fix(plan): prevent plan truncation in approval dialog by supporting unconstrained heights (#21037)

Co-authored-by: jacob314 <jacob314@gmail.com>

packages/cli/src/ui/AppContainer.tsx

@@ -1389,11 +1389,7 @@ Logging in with Google... Restarting Gemini CLI to continue.
   // Compute available terminal height based on controls measurement
   const availableTerminalHeight = Math.max(
     0,
-    terminalHeight -
-      controlsHeight -
-      staticExtraHeight -
-      2 -
-      backgroundShellHeight,
+    terminalHeight - controlsHeight - backgroundShellHeight - 1,
   );
 
   config.setShellExecutionConfig({

packages/cli/src/ui/components/AskUserDialog.tsx

@@ -807,16 +807,21 @@ const ChoiceQuestionView: React.FC<ChoiceQuestionViewProps> = ({
   const TITLE_MARGIN = 1;
   const FOOTER_HEIGHT = 2; // DialogFooter + margin
   const overhead = HEADER_HEIGHT + TITLE_MARGIN + FOOTER_HEIGHT;
+
   const listHeight = availableHeight
     ? Math.max(1, availableHeight - overhead)
     : undefined;
-  const questionHeight =
+
+  const questionHeightLimit =
     listHeight && !isAlternateBuffer
-      ? Math.min(15, Math.max(1, listHeight - DIALOG_PADDING))
+      ? question.unconstrainedHeight
+        ? Math.max(1, listHeight - selectionItems.length * 2)
+        : Math.min(15, Math.max(1, listHeight - DIALOG_PADDING))
       : undefined;
+
   const maxItemsToShow =
-    listHeight && questionHeight
-      ? Math.max(1, Math.floor((listHeight - questionHeight) / 2))
+    listHeight && questionHeightLimit
+      ? Math.max(1, Math.floor((listHeight - questionHeightLimit) / 2))
       : selectionItems.length;
 
   return (
@@ -824,7 +829,7 @@ const ChoiceQuestionView: React.FC<ChoiceQuestionViewProps> = ({
       {progressHeader}
       <Box marginBottom={TITLE_MARGIN}>
         <MaxSizedBox
-          maxHeight={questionHeight}
+          maxHeight={questionHeightLimit}
           maxWidth={availableWidth}
           overflowDirection="bottom"
         >

packages/cli/src/ui/components/ExitPlanModeDialog.tsx

@@ -249,6 +249,7 @@ export const ExitPlanModeDialog: React.FC<ExitPlanModeDialogProps> = ({
             ],
             placeholder: 'Type your feedback...',
             multiSelect: false,
+            unconstrainedHeight: false,
           },
         ]}
         onSubmit={(answers) => {

packages/cli/src/ui/components/ToolConfirmationQueue.test.tsx

@@ -282,7 +282,10 @@ describe('ToolConfirmationQueue', () => {
     // hideToolIdentity is true for ask_user -> subtracts 4 instead of 6
     // availableContentHeight = 19 - 4 = 15
     // ToolConfirmationMessage handlesOwnUI=true -> returns full 15
-    // AskUserDialog uses 15 lines to render its multi-line question and options.
+    // AskUserDialog allocates questionHeight = availableHeight - overhead - DIALOG_PADDING.
+    // listHeight = 15 - overhead (Header:0, Margin:1, Footer:2) = 12.
+    // maxQuestionHeight = listHeight - 4 = 8.
+    // 8 lines is enough for the 6-line question.
     await waitFor(() => {
       expect(lastFrame()).toContain('Line 6');
       expect(lastFrame()).not.toContain('lines hidden');

packages/core/src/confirmation-bus/types.ts

@@ -167,6 +167,8 @@ export interface Question {
   multiSelect?: boolean;
   /** Placeholder hint text. For type='text', shown in the input field. For type='choice', shown in the "Other" custom input. */
   placeholder?: string;
+  /** Allow the question to consume more vertical space instead of being strictly capped. */
+  unconstrainedHeight?: boolean;
 }
 
 export interface AskUserRequest {