fix(test): strip ANSI codes from Ink TUI test assertions (#1301)

Three TUI component tests were broken on main because Ink 6.8.0
emits ANSI escape codes from `<Text dimColor>`, `<Text color=...>`,
and `<GradientText>` even when the renderer is not attached to a TTY.
The affected assertions compare `lastFrame()` against plain strings,
so the ANSI bytes inside the frame caused these to fail:

  src/cli/tui/components/__tests__/DeployStatus.test.tsx:
    - 'shows "Deploying to AWS" when not complete'
    - 'ignores non-resource-event messages (non-I5502 codes)'
      (frame contains `\u001b[90m╭…` from <GradientText> + bordered <Box>)

  src/cli/tui/components/__tests__/LogPanel.test.tsx:
    - 'renders "No output yet" with no other content'
      (frame is `\u001b[2mNo output yet\u001b[22m` from <Text dimColor>)

  src/cli/tui/components/__tests__/SecretInput.test.tsx:
    - 'renders placeholder when value is empty'
      (placeholder is split into <Cursor> + <Text dimColor>, so the
       literal substring 'sk-...' has ANSI codes between 's' and 'k-...')

Fix: import `strip-ansi` (already a transitive dep, now declared as a
devDependency) and apply it to `lastFrame()` in the four affected
assertions. Other assertions in the same files were left untouched
because they pass through plain log lines / system messages that are
already ANSI-free.

Verified locally:
  Before: Test Files 3 failed | 270 passed (273) | Tests 4 failed | 3912 passed (3916)
  After:  Test Files 273 passed (273)            | Tests 3916 passed (3916)

Co-authored-by: Andrés Aguilar <andiaa@amazon.com>

Author: arepageek

package-lock.json

@@ -143,6 +143,7 @@
     "node-pty": "^1.1.0",
     "prettier": "^3.7.4",
     "secretlint": "^12.2.0",
+    "strip-ansi": "^7.2.0",
     "tsx": "^4.21.0",
     "typescript": "^5",
     "typescript-eslint": "^8.50.1",

package.json

@@ -2,6 +2,7 @@ import type { DeployMessage } from '../../../cdk/toolkit-lib/index.js';
 import { DeployStatus } from '../DeployStatus.js';
 import { render } from 'ink-testing-library';
 import React from 'react';
+import stripAnsi from 'strip-ansi';
 import { describe, expect, it } from 'vitest';
 
 function makeMsg(
@@ -28,7 +29,7 @@ describe('DeployStatus', () => {
     it('shows "Deploying to AWS" when not complete', () => {
       const { lastFrame } = render(<DeployStatus messages={[]} isComplete={false} hasError={false} />);
 
-      expect(lastFrame()).toContain('Deploying to AWS');
+      expect(stripAnsi(lastFrame()!)).toContain('Deploying to AWS');
     });
 
     it('shows success message when complete without error', () => {
@@ -90,7 +91,7 @@ describe('DeployStatus', () => {
       const { lastFrame } = render(<DeployStatus messages={messages} isComplete={false} hasError={false} />);
 
       // Should show deploying text but no resource lines
-      expect(lastFrame()).toContain('Deploying to AWS');
+      expect(stripAnsi(lastFrame()!)).toContain('Deploying to AWS');
       expect(lastFrame()).not.toContain('Some general info');
     });
 

src/cli/tui/components/__tests__/DeployStatus.test.tsx

@@ -2,6 +2,7 @@ import type { LogEntry } from '../LogPanel.js';
 import { LogPanel } from '../LogPanel.js';
 import { render } from 'ink-testing-library';
 import React from 'react';
+import stripAnsi from 'strip-ansi';
 import { afterEach, describe, expect, it, vi } from 'vitest';
 
 const UP_ARROW = '\x1B[A';
@@ -19,7 +20,7 @@ describe('LogPanel', () => {
   describe('empty state', () => {
     it('renders "No output yet" with no other content', () => {
       const { lastFrame } = render(<LogPanel logs={[]} />);
-      expect(lastFrame()).toBe('No output yet');
+      expect(stripAnsi(lastFrame()!)).toBe('No output yet');
     });
   });
 

src/cli/tui/components/__tests__/LogPanel.test.tsx

@@ -1,6 +1,7 @@
 import { ApiKeySecretInput, SecretInput } from '../SecretInput.js';
 import { render } from 'ink-testing-library';
 import React from 'react';
+import stripAnsi from 'strip-ansi';
 import { afterEach, describe, expect, it, vi } from 'vitest';
 import { z } from 'zod';
 
@@ -34,7 +35,7 @@ describe('SecretInput', () => {
       <SecretInput prompt="Key" placeholder="sk-..." onSubmit={vi.fn()} onCancel={vi.fn()} />
     );
 
-    expect(lastFrame()).toContain('sk-...');
+    expect(stripAnsi(lastFrame()!)).toContain('sk-...');
   });
 
   it('masks input with default * character', async () => {