feat: prompt users to run /terminal-setup with yes/no (#16235)

Co-authored-by: Vedant Mahajan <Vedant.04.mahajan@gmail.com>

packages/cli/src/ui/utils/terminalSetup.test.ts

@@ -5,7 +5,12 @@
  */
 
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
-import { terminalSetup, VSCODE_SHIFT_ENTER_SEQUENCE } from './terminalSetup.js';
+import {
+  terminalSetup,
+  VSCODE_SHIFT_ENTER_SEQUENCE,
+  shouldPromptForTerminalSetup,
+} from './terminalSetup.js';
+import { terminalCapabilityManager } from './terminalCapabilityManager.js';
 
 // Mock dependencies
 const mocks = vi.hoisted(() => ({
@@ -195,4 +200,51 @@ describe('terminalSetup', () => {
       expect(mocks.writeFile).toHaveBeenCalled();
     });
   });
+
+  describe('shouldPromptForTerminalSetup', () => {
+    it('should return false when kitty protocol is already enabled', async () => {
+      vi.mocked(
+        terminalCapabilityManager.isKittyProtocolEnabled,
+      ).mockReturnValue(true);
+
+      const result = await shouldPromptForTerminalSetup();
+      expect(result).toBe(false);
+    });
+
+    it('should return false when both Shift+Enter and Ctrl+Enter bindings already exist', async () => {
+      vi.mocked(
+        terminalCapabilityManager.isKittyProtocolEnabled,
+      ).mockReturnValue(false);
+      process.env['TERM_PROGRAM'] = 'vscode';
+
+      const existingBindings = [
+        {
+          key: 'shift+enter',
+          command: 'workbench.action.terminal.sendSequence',
+          args: { text: VSCODE_SHIFT_ENTER_SEQUENCE },
+        },
+        {
+          key: 'ctrl+enter',
+          command: 'workbench.action.terminal.sendSequence',
+          args: { text: VSCODE_SHIFT_ENTER_SEQUENCE },
+        },
+      ];
+      mocks.readFile.mockResolvedValue(JSON.stringify(existingBindings));
+
+      const result = await shouldPromptForTerminalSetup();
+      expect(result).toBe(false);
+    });
+
+    it('should return true when keybindings file does not exist', async () => {
+      vi.mocked(
+        terminalCapabilityManager.isKittyProtocolEnabled,
+      ).mockReturnValue(false);
+      process.env['TERM_PROGRAM'] = 'vscode';
+
+      mocks.readFile.mockRejectedValue(new Error('ENOENT'));
+
+      const result = await shouldPromptForTerminalSetup();
+      expect(result).toBe(true);
+    });
+  });
 });