feat: add enableWelcomeBack setting to control welcome back dialog

- Add enableWelcomeBack boolean setting to settings schema with default true
- Update useWelcomeBack hook to respect the enableWelcomeBack setting
- Pass settings to useWelcomeBack hook in App component
- Update settings schema test to include the new enableWelcomeBack setting
- Allow users to disable the welcome back dialog through settings

packages/cli/src/config/settingsSchema.test.ts

@@ -52,6 +52,7 @@ describe('SettingsSchema', () => {
         'model',
         'hasSeenIdeIntegrationNudge',
         'folderTrustFeature',
+        'enableWelcomeBack',
       ];
 
       expectedSettings.forEach((setting) => {

packages/cli/src/config/settingsSchema.ts

@@ -604,6 +604,16 @@ export const SETTINGS_SCHEMA = {
     description: 'Skip the next speaker check.',
     showInDialog: true,
   },
+  enableWelcomeBack: {
+    type: 'boolean',
+    label: 'Enable Welcome Back',
+    category: 'UI',
+    requiresRestart: false,
+    default: true,
+    description:
+      'Show welcome back dialog when returning to a project with conversation history.',
+    showInDialog: true,
+  },
 } as const;
 
 type InferSettings<T extends SettingsSchema> = {

packages/cli/src/ui/App.tsx

@@ -624,7 +624,7 @@ const App = ({ config, settings, startupWarnings = [], version }: AppProps) => {
     welcomeBackChoice,
     handleWelcomeBackSelection,
     handleWelcomeBackClose,
-  } = useWelcomeBack(config, submitQuery, buffer);
+  } = useWelcomeBack(config, submitQuery, buffer, settings.merged);
 
   // Message queue for handling input during streaming
   const { messageQueue, addMessage, clearQueue, getQueuedMessagesText } =

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

@@ -10,6 +10,7 @@ import {
   type ProjectSummaryInfo,
   type Config,
 } from '@qwen-code/qwen-code-core';
+import { type Settings } from '../../config/settingsSchema.js';
 
 export interface WelcomeBackState {
   welcomeBackInfo: ProjectSummaryInfo | null;
@@ -30,6 +31,7 @@ export function useWelcomeBack(
   config: Config,
   submitQuery: (query: string) => void,
   buffer: { setText: (text: string) => void },
+  settings: Settings,
 ): WelcomeBackState & WelcomeBackActions {
   const [welcomeBackInfo, setWelcomeBackInfo] =
     useState<ProjectSummaryInfo | null>(null);
@@ -42,6 +44,11 @@ export function useWelcomeBack(
 
   // Check for conversation history on startup
   const checkWelcomeBack = useCallback(async () => {
+    // Check if welcome back is enabled in settings
+    if (settings.enableWelcomeBack === false) {
+      return;
+    }
+
     try {
       const info = await getProjectSummaryInfo();
       if (info.hasHistory) {
@@ -52,7 +59,7 @@ export function useWelcomeBack(
       // Silently ignore errors - welcome back is not critical
       console.debug('Welcome back check failed:', error);
     }
-  }, []);
+  }, [settings.enableWelcomeBack]);
 
   // Handle welcome back dialog selection
   const handleWelcomeBackSelection = useCallback(