feat: relief lip, finish presets, and component export

[jal-co]

What

• Relief: vinyl-thickness lip baked from the die-cut distance field - the sticker plateaus over art + border and rolls off with a rounded shoulder at the kiss-cut edge (slider in Artwork; concept credited to konvert.design in the shader source)
• Finish presets: segmented control up top - Holo / Glossy / Matte / Chrome / Glitter - patching finish (metal/rough), intensity, and grain; fixed layered mode leaking holo into non-holo finishes
• Glossy layer material for backing/kiss-cut/artwork layers, visible on the peel reveal
• Component export: shadcn-style single-file holo-sticker.tsx (renderer + types inlined, three as only dep) + holo-sticker-art.png, with a post-download dialog of copyable agent/human integration instructions; generated file typechecks standalone under --strict
• Modal fixes: instructions + changelog scroll correctly inside their cards
• Custom icon set for export menu, share tray, and upload dropzone; new defaults from reviewed settings

Testing

• tsc + build clean; generated component typechecked standalone
• Visual: presets, relief at multiple widths, peel reveal, both dialogs

[vercel]

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Project	Deployment	Actions	Updated (UTC)
holosticker	Ready	Preview	Aug 3, 2026 8:55pm