Add unit tests for CLI modules and fix ESLint issues

- Add comprehensive unit tests for all CLI-related modules:
  - CliContextManager
  - CliVersionManager
  - cliDetector
  - CliInstaller
- Fix ESLint issues by replacing @ts-ignore with @ts-expect-error
- Fix any type issues in test files
- Add tests for diff-manager functionality
- Improve loading messages random selection stability

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/vscode-ide-companion/src/acp/acpMessageHandler.ts

@@ -17,7 +17,7 @@ import type {
   AcpResponse,
   AcpSessionUpdate,
   AcpPermissionRequest,
-} from '../shared/acpTypes.js';
+} from '../constants/acpTypes.js';
 import { CLIENT_METHODS } from './schema.js';
 import type {
   PendingRequest,