fix(swarm,timeline): Remove node-level NSFW cascade from post filtering

- Update NSFW flag logic to only consider post and author NSFW status
- Remove nodeIsNsfw from post-level isNsfw calculation
- Ensure node-level NSFW filtering is applied separately at node selection
- Prevents double-filtering and maintains consistent NSFW handling across timeline

src/app/api/swarm/timeline/route.ts

@@ -107,7 +107,7 @@ export async function GET(request: NextRequest) {
         },
         nodeDomain,
         nodeIsNsfw,
-        isNsfw: post.isNsfw || post.authorIsNsfw || nodeIsNsfw, // Cascade NSFW flag
+        isNsfw: post.isNsfw || post.authorIsNsfw, // Post-level NSFW (not node-level)
         likeCount: post.likesCount,
         repostCount: post.repostsCount,
         replyCount: post.repliesCount,