=False))