Add video optimization and following-first feed

src/modules/feed/feed.service.ts

@@ -69,6 +69,7 @@ export class FeedService {
   ) {}
 
   async getMyFeed(currentUserId: string, query: FeedQueryDto) {
+    const followingOnly = query.followingOnly ?? true;
     const cacheEnabled =
       this.configService.get<boolean>('feedCache.enabled', { infer: true }) ?? true;
     const globalVersion = cacheEnabled ? await this.feedVersionService.getGlobalVersion() : 0;
@@ -79,7 +80,7 @@ export class FeedService {
       page: query.page ?? 1,
       limit: query.limit ?? 20,
       cursor: query.cursor ?? '',
-      followingOnly: query.followingOnly ?? false,
+      followingOnly,
       radiusKm: query.radiusKm ?? 30,
       preferredPostType: query.preferredPostType ?? '',
       includeSuggestions,
@@ -100,14 +101,23 @@ export class FeedService {
     const limit = query.limit ?? 20;
     const cursorOffset = decodeOffsetCursor(query.cursor);
     const page = query.page ?? 1;
-    const followingOnly = query.followingOnly ?? false;
     const radiusKm = query.radiusKm ?? 30;
     const skip = cursorOffset ?? (page - 1) * limit;
 
     const followingIds = await this.feedRepository.findFollowingIds(currentUserId);
-    const filter = this.buildVisiblePostsFilter(currentUserId, followingIds, followingOnly);
+    let filter = this.buildVisiblePostsFilter(currentUserId, followingIds, followingOnly);
+    let candidates = await this.feedRepository.findCandidatePosts(filter, Math.max(limit * 12, 300));
 
-    const candidates = await this.feedRepository.findCandidatePosts(filter, Math.max(limit * 12, 300));
+    // Keep the default home feed focused on followed accounts, but avoid an empty screen
+    // for new users or when followed accounts have not posted yet.
+    if (
+      candidates.length === 0 &&
+      typeof query.followingOnly === 'undefined' &&
+      followingOnly
+    ) {
+      filter = this.buildVisiblePostsFilter(currentUserId, followingIds, false);
+      candidates = await this.feedRepository.findCandidatePosts(filter, Math.max(limit * 12, 300));
+    }
 
     const scored = candidates
       .filter((post) => {