feat: upload wizard refactor + vision AI tags + artwork versioning

Upload wizard:
- Refactored UploadWizard into modular steps (Step1FileUpload, Step2Details, Step3Publish)
- Extracted reusable hooks: useUploadMachine, useFileValidation, useVisionTags
- Extracted reusable components: CategorySelector, ContentTypeSelector
- Added TagPicker component (studio-style list picker with AI badge + new-tag insertion)
- Fixed TagInput auto-open bug (hasFocusedRef guard)
- Replaced TagInput with TagPicker in UploadSidebar

Vision AI tag suggestions:
- Add UploadVisionSuggestController: sync POST /api/uploads/{id}/vision-suggest
- Calls vision.klevze.net/analyze/all on upload completion (before step 2 opens)
- Two-phase useVisionTags: immediate gateway call + background DB polling
- Trigger fires on uploadReady (not step change) so tags arrive before user sees step 2
- Added vision.gateway config block with VISION_GATEWAY_URL env

Artwork versioning system:
- ArtworkVersion / ArtworkVersionEvent models
- ArtworkVersioningService: createNewVersion, restoreVersion, rate limiting, ranking decay
- Migrations: artwork_versions, artwork_version_events, versioning columns on artworks
- Studio API routes: GET versions, POST restore/{version_id}
- Feature tests: ArtworkVersioningTest (13 cases)

resources/js/components/upload/UploadProgress.jsx

@@ -60,7 +60,7 @@ export default function UploadProgress({
   const progressValue = Math.max(0, Math.min(100, Number(progress) || 0))
 
   return (
-    <header className="rounded-xl border border-white/50 bg-gradient-to-br from-slate-900/80 to-slate-900/50 p-5 shadow-[0_12px_40px_rgba(0,0,0,0.35)] sm:p-6">
+    <header className="rounded-xl ring-1 ring-white/10 bg-gradient-to-br from-slate-900/80 to-slate-900/50 p-5 shadow-[0_12px_40px_rgba(0,0,0,0.35)] sm:p-6">
       {/* Intended props: step, steps, phase, badge, progress, statusMessage */}
       <div className="flex flex-wrap items-center justify-between gap-3">
         <div>