fix feed empty list rendering

backend/internal/video/comment_handler.go

@@ -90,5 +90,8 @@ func (h *CommentHandler) GetAllComments(c *gin.Context) {
 		c.JSON(400, gin.H{"error": err.Error()})
 		return
 	}
+	if comments == nil {
+		comments = []Comment{}
+	}
 	c.JSON(200, comments)
 }

backend/internal/video/like_handler.go

@@ -106,5 +106,8 @@ func (lh *LikeHandler) ListMyLikedVideos(c *gin.Context) {
 		c.JSON(500, gin.H{"error": err.Error()})
 		return
 	}
+	if videos == nil {
+		videos = []Video{}
+	}
 	c.JSON(200, videos)
 }

backend/internal/video/video_handler.go

@@ -207,6 +207,9 @@ func (vh *VideoHandler) ListByAuthorID(c *gin.Context) {
 		c.JSON(400, gin.H{"error": err.Error()})
 		return
 	}
+	if videos == nil {
+		videos = []Video{}
+	}
 	c.JSON(200, videos)
 }