add indent

app.py

@@ -180,13 +180,13 @@ with gr.Blocks() as demo:
     answer_box   = gr.Textbox(lines=6, label="Assistant reply")
 
     answer_btn.click(
-    fn=lambda sys, ctx, q, uid, h: answer(sys,
-        [line.strip() for line in ctx.splitlines() if line.strip()],
-        q, uid, h
-    ),
-    inputs=[system_box, context_box, question_box, user_id_box, history_cb],
-    outputs=answer_box
-)
+        fn=lambda sys, ctx, q, uid, h: answer(sys,
+            [line.strip() for line in ctx.splitlines() if line.strip()],
+            q, uid, h
+        ),
+        inputs=[system_box, context_box, question_box, user_id_box, history_cb],
+        outputs=answer_box
+    )
 
 # ---------- 3. FastAPI layer --------------------------------------------------
 class IngestReq(BaseModel):