feat: add asset preferences, video research, and Remotion ad assets

- Add thumbs-down feedback modal and preference API endpoint
- Add AI UGC video platforms research doc
- Add ReflectAd Remotion composition with public flow assets
- Add gemini-ad-designer and poster-ad-designer pipeline skills
- Add research_reflect_v1.1 pipeline script

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

components/repurpose-modal.tsx

@@ -28,7 +28,7 @@ export function RepurposeModal({ assetId, onClose }: RepurposeModalProps) {
   const [available, setAvailable] = useState<string[]>([]);
   const [selected, setSelected] = useState<Set<string>>(new Set());
   const [loading, setLoading] = useState(false);
-  const [result, setResult] = useState<{ created: number } | null>(null);
+  const [result, setResult] = useState<{ formats?: string[] } | null>(null);
 
   useEffect(() => {
     fetch(`/api/assets/${assetId}/repurpose`)
@@ -73,8 +73,10 @@ export function RepurposeModal({ assetId, onClose }: RepurposeModalProps) {
 
         {result ? (
           <div className="py-4 text-center">
-            <p className="text-lg font-semibold">{result.created} asset{result.created !== 1 ? "s" : ""} created</p>
-            <p className="text-sm text-muted-foreground mt-1">Check the Asset Library to review them.</p>
+            <p className="text-lg font-semibold">Repurposing to {result.formats?.length || 0} format{(result.formats?.length || 0) !== 1 ? "s" : ""}</p>
+            <p className="text-sm text-muted-foreground mt-1">
+              Gemini is regenerating the ad at each new size. New assets will appear in the Asset Library when ready.
+            </p>
             <DialogFooter>
               <Button onClick={onClose}>Done</Button>
             </DialogFooter>