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)

routes/api.php

@@ -53,6 +53,9 @@ Route::middleware(['web', 'auth'])->prefix('studio')->name('api.studio.')->group
     Route::post('artworks/{id}/toggle',  [\App\Http\Controllers\Studio\StudioArtworksApiController::class, 'toggle'])->whereNumber('id')->name('artworks.toggle');
     Route::get('artworks/{id}/analytics', [\App\Http\Controllers\Studio\StudioArtworksApiController::class, 'analytics'])->whereNumber('id')->name('artworks.analytics');
     Route::post('artworks/{id}/replace-file', [\App\Http\Controllers\Studio\StudioArtworksApiController::class, 'replaceFile'])->whereNumber('id')->name('artworks.replaceFile');
+    // Versioning
+    Route::get('artworks/{id}/versions',                    [\App\Http\Controllers\Studio\StudioArtworksApiController::class, 'versions'])->whereNumber('id')->name('artworks.versions');
+    Route::post('artworks/{id}/restore/{version_id}',       [\App\Http\Controllers\Studio\StudioArtworksApiController::class, 'restoreVersion'])->whereNumber('id')->whereNumber('version_id')->name('artworks.restoreVersion');
     Route::get('tags/search',            [\App\Http\Controllers\Studio\StudioArtworksApiController::class, 'searchTags'])->name('tags.search');
 });
 
@@ -143,6 +146,11 @@ Route::middleware(['web', 'auth', 'normalize.username'])->prefix('uploads')->nam
     Route::get('status/{id}', [\App\Http\Controllers\Api\UploadController::class, 'status'])
         ->middleware('throttle:uploads-status')
         ->name('status');
+
+    // Synchronous Vision gateway call — returns suggested tags immediately for Step 2 pre-fill
+    Route::post('{id}/vision-suggest', \App\Http\Controllers\Api\UploadVisionSuggestController::class)
+        ->middleware('throttle:60,1')
+        ->name('vision-suggest');
 });
 
 Route::middleware(['web', 'auth', 'admin.moderation'])->prefix('admin/uploads')->name('api.admin.uploads.')->group(function () {