feat: bulk video uploads and S3 asset video support (#18)

Add multi-file drag-and-drop queues for project videos and the assets pane, and route asset video uploads through S3/R2 when direct Bunny uploads are disabled.

app/api/videos/[videoId]/assets/bunny-init/route.ts

@@ -10,7 +10,7 @@ import {
   enforceGuestUploadQuota,
   verifyGuestUploadToken,
 } from '@/lib/guest-upload-token';
-import { isBunnyUploadsFeatureEnabled } from '@/lib/feature-flags';
+import { isBunnyUploadsEnabled } from '@/lib/feature-flags';
 import { getShareSessionFromRequest } from '@/lib/share-session';
 import { getVideoAssetAccessContext, SAFE_BUNNY_VIDEO_ID } from '@/lib/video-assets';
 import { logError } from '@/lib/logger';
@@ -33,7 +33,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
     const title = typeof body?.title === 'string' ? body.title.trim() : '';
     if (!title) return apiErrors.badRequest('Title is required');
 
-    if (!isBunnyUploadsFeatureEnabled()) {
+    if (!isBunnyUploadsEnabled()) {
       return apiErrors.badRequest('Direct uploads are disabled by this host');
     }