增加公告图片编辑, 增加取消归档

backend/internal/modules/announcement/handler.go

@@ -173,6 +173,22 @@ func (h *Handler) Archive(c *gin.Context) {
 	response.OK(c, gin.H{"message": "归档成功"})
 }
 
+// Unarchive 取消归档公告
+func (h *Handler) Unarchive(c *gin.Context) {
+	id, err := parseID(c)
+	if err != nil {
+		response.BadRequest(c, "公告ID不正确")
+		return
+	}
+
+	if err := h.service.Unarchive(c.Request.Context(), id); err != nil {
+		response.InternalServerError(c, "取消归档公告失败")
+		return
+	}
+
+	response.OK(c, gin.H{"message": "取消归档成功"})
+}
+
 // Delete 删除公告
 func (h *Handler) Delete(c *gin.Context) {
 	id, err := parseID(c)

backend/internal/modules/announcement/repository.go

@@ -179,6 +179,17 @@ func (r *Repository) Archive(ctx context.Context, id uint64) error {
 		Update("status", "archived").Error
 }
 
+// Unarchive 取消归档公告，恢复为已发布状态
+func (r *Repository) Unarchive(ctx context.Context, id uint64) error {
+	now := time.Now()
+	return r.db.WithContext(ctx).Model(&model.Announcement{}).
+		Where("id = ?", id).
+		Updates(map[string]interface{}{
+			"status":       "published",
+			"published_at": gorm.Expr("COALESCE(published_at, ?)", now),
+		}).Error
+}
+
 // Delete 删除公告
 func (r *Repository) Delete(ctx context.Context, id uint64) error {
 	return r.db.WithContext(ctx).Where("id = ?", id).Delete(&model.Announcement{}).Error

backend/internal/modules/announcement/service.go

@@ -95,6 +95,11 @@ func (s *Service) Archive(ctx context.Context, id uint64) error {
 	return s.repo.Archive(ctx, id)
 }
 
+// Unarchive 取消归档公告
+func (s *Service) Unarchive(ctx context.Context, id uint64) error {
+	return s.repo.Unarchive(ctx, id)
+}
+
 // Delete 删除公告
 func (s *Service) Delete(ctx context.Context, id uint64) error {
 	return s.repo.Delete(ctx, id)