v3: type checking and lint pass clean — thumbnail placeholder takes file-dump props, no manual memo the compiler can't keep, no setState straight in effect bodies

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/pages/DumpEdit.tsx

@@ -304,7 +304,8 @@ function DumpEditForm({
   const toggleCategory = (id: string) =>
     setSelectedCategoryIds((prev) => {
       const next = new Set(prev);
-      next.has(id) ? next.delete(id) : next.add(id);
+      if (next.has(id)) next.delete(id);
+      else next.add(id);
       return next;
     });
   const form = useApiForm<EditValues>({

src/pages/index/FollowedFeed.tsx

@@ -241,7 +241,7 @@ export function FollowedFeed({
           })
         );
     }
-  }, [token, usersState.status, playlistsState.status]);
+  }, [token, usersState.status, playlistsState.status, catQuery]);
 
   // Scroll save
   useScrollSave(
@@ -298,7 +298,7 @@ export function FollowedFeed({
           s.status === "loaded" ? { ...s, loadingMore: false } : s
         )
       );
-  }, [usersState, token]);
+  }, [usersState, token, catQuery]);
 
   const loadMorePlaylists = useCallback(() => {
     if (
@@ -333,7 +333,7 @@ export function FollowedFeed({
           s.status === "loaded" ? { ...s, loadingMore: false } : s
         )
       );
-  }, [playlistsState, token]);
+  }, [playlistsState, token, catQuery]);
 
   return (
     <div className="followed-feed">