fix: address audit findings across status-line and verbose-mode features

- useStatusLine: clamp used/remaining percentage to [0,100], track
  totalLinesRemoved as trigger, clean up debounceRef on unmount
- AppContainer: use drainQueue from useMessageQueue instead of manual
  messageQueueRef to avoid stale-ref reads between renders
- builtin-agents: add WRITE_FILE tool to statusline-setup agent, improve
  PS1 parsing instructions (unquoted assignments, \[/\]/\e escapes),
  strip ANSI colors, remove unreachable symlink instruction
- CompactToolGroupDisplay: fix misleading hint "show full tool output"
  to "toggle verbose mode" across all 6 locales
- AppContainer.test: add missing drainQueue mock

packages/cli/src/i18n/locales/de.js

@@ -1971,6 +1971,6 @@ export default {
   verbose: 'ausführlich',
   'Show full tool output and thinking in verbose mode (toggle with Ctrl+O).':
     'Vollständige Tool-Ausgabe und Denkprozess im ausführlichen Modus anzeigen (mit Strg+O umschalten).',
-  'Press Ctrl+O to show full tool output':
-    'Strg+O für vollständige Tool-Ausgabe drücken',
+  'Press Ctrl+O to toggle verbose mode':
+    'Strg+O zum Umschalten des ausführlichen Modus drücken',
 };

packages/cli/src/i18n/locales/en.js

@@ -2011,6 +2011,5 @@ export default {
   verbose: 'verbose',
   'Show full tool output and thinking in verbose mode (toggle with Ctrl+O).':
     'Show full tool output and thinking in verbose mode (toggle with Ctrl+O).',
-  'Press Ctrl+O to show full tool output':
-    'Press Ctrl+O to show full tool output',
+  'Press Ctrl+O to toggle verbose mode': 'Press Ctrl+O to toggle verbose mode',
 };

packages/cli/src/i18n/locales/ja.js

@@ -1463,5 +1463,5 @@ export default {
   verbose: '詳細',
   'Show full tool output and thinking in verbose mode (toggle with Ctrl+O).':
     '詳細モードで完全なツール出力と思考を表示します（Ctrl+O で切り替え）。',
-  'Press Ctrl+O to show full tool output': 'Ctrl+O で完全なツール出力を表示',
+  'Press Ctrl+O to toggle verbose mode': 'Ctrl+O で詳細モードを切り替え',
 };

packages/cli/src/i18n/locales/pt.js

@@ -1961,6 +1961,6 @@ export default {
   verbose: 'detalhado',
   'Show full tool output and thinking in verbose mode (toggle with Ctrl+O).':
     'Mostrar saída completa da ferramenta e raciocínio no modo detalhado (alternar com Ctrl+O).',
-  'Press Ctrl+O to show full tool output':
-    'Pressione Ctrl+O para exibir a saída completa da ferramenta',
+  'Press Ctrl+O to toggle verbose mode':
+    'Pressione Ctrl+O para alternar o modo detalhado',
 };

packages/cli/src/i18n/locales/ru.js

@@ -1968,6 +1968,6 @@ export default {
   verbose: 'подробный',
   'Show full tool output and thinking in verbose mode (toggle with Ctrl+O).':
     'Показывать полный вывод инструментов и процесс рассуждений в подробном режиме (переключить с помощью Ctrl+O).',
-  'Press Ctrl+O to show full tool output':
-    'Нажмите Ctrl+O для показа полного вывода инструментов',
+  'Press Ctrl+O to toggle verbose mode':
+    'Нажмите Ctrl+O для переключения подробного режима',
 };

packages/cli/src/i18n/locales/zh.js

@@ -1816,5 +1816,5 @@ export default {
   verbose: '详细',
   'Show full tool output and thinking in verbose mode (toggle with Ctrl+O).':
     '详细模式下显示完整工具输出和思考过程（Ctrl+O 切换）。',
-  'Press Ctrl+O to show full tool output': '按 Ctrl+O 查看详细工具调用结果',
+  'Press Ctrl+O to toggle verbose mode': '按 Ctrl+O 切换详细模式',
 };

packages/cli/src/ui/AppContainer.test.tsx

@@ -243,6 +243,7 @@ describe('AppContainer State Management', () => {
       addMessage: vi.fn(),
       clearQueue: vi.fn(),
       getQueuedMessagesText: vi.fn().mockReturnValue(''),
+      drainQueue: vi.fn().mockReturnValue([]),
     });
     mockedUseAutoAcceptIndicator.mockReturnValue(false);
     mockedUseGitBranchName.mockReturnValue('main');
@@ -455,6 +456,7 @@ describe('AppContainer State Management', () => {
         addMessage: mockQueueMessage,
         clearQueue: vi.fn(),
         getQueuedMessagesText: vi.fn().mockReturnValue(''),
+        drainQueue: vi.fn().mockReturnValue([]),
       });
 
       render(

packages/cli/src/ui/AppContainer.tsx

@@ -776,24 +776,22 @@ export const AppContainer = (props: AppContainerProps) => {
     disabled: agentViewState.activeView !== 'main',
   });
 
-  const { messageQueue, addMessage, clearQueue, getQueuedMessagesText } =
-    useMessageQueue({
-      isConfigInitialized,
-      streamingState,
-      submitQuery,
-    });
+  const {
+    messageQueue,
+    addMessage,
+    clearQueue,
+    getQueuedMessagesText,
+    drainQueue,
+  } = useMessageQueue({
+    isConfigInitialized,
+    streamingState,
+    submitQuery,
+  });
 
   // Bridge message queue to mid-turn drain via ref.
-  // Sync ref on every render so the drain callback always reads latest state.
-  const messageQueueRef = useRef(messageQueue);
-  messageQueueRef.current = messageQueue;
-  midTurnDrainRef.current = () => {
-    const queue = messageQueueRef.current;
-    if (queue.length === 0) return [];
-    messageQueueRef.current = [];
-    clearQueue();
-    return [...queue];
-  };
+  // drainQueue reads from the synchronous queueRef inside useMessageQueue,
+  // so it always sees the latest state even between renders.
+  midTurnDrainRef.current = drainQueue;
 
   // Callback for handling final submit (must be after addMessage from useMessageQueue)
   const handleFinalSubmit = useCallback(

packages/cli/src/ui/components/messages/CompactToolGroupDisplay.tsx

@@ -101,7 +101,7 @@ export const CompactToolGroupDisplay: React.FC<
 
       {/* Hint line */}
       <Text color={theme.text.secondary}>
-        {t('Press Ctrl+O to show full tool output')}
+        {t('Press Ctrl+O to toggle verbose mode')}
       </Text>
     </Box>
   );

packages/cli/src/ui/hooks/useStatusLine.ts

@@ -175,6 +175,8 @@ export function useStatusLine(): {
   const { currentModel, branchName } = uiState;
   const totalToolCalls = uiState.sessionStats.metrics.tools.totalCalls;
   const totalLinesAdded = uiState.sessionStats.metrics.files.totalLinesAdded;
+  const totalLinesRemoved =
+    uiState.sessionStats.metrics.files.totalLinesRemoved;
   const effectiveVim = vimEnabled ? vimMode : undefined;
   const prevStateRef = useRef<{
     promptTokenCount: number;
@@ -183,6 +185,7 @@ export function useStatusLine(): {
     branchName: string | undefined;
     totalToolCalls: number;
     totalLinesAdded: number;
+    totalLinesRemoved: number;
   }>({
     promptTokenCount: lastPromptTokenCount,
     currentModel,
@@ -190,6 +193,7 @@ export function useStatusLine(): {
     branchName,
     totalToolCalls,
     totalLinesAdded,
+    totalLinesRemoved,
   });
 
   // Guard: when true, the mount effect has already called doUpdate so the
@@ -216,8 +220,15 @@ export function useStatusLine(): {
       cfg.getContentGeneratorConfig()?.contextWindowSize || 0;
     const usedPercentage =
       contextWindowSize > 0
-        ? Math.round((stats.lastPromptTokenCount / contextWindowSize) * 1000) /
-          10
+        ? Math.min(
+            100,
+            Math.max(
+              0,
+              Math.round(
+                (stats.lastPromptTokenCount / contextWindowSize) * 1000,
+              ) / 10,
+            ),
+          )
         : 0;
 
     let totalInputTokens = 0;
@@ -238,9 +249,15 @@ export function useStatusLine(): {
         used_percentage: usedPercentage,
         remaining_percentage:
           contextWindowSize > 0
-            ? Math.round(
-                (1 - stats.lastPromptTokenCount / contextWindowSize) * 1000,
-              ) / 10
+            ? Math.min(
+                100,
+                Math.max(
+                  0,
+                  Math.round(
+                    (1 - stats.lastPromptTokenCount / contextWindowSize) * 1000,
+                  ) / 10,
+                ),
+              )
             : 100,
         current_usage: stats.lastPromptTokenCount,
         total_input_tokens: totalInputTokens,
@@ -256,7 +273,7 @@ export function useStatusLine(): {
       }),
       metrics: buildMetricsPayload(m),
       ...(vimEnabledRef.current && {
-        vim: { mode: vimModeRef.current ?? 'INSERT' },
+        vim: { mode: vimModeRef.current },
       }),
     };
 
@@ -328,7 +345,8 @@ export function useStatusLine(): {
       effectiveVim !== prev.effectiveVim ||
       branchName !== prev.branchName ||
       totalToolCalls !== prev.totalToolCalls ||
-      totalLinesAdded !== prev.totalLinesAdded
+      totalLinesAdded !== prev.totalLinesAdded ||
+      totalLinesRemoved !== prev.totalLinesRemoved
     ) {
       prev.promptTokenCount = lastPromptTokenCount;
       prev.currentModel = currentModel;
@@ -336,6 +354,7 @@ export function useStatusLine(): {
       prev.branchName = branchName;
       prev.totalToolCalls = totalToolCalls;
       prev.totalLinesAdded = totalLinesAdded;
+      prev.totalLinesRemoved = totalLinesRemoved;
       scheduleUpdate();
     }
   }, [
@@ -346,6 +365,7 @@ export function useStatusLine(): {
     branchName,
     totalToolCalls,
     totalLinesAdded,
+    totalLinesRemoved,
     scheduleUpdate,
   ]);
 
@@ -379,6 +399,7 @@ export function useStatusLine(): {
       genRef.current++;
       if (debounceRef.current !== undefined) {
         clearTimeout(debounceRef.current);
+        debounceRef.current = undefined;
       }
     };
     // eslint-disable-next-line react-hooks/exhaustive-deps