Add followingCount to GetVideoFeed payload

Surfaces how many leading feed videos come from followed users so the
client can place the 'Trending' section divider in the blended home feed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/index.tsx

@@ -3679,6 +3679,7 @@ export type VideoGql = {
 
 export type VideoHistoryGql = {
   __typename?: "VideoHistoryGQL";
+  followingCount: Scalars["Int"]["output"];
   hasFollowing: Scalars["Boolean"]["output"];
   pageInfo: PageInfoGql;
   videos: Array<VideoGql>;
@@ -4508,6 +4509,7 @@ export type GetVideoFeedQuery = {
   getFeedVideos: {
     __typename?: "VideoHistoryGQL";
     hasFollowing: boolean;
+    followingCount: number;
     videos: Array<{
       __typename?: "VideoGQL";
       id: number;
@@ -9478,6 +9480,7 @@ export const GetVideoFeedDocument = gql`
         endCursor
       }
       hasFollowing
+      followingCount
     }
   }
   ${VideoCardFieldsFragmentDoc}

src/operations/feed.gql

@@ -146,5 +146,6 @@ query GetVideoFeed(
       endCursor
     }
     hasFollowing
+    followingCount
   }
 }

src/schema.gql

@@ -732,6 +732,7 @@ type VideoHistoryGQL {
   videos: [VideoGQL!]!
   pageInfo: PageInfoGQL!
   hasFollowing: Boolean!
+  followingCount: Int!
 }
 
 type PageInfoGQL {