HDR to SDR v3.2.3

AV1 source fix

• Fixed AV1 source videos failing to convert on CPU, AMD, and Vulkan export paths ("your platform doesn't support hardware accelerated AV1 decoding"). NVENC and QSV exports were unaffected.

More reliable GPU detection

• AMD and Intel GPU acceleration is now verified with a real test encode instead of just checking that the encoder is listed, so a card that can't actually encode no longer gets falsely detected and fails partway through a conversion.

Better GPU failure diagnostics

• GPU failures (detection or mid-conversion fallback to CPU) now log the real error to app.log instead of a generic message.
• The red GPU status label is now clickable and opens app.log directly, so you don't have to go find it yourself.

Full Changelog: v3.2.2...v3.2.3