fix(cli): disable follow-up suggestions by default

Most Qwen OAuth users don't have a fast model configured for this
feature, so it fires a wasted API request on every turn with no
visible benefit. Default to off; users can opt in via settings.

packages/cli/src/config/settingsSchema.ts

@@ -518,7 +518,7 @@ const SETTINGS_SCHEMA = {
         label: 'Enable Follow-up Suggestions',
         category: 'UI',
         requiresRestart: false,
-        default: true,
+        default: false,
         description:
           'Show context-aware follow-up suggestions after task completion. Press Tab or Right Arrow to accept, Enter to accept and submit.',
         showInDialog: true,

packages/cli/src/ui/AppContainer.tsx

@@ -1113,7 +1113,7 @@ export const AppContainer = (props: AppContainerProps) => {
 
   // Generate prompt suggestions when streaming completes
   const followupSuggestionsEnabled =
-    settings.merged.ui?.enableFollowupSuggestions !== false;
+    settings.merged.ui?.enableFollowupSuggestions === true;
 
   useEffect(() => {
     // Clear suggestion when feature is disabled at runtime

packages/vscode-ide-companion/schemas/settings.schema.json

@@ -183,7 +183,7 @@
         "enableFollowupSuggestions": {
           "description": "Show context-aware follow-up suggestions after task completion. Press Tab or Right Arrow to accept, Enter to accept and submit.",
           "type": "boolean",
-          "default": true
+          "default": false
         },
         "enableCacheSharing": {
           "description": "Use cache-aware forked queries for suggestion generation. Reduces cost on providers that support prefix caching (experimental).",