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>

app/api/assets/route.ts

@@ -17,7 +17,11 @@ export async function GET(request: Request) {
 
   const where: Record<string, unknown> = {};
   if (campaignId) where.campaignId = campaignId;
-  if (type && type !== "all") where.type = type;
+  if (type === "media") {
+    where.type = { in: ["image", "video"] };
+  } else if (type && type !== "all") {
+    where.type = type;
+  }
   if (platform && platform !== "all") where.platform = platform;
   if (status && status !== "all") where.status = status;
   if (search) {