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Problem: Premiere offers JPEG, Targa and DPX as image-sequence export formats; FilmCraft only wrote PNG, TIFF and BMP sequences (docs/gaps.md G13). Fix: three new export formats (ids jpg, tga, dpx), numbered like the other sequences, with presets, the export UI (JPEG quality slider, Targa alpha) and es/ja/zh-cn strings. JPEG uses the image crate at the export quality; Targa (TGA 2.0, uncompressed 24/32-bit) and DPX (SMPTE ST 268, 10-bit RGB method A, BT.709) are written by a small hostile-input-safe writer in crates/export/src/raster.rs. Format::is_image_sequence replaces the hand-kept format lists. OpenEXR stays open. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>