Replace websocket flow with SSE support in backend.

Update handlers, services, router, and data conversion logic to support server-sent events and related message pipeline changes.

Made-with: Cursor

internal/dto/converter.go

@@ -284,6 +284,7 @@ func ConvertPostToResponse(post *model.Post, isLiked, isFavorited bool) *PostRes
 		Title:          post.Title,
 		Content:        post.Content,
 		Images:         images,
+		Status:         string(post.Status),
 		LikesCount:     post.LikesCount,
 		CommentsCount:  post.CommentsCount,
 		FavoritesCount: post.FavoritesCount,
@@ -293,6 +294,7 @@ func ConvertPostToResponse(post *model.Post, isLiked, isFavorited bool) *PostRes
 		IsLocked:       post.IsLocked,
 		IsVote:         post.IsVote,
 		CreatedAt:      FormatTime(post.CreatedAt),
+		UpdatedAt:      FormatTime(post.UpdatedAt),
 		Author:         author,
 		IsLiked:        isLiked,
 		IsFavorited:    isFavorited,

internal/dto/dto.go

@@ -68,6 +68,7 @@ type PostResponse struct {
 	Title          string              `json:"title"`
 	Content        string              `json:"content"`
 	Images         []PostImageResponse `json:"images"`
+	Status         string              `json:"status,omitempty"`
 	LikesCount     int                 `json:"likes_count"`
 	CommentsCount  int                 `json:"comments_count"`
 	FavoritesCount int                 `json:"favorites_count"`
@@ -77,6 +78,7 @@ type PostResponse struct {
 	IsLocked       bool                `json:"is_locked"`
 	IsVote         bool                `json:"is_vote"`
 	CreatedAt      string              `json:"created_at"`
+	UpdatedAt      string              `json:"updated_at"`
 	Author         *UserResponse       `json:"author"`
 	IsLiked        bool                `json:"is_liked"`
 	IsFavorited    bool                `json:"is_favorited"`