• Johnny's avatar
    feat: add HDR image and video support · 5612fb8f
    Johnny authored
    - Add HDR detection utilities for wide color gamut formats (HEIC, HEIF, WebP)
    - Apply colorSpace attribute to image/video elements for HDR-capable files
    - Update frontend components (AttachmentCard, PreviewImageDialog, AttachmentList)
    - Expand backend thumbnail generation to support HEIC, HEIF, WebP formats
    - Add Color-Gamut response headers to advertise wide gamut support
    - Extend avatar MIME type validation for HDR formats
    
    Supported formats:
    - Images: HEIC, HEIF, WebP, PNG, JPEG
    - Videos: MP4, QuickTime, Matroska, WebM (VP9 Profile 2)
    
    Browser support:
    - Safari 14.1+, Chrome 118+, Edge 118+
    - Gracefully degrades to sRGB on unsupported browsers
    5612fb8f
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