ui: auto-clear question after run; add connection-error retry tip

- After Run Research completes, the question textbox is cleared via .then() so the user can immediately ask a follow-up without pressing Clear.
- Added a small hint under the action row: if a connection error appears, wait a moment and retry.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app.py

@@ -975,6 +975,7 @@ gradio-app > div {
 
 /* === Example buttons ==================================================== */
 .example-note { color: var(--q-muted); font-size: 13px; margin: 0 0 12px 0; line-height: 1.5; }
+.connection-tip { color: var(--q-muted); font-size: 13px; margin: 12px 2px 0; line-height: 1.45; }
 .memory-help {
   color: var(--q-muted);
   font-size: 12.5px;
@@ -1931,6 +1932,11 @@ with gr.Blocks(
                     run_btn = gr.Button("Run Research", variant="primary", size="lg")
                     stop_btn = gr.Button("Stop", variant="stop", size="lg")
                     clear_btn = gr.Button("Clear", variant="secondary", size="lg")
+                gr.HTML(
+                    '<div class="connection-tip">'
+                    'If you see a connection error, please wait a moment and retry.'
+                    '</div>'
+                )
 
             with gr.Group(elem_classes="section-card"):
                 gr.HTML(
@@ -2041,6 +2047,12 @@ with gr.Blocks(
         fn=run_ui,
         inputs=[question, max_turns, memory_strategy, temperature],
         outputs=[answer, trace],
+    ).then(
+        # Auto-clear the question textbox once the run finishes so the user
+        # can immediately ask a follow-up without manually pressing Clear.
+        fn=lambda: "",
+        inputs=[],
+        outputs=[question],
     )
     for btn, ex in zip(example_buttons, EXAMPLES):
         btn.click(