HDR to SDR v3.2.2

GPU acceleration is now automatic

Removed the manual GPU acceleration toggle. The app detects GPU support once at launch and uses it automatically.
Fixed GPU name detection reporting the wrong device in some cases (e.g. a VR headset's virtual display adapter instead of the actual GPU).
Fixed a GPU fallback during one conversion incorrectly disabling GPU acceleration for the rest of the session instead of just that item.
The Dolby Vision profile 5 notice no longer references the removed GPU checkbox.

The batch summary dialog now shows a specific reason for each failed or cancelled item instead of a generic error.

Preview panes now match the real aspect ratio of your source video instead of assuming 16:9.
Fixed the preview block losing room at small window sizes.

Fixed activation getting stuck in a re-prompt loop on machines without a stable network adapter address, even after a successful activation. If you hit this before, one more online activation should permanently resolve it for offline use.

Full Changelog: v3.2.1...v3.2.2