feat: 对接稿件审核通知系统 + 消息页面系统消息区域

- 新增通知类型 post_approved / post_rejected
- PostService.Approve/Reject 完成后通知作者（通知失败不影响主流程）
- NotificationService 新增 NotifyPostApproved/NotifyPostRejected 方法
- 消息页面顶部增加系统消息标识和分隔线，之下为全部消息列表
- 稿件审核通过通知卡片点击跳转到 /posts/{id} 页面
- 稿件审核拒绝通知卡片点击跳转到 /studio/posts 创作中心
- 新增 postNotifier 接口遵循 ISP 原则

internal/model/notification.go

@@ -2,8 +2,10 @@ package model
 
 // 消息/通知类型常量
 const (
-	NotifyAuditApproved  = "audit_approved"
-	NotifyAuditRejected  = "audit_rejected"
+	NotifyAuditApproved = "audit_approved"
+	NotifyAuditRejected = "audit_rejected"
+	NotifyPostApproved  = "post_approved"
+	NotifyPostRejected  = "post_rejected"
 )
 
 // Notification 消息/通知模型
@@ -20,8 +22,10 @@ type Notification struct {
 
 // NotifyTypeNames 通知类型 → 中文名
 var NotifyTypeNames = map[string]string{
-	NotifyAuditApproved: "系统通知",
-	NotifyAuditRejected: "系统通知",
+	NotifyAuditApproved: "资料审核",
+	NotifyAuditRejected: "资料审核",
+	NotifyPostApproved:  "稿件审核",
+	NotifyPostRejected:  "稿件审核",
 }
 
 // NotificationListResult 消息列表查询结果

internal/router/deps_extra.go

@@ -32,7 +32,7 @@ func buildDeps(db *gorm.DB, cfg *config.Config, siteSettings *config.SiteSetting
 	)
 
 	postRepo := repository.NewPostRepo(db)
-	postService := service.NewPostService(postRepo, siteSettings)
+	postService := service.NewPostService(postRepo, siteSettings, notificationService)
 	shortcodeSvc := service.NewShortcodeService()
 	postCtrl := controller.NewPostController(postService, shortcodeSvc)
 	adminPostCtrl := adminCtrl.NewAdminPostController(postService)

internal/service/notification_service.go

@@ -110,3 +110,20 @@ func (s *NotificationService) NotifyAuditRejected(userID uint, auditType, reason
 		content,
 		&relatedID)
 }
+
+// NotifyPostApproved 稿件审核通过通知
+func (s *NotificationService) NotifyPostApproved(userID uint, postTitle string, postID uint) {
+	title := "稿件审核通过"
+	content := "你的稿件《" + postTitle + "》已通过审核，现已公开发布"
+	_ = s.Create(userID, model.NotifyPostApproved, title, content, &postID)
+}
+
+// NotifyPostRejected 稿件审核拒绝通知
+func (s *NotificationService) NotifyPostRejected(userID uint, postTitle, reason string, postID uint) {
+	title := "稿件审核未通过"
+	content := "你的稿件《" + postTitle + "》未通过审核"
+	if reason != "" {
+		content += "，理由：" + reason
+	}
+	_ = s.Create(userID, model.NotifyPostRejected, title, content, &postID)
+}

internal/service/post_service.go

@@ -75,15 +75,17 @@ func generateExcerpt(md string) string {
 
 // PostService 帖子业务逻辑
 type PostService struct {
-	repo postStore
-	ss   *config.SiteSettings
+	repo     postStore
+	ss       *config.SiteSettings
+	notifier postNotifier
 }
 
 // NewPostService 构造函数
-func NewPostService(repo postStore, ss *config.SiteSettings) *PostService {
+func NewPostService(repo postStore, ss *config.SiteSettings, notifier postNotifier) *PostService {
 	return &PostService{
-		repo: repo,
-		ss:   ss,
+		repo:     repo,
+		ss:       ss,
+		notifier: notifier,
 	}
 }
 
@@ -263,8 +265,10 @@ func (s *PostService) Approve(postID uint) error {
 		return err
 	}
 
+	wasRevision := post.PendingBody != ""
+
 	// 修订审核：将待审内容覆盖到正式字段
-	if post.PendingBody != "" {
+	if wasRevision {
 		post.Title = post.PendingTitle
 		post.Body = post.PendingBody
 		post.Excerpt = generateExcerpt(post.PendingBody)
@@ -272,7 +276,14 @@ func (s *PostService) Approve(postID uint) error {
 		post.PendingBody = ""
 		post.Status = model.PostStatusApproved
 		post.RejectReason = ""
-		return s.repo.Update(post)
+		if err := s.repo.Update(post); err != nil {
+			return err
+		}
+		// 通知作者修订审核通过
+		if s.notifier != nil {
+			s.notifier.NotifyPostApproved(post.UserID, post.Title, post.ID)
+		}
+		return nil
 	}
 
 	// 首次审核通过
@@ -281,7 +292,14 @@ func (s *PostService) Approve(postID uint) error {
 	}
 	post.Status = model.PostStatusApproved
 	post.RejectReason = ""
-	return s.repo.Update(post)
+	if err := s.repo.Update(post); err != nil {
+		return err
+	}
+	// 通知作者审核通过
+	if s.notifier != nil {
+		s.notifier.NotifyPostApproved(post.UserID, post.Title, post.ID)
+	}
+	return nil
 }
 
 // Reject 退回：pending/approved → rejected；修订退回则清空 Pending 保持 approved
@@ -299,13 +317,27 @@ func (s *PostService) Reject(postID uint, reason string) error {
 		post.PendingTitle = ""
 		post.PendingBody = ""
 		post.RejectReason = reason
-		return s.repo.Update(post)
+		if err := s.repo.Update(post); err != nil {
+			return err
+		}
+		// 通知作者修订被退回
+		if s.notifier != nil {
+			s.notifier.NotifyPostRejected(post.UserID, post.Title, reason, post.ID)
+		}
+		return nil
 	}
 
 	// 普通退回（首次审核）
 	post.Status = model.PostStatusRejected
 	post.RejectReason = reason
-	return s.repo.Update(post)
+	if err := s.repo.Update(post); err != nil {
+		return err
+	}
+	// 通知作者审核被退回
+	if s.notifier != nil {
+		s.notifier.NotifyPostRejected(post.UserID, post.Title, reason, post.ID)
+	}
+	return nil
 }
 
 // Lock 锁定：设置 IsLocked 标志，禁止编辑，不改变帖子发布状态

internal/service/repository.go

@@ -53,4 +53,10 @@ type spaceUserStore interface {
 // spacePostStore SpaceService 所需的最小帖子仓储接口（ISP：1 个方法）
 type spacePostStore interface {
 	FindByUserID(userID uint, offset, limit int) ([]model.Post, int64, error)
+}
+
+// postNotifier PostService 所需的通知服务接口（ISP：2 个方法）
+type postNotifier interface {
+	NotifyPostApproved(userID uint, postTitle string, postID uint)
+	NotifyPostRejected(userID uint, postTitle, reason string, postID uint)
 }

templates/MetaLab-2026/html/messages/index.html

@@ -21,6 +21,15 @@
     </aside>
 
     <div class="msg-main">
+        <!-- 系统消息区域 -->
+        <div class="msg-system-section">
+            <div class="msg-system-header">
+                <svg class="msg-system-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="18" height="18"><circle cx="12" cy="12" r="10"/><line x1="12" y1="8" x2="12" y2="12"/><line x1="12" y1="16" x2="12.01" y2="16"/></svg>
+                系统消息
+            </div>
+            <div class="msg-system-divider"></div>
+        </div>
+
         {{if .Messages}}
         <div class="msg-toolbar">
             {{if .UnreadCount}}
@@ -29,7 +38,18 @@
         </div>
         <div class="msg-list">
             {{range $i, $m := .Messages}}
-            <div class="msg-card{{if not $m.IsRead}} unread{{end}}" data-id="{{$m.ID}}">
+            {{$link := ""}}
+            {{if or (eq $m.NotifyType "post_approved") (eq $m.NotifyType "post_rejected")}}
+                {{if eq $m.NotifyType "post_approved"}}
+                    {{$link = printf "/posts/%d" $m.RelatedID}}
+                {{else}}
+                    {{$link = "/studio/posts"}}
+                {{end}}
+            {{end}}
+            {{if $link}}
+            <a href="{{$link}}" class="msg-card-link">
+            {{end}}
+            <div class="msg-card{{if not $m.IsRead}} unread{{end}}" data-id="{{$m.ID}}" data-type="{{$m.NotifyType}}" data-link="{{$link}}">
                 <div class="msg-icon">
                     <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="20" height="20"><path d="M18 8A6 6 0 0 0 6 8c0 7-3 9-3 9h18s-3-2-3-9"/><path d="M13.73 21a2 2 0 0 1-3.46 0"/></svg>
                 </div>
@@ -45,6 +65,9 @@
                 <span class="msg-badge"></span>
                 {{end}}
             </div>
+            {{if $link}}
+            </a>
+            {{end}}
             {{end}}
         </div>
 
@@ -82,7 +105,10 @@
     var cards = document.querySelectorAll('.msg-card.unread');
     for (var i = 0; i < cards.length; i++) {
         (function (card) {
-            card.addEventListener('click', function () {
+            card.addEventListener('click', function (e) {
+                var link = card.getAttribute('data-link');
+                // 如果是可跳转的通知（post 审核），不阻止默认行为，只标记已读
+                // 标记已读通过 fetch 发送，不阻止链接跳转
                 var id = card.getAttribute('data-id');
                 if (!id) return;
                 var xhr = new XMLHttpRequest();
@@ -96,6 +122,15 @@
                     }
                 };
                 xhr.send();
+
+                // 如果有链接，在标记已读后跳转（非 post 通知直接标记已读）
+                if (link) {
+                    e.preventDefault();
+                    var self = this;
+                    setTimeout(function () {
+                        window.location.href = link;
+                    }, 200);
+                }
             });
         })(cards[i]);
     }

templates/MetaLab-2026/static/css/messages.css

@@ -100,6 +100,43 @@ body {
     min-width: 0;
 }
 
+/* ---------- System Message Section ---------- */
+.msg-system-section {
+    margin-bottom: 1.25rem;
+}
+
+.msg-system-header {
+    display: flex;
+    align-items: center;
+    gap: .5rem;
+    font-size: .95rem;
+    font-weight: 600;
+    color: var(--color-primary);
+    padding: 0 0 .5rem 0;
+}
+
+.msg-system-icon {
+    color: var(--color-accent);
+    flex-shrink: 0;
+}
+
+.msg-system-divider {
+    height: 1px;
+    background: linear-gradient(to right, var(--color-border), transparent);
+    margin: 0;
+}
+
+/* ---------- Message Card Link ---------- */
+.msg-card-link {
+    text-decoration: none;
+    color: inherit;
+    display: block;
+}
+
+.msg-card-link:hover {
+    text-decoration: none;
+}
+
 /* ---------- Toolbar ---------- */
 .msg-toolbar {
     display: flex;