feat: 实现域能系统

- 新增域能完整分层：EnergyLog/PostEnergizeLog/DailyExpSummary 模型、EnergyRepo、EnergyService、EnergyController/AdminEnergyController
- 支持签到获取域能(+1)、帖子赋能(-1/-2)/被赋能(+1/+2)、改名扣能(-6)/退款(+6)、删帖扣能(-2)
- 赋能单人单帖上限20域能，每日赋能获得经验上限50
- 管理员支持批量调整域能(owner)和查询域能日志(admin)
- LV0用户(exp<1)禁止签到和发帖，余额为负可签到/被赋能/删帖但不能赋能/改名
- 首次改名免费(通过HasCompletedTask判重)，改名扣能在提交审核时执行
- 移除导航栏手动签到按钮，签到融入域能系统(自动签到)
- 新增个人中心域能TAB展示余额和流水日志(近7天)
- 新增帖子详情页赋能按钮(轻赋/重赋)
- 管理后台新增域能管理和域能日志页面

internal/service/repository.go

@@ -79,9 +79,32 @@ type checkInStore interface {
 type taskStore interface {
 	FindTask(userID uint, taskType string) (*model.UserTask, error)
 	CreateTask(task *model.UserTask) error
+	HasTask(userID uint, taskType string) (bool, error)
 }
 
 // levelNotifier 等级升级通知接口
 type levelNotifier interface {
 	Create(userID uint, notifyType, title, content string, relatedID *uint) error
 }
+
+// energyStore EnergyService 所需的完整仓储接口
+type energyStore interface {
+	FindUserByID(userID uint) (*model.User, error)
+	FindPostByID(postID uint) (*model.Post, error)
+	AddEnergy(userID uint, amount int) error
+	IncrPostEnergy(postID uint, amount int) error
+	CreateEnergyLog(log *model.EnergyLog) error
+	SumUserPostEnergy(userID, postID uint) (int, error)
+	CreateEnergizeLog(log *model.PostEnergizeLog) error
+	GetDailyEnergizeExp(userID uint, date time.Time) (*model.DailyExpSummary, error)
+	UpsertDailyExp(summary *model.DailyExpSummary) error
+	AddDailyExp(userID uint, date time.Time, delta int) error
+	ListEnergyLogsByUser(userID uint, days int, offset, limit int) ([]model.EnergyLog, error)
+	CountEnergyLogsByUser(userID uint, days int) (int64, error)
+	ListAllEnergyLogs(energyType string, offset, limit int) ([]model.EnergyLog, int64, error)
+}
+
+// energyNotifier EnergyService 所需的通知接口（ISP）
+type energyNotifier interface {
+	Create(userID uint, notifyType, title, content string, relatedID *uint) error
+}