* window: explain why each GPU was rejected in device selection
"Could not find suitable device" gave no hint of what was missing; the
reasons only went to the log file, which users often cannot find (#489).
Device selection now records each rejection reason and the fatal error
lists every GPU with its reasons, for example:
Could not find suitable device:
AMD BC-250 (RADV GFX1013): fragmentShaderBarycentric is not supported
The missing-extension check also names each missing extension instead of
stopping at the first one without saying which. Device requirements and
selection are unchanged; the log keeps the same messages.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* window: simplify GPU rejection reporting and capability checks
* window: identify storage-image format failures accurately
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: nmzik <Nmzik@mail.ru>
