get_output_dir() now returns <install root>\合并后的图片 (parent of app\) for
frozen builds — next to Launcher.exe, easy to find, not replaced on update.
Falls back to <data_dir>/output if the install root is read-only; dev mode
unchanged. The export panel already uses get_output_dir(), so its default
follows automatically.
- tests/test_file_service.py: +3 (dev, frozen install-root, fallback)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>