Show a short, neutral TUI interruption notice (#48830)

## What changed

Render interrupted turns with secondary text styling and shorter wording,
removing the suggestion to tell the model what to do differently.

## Testing

Update interruption snapshots and assert that the notice uses secondary text
styling.

GitOrigin-RevId: 7cb042ed9e6781d107a93d5677fa193f082c764d

codex-rs/tui/src/app/tests/snapshots/codex_tui__app__tests__math_interruption_tests__answer_math_narrow.snap

@@ -8,4 +8,4 @@ expression: rendered
   \frac{a+b+c+d+e+f}
   {g+h}
 
-■ Conversation interrupted - tell the model what to do differently. Something went wrong? Hit `/feedback` to report the issue.
+■ Conversation interrupted - use /feedback if something went wrong

codex-rs/tui/src/app/tests/snapshots/codex_tui__app__tests__math_interruption_tests__plan_math_narrow.snap

@@ -12,4 +12,4 @@ expression: rendered
   f}{g+h}
  
 
-■ Conversation interrupted - tell the model what to do differently. Something went wrong? Hit `/feedback` to report the issue.
+■ Conversation interrupted - use /feedback if something went wrong

codex-rs/tui/src/chatwidget/input_restore.rs

@@ -323,9 +323,17 @@ impl ChatWidget {
                     /*hint*/ None,
                 ));
             } else {
-                self.add_to_history(history_cell::new_error_event(
-                    self.interrupted_turn_message(reason),
-                ));
+                self.add_to_history(match reason {
+                    TurnAbortReason::BudgetLimited => history_cell::new_error_event(
+                        "Goal budget reached - the turn was stopped.".to_string(),
+                    ),
+                    TurnAbortReason::Interrupted => PlainHistoryCell::new(vec![
+                        Line::from(
+                            "■ Conversation interrupted - use /feedback if something went wrong",
+                        )
+                        .style(crate::style::secondary_text_style()),
+                    ]),
+                });
             }
         }
 

codex-rs/tui/src/chatwidget/snapshots/codex_tui__chatwidget__tests__interrupt_preserves_unified_exec_wait_streak.snap

@@ -1,6 +1,6 @@
 ---
-source: tui/src/chatwidget/tests.rs
+source: tui/src/chatwidget/tests/exec_flow.rs
 expression: snapshot
 ---
 cells=1
-■ Conversation interrupted - tell the model what to do differently. Something went wrong? Hit `/feedback` to report the issue.
+■ Conversation interrupted - use /feedback if something went wrong

codex-rs/tui/src/chatwidget/snapshots/codex_tui__chatwidget__tests__interrupted_turn_error_message.snap

@@ -1,5 +1,5 @@
 ---
-source: tui/src/chatwidget/tests.rs
+source: tui/src/chatwidget/tests/review_mode.rs
 expression: last
 ---
-■ Conversation interrupted - tell the model what to do differently. Something went wrong? Hit `/feedback` to report the issue.
+■ Conversation interrupted - use /feedback if something went wrong

codex-rs/tui/src/chatwidget/tests/composer_submission.rs

@@ -1670,7 +1670,7 @@ fn interrupted_history(
     }
     let history = history.join("\n");
     assert!(
-        history.contains("Conversation interrupted - tell the model what to do differently."),
+        history.contains("Conversation interrupted"),
         "expected normal interruption notice, got {history:?}"
     );
     (saw_prompt, history)

codex-rs/tui/src/chatwidget/tests/review_mode.rs

@@ -1218,8 +1218,7 @@ async fn interrupt_exec_marks_failed_snapshot() {
     assert_chatwidget_snapshot!("interrupt_exec_marks_failed", exec_blob);
 }
 
-// Snapshot test: after an interrupted turn, a gentle error message is inserted
-// suggesting the user to tell the model what to do differently and to use /feedback.
+// Interruptions show a short, neutral notice with the feedback command.
 #[tokio::test]
 async fn interrupted_turn_error_message_snapshot() {
     let (mut chat, mut rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
@@ -1233,9 +1232,18 @@ async fn interrupted_turn_error_message_snapshot() {
     let cells = drain_insert_history(&mut rx);
     assert!(
         !cells.is_empty(),
-        "expected error message to be inserted after interruption"
+        "expected notice to be inserted after interruption"
     );
-    let last = lines_to_single_string(cells.last().unwrap());
+    let last = cells.last().unwrap();
+    let line = last.last().unwrap();
+    assert_eq!(
+        line.spans
+            .iter()
+            .map(|span| line.style.patch(span.style))
+            .collect::<Vec<_>>(),
+        vec![crate::style::secondary_text_style(); line.spans.len()]
+    );
+    let last = lines_to_single_string(last);
     assert_chatwidget_snapshot!("interrupted_turn_error_message", last);
 }
 
@@ -1336,9 +1344,7 @@ async fn budget_limited_turn_restores_queued_input_without_submitting() {
     assert_no_submit_op(&mut op_rx);
 }
 
-// Snapshot test: interrupting specifically to submit pending steers shows an
-// informational banner instead of the generic "tell the model what to do
-// differently" error prompt.
+// Interrupting to submit pending steers shows the steer-specific notice.
 #[tokio::test]
 async fn interrupted_turn_pending_steers_message_snapshot() {
     let (mut chat, mut rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;

codex-rs/tui/src/chatwidget/tests/side.rs

@@ -41,7 +41,7 @@ async fn suppressed_interrupted_turn_notice_skips_history_warning() {
     assert!(
         inserted.iter().all(|cell| {
             let rendered = lines_to_single_string(cell);
-            !rendered.contains("Conversation interrupted - tell the model what to do differently.")
+            !rendered.contains("Conversation interrupted")
                 && !rendered.contains("Model interrupted to submit steer instructions.")
         }),
         "unexpected interrupted-turn notice in side conversation: {inserted:?}"

codex-rs/tui/src/chatwidget/tests/snapshots/codex_tui__chatwidget__tests__composer_submission__output_free_ctrl_c_interrupt_keeps_prompt_and_blank_composer.snap

@@ -7,6 +7,6 @@ history:
 › revise this prompt
 
 
-■ Conversation interrupted - tell the model what to do differently. Something went wrong? Hit `/feedback` to report the issue.
+■ Conversation interrupted - use /feedback if something went wrong
 
 composer:

codex-rs/tui/src/chatwidget/tests/snapshots/codex_tui__chatwidget__tests__history_replay__replayed_nested_review_prompts.snap

@@ -14,7 +14,7 @@ expression: rendered
 › current changes
 
 
-■ Conversation interrupted - tell the model what to do differently. Something went wrong? Hit `/feedback` to report the issue.
+■ Conversation interrupted - use /feedback if something went wrong
 
 >> Code review started: current changes <<
 

codex-rs/tui/src/chatwidget/turn_runtime.rs

@@ -556,12 +556,4 @@ impl ChatWidget {
         self.refresh_status_surfaces();
         self.add_to_history(history_cell::new_plan_update(update));
     }
-
-    pub(super) fn interrupted_turn_message(&self, reason: TurnAbortReason) -> String {
-        if reason == TurnAbortReason::BudgetLimited {
-            return "Goal budget reached - the turn was stopped.".to_string();
-        }
-
-        "Conversation interrupted - tell the model what to do differently. Something went wrong? Hit `/feedback` to report the issue.".to_string()
-    }
 }