8dfe7775ea
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SAM2 fix — switched to SAM2ImagePredictor with a generous bbox (5% margin) instead of points. Bbox-based SAM2 captures the full subject including hair, glasses, and sandals since it doesn't clip with negative-point interference
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Non-destructive remove-bg — writes <stem>.nobg.png sidecar, original file untouched; registers sidecar in DB under same group
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New /images/{filename}/duplicate endpoint — copies file with a fresh timestamp name, same group
car.html:
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sam2RemoveBg() — switches viewer to sidecar URL, auto-enables checkerboard; original file never modified
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restoreBg() — purely client-side, reverts viewer to original URL (no API call, no file change)
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Gallery cycling frozen while studio is open (guard in startGroupCycle interval callback)
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Main page scrollbar hidden when studio opens (body.overflow = hidden), restored on close
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Delete — two-step inline confirmation: first click arms the button red ("Confirm delete"), second click deletes; stays in studio and navigates to the next image; only closes if it was the last image in the group
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Duplicate button in Info tab — copies image into same group and navigates to the duplicate immediately
