fix: golangci-lint 零告警通过 (57→0) + gofumpt/goimports 全量格式化

## CI 修复 (P0/P1)

P0 — 编译阻塞:
  - interfaces.go: postUseCase ISP 接口移除不用的 Create/Update/Delete

P1 — 必须修复:
  - ST1000: 为 13 个包添加包注释 (common/config/model/service/...)
  - ST1005: redis_store.go 全部错误消息改为小写开头
  - errcheck (19处): defer Close()→闭包忽略, notifier.Create→_=, r.Run→检查error
  - errorlint (9处): switch-on-error→errors.Is 链, ==→errors.Is
  - ST1020/ST1022: 导出符号注释以符号名开头

P2 — 安全评审:
  - gosec (12处): G203/G301/G304/G306 添加 nolint 注释并附理由

P3 — 清理:
  - unused: 移除 hasUnicode/energyStore/current/energyAdminUseCase
  - gofumpt + goimports 全量格式化 (35+ 文件)

internal/model/energy_log.go

@@ -4,20 +4,20 @@ import "time"
 
 // 域能流水类型常量
 const (
-	EnergyTypeSignIn      = "sign_in"
-	EnergyTypeRename      = "rename"
+	EnergyTypeSignIn       = "sign_in"
+	EnergyTypeRename       = "rename"
 	EnergyTypeRenameRefund = "rename_refund"
-	EnergyTypeEnergize    = "energize"
-	EnergyTypeEnergized   = "energized"
-	EnergyTypeDeletePost  = "delete_post"
-	EnergyTypeAdminAdjust = "admin_adjust"
+	EnergyTypeEnergize     = "energize"
+	EnergyTypeEnergized    = "energized"
+	EnergyTypeDeletePost   = "delete_post"
+	EnergyTypeAdminAdjust  = "admin_adjust"
 )
 
 // EnergyLog 域能流水记录
 type EnergyLog struct {
 	ID          uint      `gorm:"primarykey" json:"id"`
 	UserID      uint      `gorm:"index;not null" json:"user_id"`
-	Amount      int       `gorm:"not null" json:"amount"`                   // 变化量（乘10，正为增加，负为扣减）
+	Amount      int       `gorm:"not null" json:"amount"`                      // 变化量（乘10，正为增加，负为扣减）
 	Type        string    `gorm:"type:varchar(30);index;not null" json:"type"` // sign_in/rename/rename_refund/energize/energized/delete_post/admin_adjust
 	RelatedType string    `gorm:"type:varchar(30);default:''" json:"related_type,omitempty"`
 	RelatedID   uint      `gorm:"default:0" json:"related_id,omitempty"`
@@ -28,11 +28,11 @@ type EnergyLog struct {
 
 // EnergyLogDisplayNames 流水类型 → 中文名
 var EnergyLogDisplayNames = map[string]string{
-	EnergyTypeSignIn:      "每日签到",
-	EnergyTypeRename:      "改名消耗",
+	EnergyTypeSignIn:       "每日签到",
+	EnergyTypeRename:       "改名消耗",
 	EnergyTypeRenameRefund: "改名退款",
-	EnergyTypeEnergize:    "赋能消耗",
-	EnergyTypeEnergized:   "被赋能",
-	EnergyTypeDeletePost:  "删稿消耗",
-	EnergyTypeAdminAdjust: "后台调整",
+	EnergyTypeEnergize:     "赋能消耗",
+	EnergyTypeEnergized:    "被赋能",
+	EnergyTypeDeletePost:   "删稿消耗",
+	EnergyTypeAdminAdjust:  "后台调整",
 }