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/asset-gallery.tsx

@@ -30,7 +30,7 @@ export function AssetGallery({ campaignId, onPushToPostiz }: AssetGalleryProps)
   const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set());
   const [filters, setFilters] = useState({
     platform: "all",
-    type: "all",
+    type: "media",
   });
   const [search, setSearch] = useState("");
   const [sort, setSort] = useState("newest");
@@ -103,9 +103,10 @@ export function AssetGallery({ campaignId, onPushToPostiz }: AssetGalleryProps)
             setFilters((f) => ({ ...f, type: e.target.value }))
           }
         >
+          <option value="media">Images & Videos</option>
           <option value="all">All Types</option>
-          <option value="image">Images</option>
-          <option value="video">Videos</option>
+          <option value="image">Images Only</option>
+          <option value="video">Videos Only</option>
           <option value="copy">Copy</option>
           <option value="script">Scripts</option>
         </select>
@@ -156,6 +157,7 @@ export function AssetGallery({ campaignId, onPushToPostiz }: AssetGalleryProps)
               selected={selectedIds.has(asset.id)}
               onSelect={toggleSelect}
               onPushToPostiz={onPushToPostiz}
+              onRefresh={fetchAssets}
             />
           ))}
         </div>