Refine request_user_input TUI interactions and option UX (#10025)

## Summary
Overhaul the ask‑user‑questions TUI to support “Other/None” answers,
better notes handling, improved option selection
UX, and a safer submission flow with confirmation for unanswered
questions.

Multiple choice (number keys for quick selection, up/down or jk for
cycling through options):
<img width="856" height="169" alt="Screenshot 2026-01-27 at 7 22 29 PM"
src="https://github.com/user-attachments/assets/cabd1b0e-25e0-4859-bd8f-9941192ca274"
/>

Tab to add notes:
<img width="856" height="197" alt="Screenshot 2026-01-27 at 7 22 45 PM"
src="https://github.com/user-attachments/assets/a807db5e-e966-412c-af91-6edc60062f35"
/>

Freeform (also note enter tooltip is highlighted on last question to
indicate questions UI will be exited upon submission):
<img width="854" height="112" alt="Screenshot 2026-01-27 at 7 23 13 PM"
src="https://github.com/user-attachments/assets/2e7b88bf-062b-4b9f-a9da-c9d8c8a59643"
/>

Confirmation dialogue (submitting with unanswered questions):
<img width="854" height="126" alt="Screenshot 2026-01-27 at 7 23 29 PM"
src="https://github.com/user-attachments/assets/93965c8f-54ac-45bc-a660-9625bcd101f8"
/>

## Key Changes
- **Options UI refresh**
- Render options as numbered entries; allow number keys to select &
submit.
- Remove “Option X/Y” header and allow the question UI height to expand
naturally.
- Keep spacing between question, options, and notes even when notes are
visible.
- Hide the title line and render the question prompt in cyan **only when
uncommitted**.

- **“Other / None of the above” support**
  - Wire `isOther` to add “None of the above”.
  - Add guidance text: “Optionally, add details in notes (tab).”

- **Notes composer UX**
- Remove “Notes” heading; place composer directly under the selected
option.
- Preserve pending paste placeholders across question navigation and
after submission.
  - Ctrl+C clears notes **only when the notes composer has focus**.
  - Ctrl+C now triggers an immediate redraw so the clear is visible.

- **Committed vs uncommitted state**
  - Introduce a unified `answer_committed` flag per question.
- Editing notes (including adding text or pastes) marks the answer
uncommitted.
- Changing the option highlight (j/k, up/down) marks the answer
uncommitted.
  - Clearing options (Backspace/Delete) also clears pending notes.
  - Question prompt turns cyan only when the answer is uncommitted.

- **Submission safety & confirmation**
  - Only submit notes/freeform text once explicitly committed.
- Last-question submit with unanswered questions shows a confirmation
dialog.
  - Confirmation options:
    1. **Proceed** (default)
    2. **Go back**
  - Description reflects count: “Submit with N unanswered question(s).”
  - Esc/Backspace in confirmation returns to first unanswered question.
  - Ctrl+C in confirmation interrupts and exits the overlay.

- **Footer hints**
- Cyan highlight restored for “enter to submit answer” / “enter to
submit all”.

## Codex author
`codex fork 019c00ed-323a-7000-bdb5-9f9c5a635bd9`

codex-rs/tui/src/bottom_pane/mod.rs

@@ -269,7 +269,10 @@ impl BottomPane {
             let (ctrl_c_completed, view_complete, view_in_paste_burst) = {
                 let last_index = self.view_stack.len() - 1;
                 let view = &mut self.view_stack[last_index];
+                let prefer_esc =
+                    key_event.code == KeyCode::Esc && view.prefer_esc_to_handle_key_event();
                 let ctrl_c_completed = key_event.code == KeyCode::Esc
+                    && !prefer_esc
                     && matches!(view.on_ctrl_c(), CancellationEvent::Handled)
                     && view.is_complete();
                 if ctrl_c_completed {
@@ -338,6 +341,7 @@ impl BottomPane {
                     self.on_active_view_complete();
                 }
                 self.show_quit_shortcut_hint(key_hint::ctrl(KeyCode::Char('c')));
+                self.request_redraw();
             }
             event
         } else if self.composer_is_empty() {
@@ -346,6 +350,7 @@ impl BottomPane {
             self.view_stack.pop();
             self.clear_composer_for_ctrl_c();
             self.show_quit_shortcut_hint(key_hint::ctrl(KeyCode::Char('c')));
+            self.request_redraw();
             CancellationEvent::Handled
         }
     }
@@ -815,7 +820,9 @@ mod tests {
     use insta::assert_snapshot;
     use ratatui::buffer::Buffer;
     use ratatui::layout::Rect;
+    use std::cell::Cell;
     use std::path::PathBuf;
+    use std::rc::Rc;
     use tokio::sync::mpsc::unbounded_channel;
 
     fn snapshot_buffer(buf: &Buffer) -> String {
@@ -1242,4 +1249,63 @@ mod tests {
             "expected Esc to send Op::Interrupt while a task is running"
         );
     }
+
+    #[test]
+    fn esc_routes_to_handle_key_event_when_requested() {
+        #[derive(Default)]
+        struct EscRoutingView {
+            on_ctrl_c_calls: Rc<Cell<usize>>,
+            handle_calls: Rc<Cell<usize>>,
+        }
+
+        impl Renderable for EscRoutingView {
+            fn render(&self, _area: Rect, _buf: &mut Buffer) {}
+
+            fn desired_height(&self, _width: u16) -> u16 {
+                0
+            }
+        }
+
+        impl BottomPaneView for EscRoutingView {
+            fn handle_key_event(&mut self, _key_event: KeyEvent) {
+                self.handle_calls
+                    .set(self.handle_calls.get().saturating_add(1));
+            }
+
+            fn on_ctrl_c(&mut self) -> CancellationEvent {
+                self.on_ctrl_c_calls
+                    .set(self.on_ctrl_c_calls.get().saturating_add(1));
+                CancellationEvent::Handled
+            }
+
+            fn prefer_esc_to_handle_key_event(&self) -> bool {
+                true
+            }
+        }
+
+        let (tx_raw, _rx) = unbounded_channel::<AppEvent>();
+        let tx = AppEventSender::new(tx_raw);
+        let mut pane = BottomPane::new(BottomPaneParams {
+            app_event_tx: tx,
+            frame_requester: FrameRequester::test_dummy(),
+            has_input_focus: true,
+            enhanced_keys_supported: false,
+            placeholder_text: "Ask Codex to do anything".to_string(),
+            disable_paste_burst: false,
+            animations_enabled: true,
+            skills: Some(Vec::new()),
+        });
+
+        let on_ctrl_c_calls = Rc::new(Cell::new(0));
+        let handle_calls = Rc::new(Cell::new(0));
+        pane.push_view(Box::new(EscRoutingView {
+            on_ctrl_c_calls: Rc::clone(&on_ctrl_c_calls),
+            handle_calls: Rc::clone(&handle_calls),
+        }));
+
+        pane.handle_key_event(KeyEvent::new(KeyCode::Esc, KeyModifiers::NONE));
+
+        assert_eq!(on_ctrl_c_calls.get(), 0);
+        assert_eq!(handle_calls.get(), 1);
+    }
 }