feat: 管理端板块管理与旧版数据导入，补充部署运营文档

- 新增管理端板块管理页面与后端接口（admin_board）
- 新增旧版数据导入：legacyimport 服务、导入面板、importusers 命令行工具
- 聊天用户卡片、板块图标等 UI 组件与界面优化
- 补充 about/公告/1Panel 部署等文档
- gitignore 排除 dist/ 构建产物与 .agents/ 本地工具目录

backend/service/post.go

@@ -23,6 +23,7 @@ var (
 type PostService struct {
 	db      *gorm.DB
 	setting *SettingService
+	board   *BoardService
 	devMode bool
 }
 
@@ -36,6 +37,12 @@ func (s *PostService) WithSetting(setting *SettingService) *PostService {
 	return s
 }
 
+// WithBoard 注入板块服务（发帖策略校验用）；可链式调用
+func (s *PostService) WithBoard(board *BoardService) *PostService {
+	s.board = board
+	return s
+}
+
 // WithDevMode 开发态：抽奖同 IP 去重对回环地址放宽
 func (s *PostService) WithDevMode(dev bool) *PostService {
 	s.devMode = dev
@@ -744,35 +751,37 @@ func (s *PostService) Create(in CreatePostInput) (*PostDetail, error) {
 		typeMeta, _ = encodeMeta(qm)
 	}
 
-	// 悬赏：创建时托管积分 + 防刷（未结算上限 / 每日上限）
+	// 悬赏：创建时托管积分 + 防刷（未结算上限 / 每日上限）；管理角色豁免防刷
 	var bountyPts int
 	if postType == model.PostTypeBounty {
 		bm, _ := parseBountyMeta(typeMeta)
 		bountyPts = bm.Points
-		var bountyPosts []model.Post
-		s.db.Select("type_meta").
-			Where("user_id = ? AND post_type = ? AND deleted_at IS NULL", in.UserID, model.PostTypeBounty).
-			Find(&bountyPosts)
-		open := 0
-		for _, bp := range bountyPosts {
-			m, err := parseBountyMeta(bp.TypeMeta)
-			if err != nil {
-				continue
+		if !s.isStaffUser(in.UserID) {
+			var bountyPosts []model.Post
+			s.db.Select("type_meta").
+				Where("user_id = ? AND post_type = ? AND deleted_at IS NULL", in.UserID, model.PostTypeBounty).
+				Find(&bountyPosts)
+			open := 0
+			for _, bp := range bountyPosts {
+				m, err := parseBountyMeta(bp.TypeMeta)
+				if err != nil {
+					continue
+				}
+				if m.Escrowed && m.AcceptedCommentID == 0 && !m.Refunded && !m.Expired {
+					open++
+				}
 			}
-			if m.Escrowed && m.AcceptedCommentID == 0 && !m.Refunded && !m.Expired {
-				open++
+			if open >= 3 {
+				return nil, errors.New("未结算悬赏最多同时 3 个，请先采纳或退回")
+			}
+			var todayN int64
+			s.db.Model(&model.Post{}).
+				Where("user_id = ? AND post_type = ? AND created_at >= CURRENT_DATE AND deleted_at IS NULL",
+					in.UserID, model.PostTypeBounty).
+				Count(&todayN)
+			if todayN >= 5 {
+				return nil, errors.New("今日悬赏发帖已达上限（5）")
 			}
-		}
-		if open >= 3 {
-			return nil, errors.New("未结算悬赏最多同时 3 个，请先采纳或退回")
-		}
-		var todayN int64
-		s.db.Model(&model.Post{}).
-			Where("user_id = ? AND post_type = ? AND created_at >= CURRENT_DATE AND deleted_at IS NULL",
-				in.UserID, model.PostTypeBounty).
-			Count(&todayN)
-		if todayN >= 5 {
-			return nil, errors.New("今日悬赏发帖已达上限（5）")
 		}
 		bm.Escrowed = true
 		bm.Refunded = false
@@ -1051,7 +1060,7 @@ func (s *PostService) EnsurePostVisible(postID, viewerID uint, loadActor func()
 	return nil
 }
 
-// checkNewUserCooldown 新用户发帖冷静期（小时数取自站点设置，0=关闭）
+// checkNewUserCooldown 新用户发帖冷静期（小时数取自站点设置，0=关闭）；管理角色豁免
 func (s *PostService) checkNewUserCooldown(userID uint) error {
 	hours := DefaultCooldownHours
 	if s.setting != nil {
@@ -1066,12 +1075,25 @@ func (s *PostService) checkNewUserCooldown(userID uint) error {
 	if err := s.db.First(&user, userID).Error; err != nil {
 		return err
 	}
+	if model.IsStaff(user.Role) { // 管理角色不受发帖冷静期限制
+		return nil
+	}
 	if time.Since(user.CreatedAt) < time.Duration(hours)*time.Hour {
 		return fmt.Errorf("新用户注册 %d 小时后才能发帖", hours)
 	}
 	return nil
 }
 
+// isStaffUser 作者是否管理角色（悬赏防刷等限制豁免用）
+func (s *PostService) isStaffUser(userID uint) bool {
+	var role model.Role
+	if err := s.db.Model(&model.User{}).Where("id = ?", userID).
+		Select("role").Scan(&role).Error; err != nil {
+		return false
+	}
+	return model.IsStaff(role)
+}
+
 // DeletePostOpts 删帖选项：staff 软删必填类型与理由；作者自删传零值
 type DeletePostOpts struct {
 	DeleteType   string