feat: 实现社区激励金（公户）系统，经济闭环

- 新增 CommunityFund / FundLog 模型（公户余额单行表 + 6种流水类型）
- 新增 FundRepo 仓储（GetBalance / IncrBalance / CreateLog / ListLogs / WithTx）
- 改造 EnergyService 五个方法：Energize 税收入公户、DeductOnRename/DeductOnDeletePost 入公户、RefundOnRenameReject 从公户支出、AdminAdjust 拆分为 admin_transfer/system_operation
- 新增 ErrInsufficientFund 错误哨兵
- 管理后台新增公户余额展示 + 公户流水页面 + 域能调整资金来源选择
- 新增 energy.css / energy.js 前端交互
- 侧边栏新增公户流水入口

internal/controller/admin/admin_energy_controller.go

@@ -10,10 +10,12 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-// adminEnergyUseCase AdminEnergyController 对 EnergyService 的最小依赖（ISP：2 个方法）
+// adminEnergyUseCase AdminEnergyController 对 EnergyService 的最小依赖（ISP：4 个方法）
 type adminEnergyUseCase interface {
-	AdminAdjust(operatorUID uint, userIDs []uint, amount int, description string) error
+	AdminAdjust(operatorUID uint, userIDs []uint, amount int, description string, mode string) error
 	GetAdminEnergyLogs(energyType string, page, pageSize int) ([]model.EnergyLog, int64, error)
+	GetFundBalance() (int, error)
+	GetFundLogs(logType string, page, pageSize int) ([]model.FundLog, int64, error)
 }
 
 // AdminEnergyController 后台域能管理控制器
@@ -26,17 +28,38 @@ func NewAdminEnergyController(energySvc adminEnergyUseCase) *AdminEnergyControll
 	return &AdminEnergyController{energySvc: energySvc}
 }
 
-// EnergyPage 域能管理页面
+// EnergyPage 域能管理页面（公户余额 + 用户域能调整）
 func (ac *AdminEnergyController) EnergyPage(c *gin.Context) {
+	balance := 0
+	if b, err := ac.energySvc.GetFundBalance(); err == nil {
+		balance = b
+	}
 	c.HTML(http.StatusOK, "admin/energy/index.html", common.BuildAdminPageData(c, gin.H{
-		"Title": "域能管理",
+		"Title":              "域能管理",
+		"ExtraCSS":           "/admin/static/css/energy.css",
+		"ExtraJS":            "/admin/static/js/energy.js",
+		"FundBalance":        balance,
+		"FundBalanceDisplay": float64(balance) / 10,
 	}))
 }
 
 // EnergyLogPage 域能日志页面
 func (ac *AdminEnergyController) EnergyLogPage(c *gin.Context) {
 	c.HTML(http.StatusOK, "admin/energy/logs.html", common.BuildAdminPageData(c, gin.H{
-		"Title": "域能日志",
+		"Title":    "域能日志",
+		"ExtraCSS": "/admin/static/css/energy.css",
+		"ExtraJS":  "/admin/static/js/energy.js",
+		"LogTypes": model.EnergyLogDisplayNames,
+	}))
+}
+
+// FundLogPage 公户流水页面
+func (ac *AdminEnergyController) FundLogPage(c *gin.Context) {
+	c.HTML(http.StatusOK, "admin/energy/fund_logs.html", common.BuildAdminPageData(c, gin.H{
+		"Title":    "公户流水",
+		"ExtraCSS": "/admin/static/css/energy.css",
+		"ExtraJS":  "/admin/static/js/energy.js",
+		"LogTypes": model.FundLogDisplayNames,
 	}))
 }
 
@@ -52,13 +75,32 @@ func (ac *AdminEnergyController) AdjustEnergy(c *gin.Context) {
 		UserIDs     []uint `json:"user_ids" binding:"required,min=1"`
 		Amount      int    `json:"amount" binding:"required"`
 		Description string `json:"description" binding:"required,min=1,max=500"`
+		Mode        string `json:"mode"`
 	}
 	if err := c.ShouldBindJSON(&req); err != nil {
 		common.Error(c, http.StatusBadRequest, "参数错误：需要 user_ids、amount 和 description")
 		return
 	}
 
-	if err := ac.energySvc.AdminAdjust(operatorUID.(uint), req.UserIDs, req.Amount, req.Description); err != nil {
+	// 默认模式为 admin_transfer
+	if req.Mode == "" {
+		req.Mode = model.FundTypeAdminTransfer
+	}
+
+	// system_operation 仅 owner 可用
+	if req.Mode == model.FundTypeSystemOperation {
+		role, _ := c.Get("role")
+		if !model.HasMinRole(role.(string), model.RoleOwner) {
+			common.Error(c, http.StatusForbidden, "仅站长可使用系统操作模式")
+			return
+		}
+	}
+
+	if err := ac.energySvc.AdminAdjust(operatorUID.(uint), req.UserIDs, req.Amount, req.Description, req.Mode); err != nil {
+		if err == common.ErrInsufficientFund {
+			common.Error(c, http.StatusBadRequest, "公户余额不足，无法执行操作")
+			return
+		}
 		common.Error(c, http.StatusInternalServerError, "调整失败")
 		return
 	}
@@ -101,3 +143,51 @@ func (ac *AdminEnergyController) ListEnergyLogs(c *gin.Context) {
 		"total_pages": common.PageCount(total, pageSize),
 	})
 }
+
+// GetFundBalance 获取公户余额
+func (ac *AdminEnergyController) GetFundBalance(c *gin.Context) {
+	balance, err := ac.energySvc.GetFundBalance()
+	if err != nil {
+		common.Error(c, http.StatusInternalServerError, "查询失败")
+		return
+	}
+	common.Ok(c, gin.H{
+		"balance":        balance,
+		"balance_display": float64(balance) / 10,
+	})
+}
+
+// ListFundLogs 查询公户流水
+func (ac *AdminEnergyController) ListFundLogs(c *gin.Context) {
+	logType := c.Query("type")
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+
+	logs, total, err := ac.energySvc.GetFundLogs(logType, page, pageSize)
+	if err != nil {
+		common.Error(c, http.StatusInternalServerError, "查询失败")
+		return
+	}
+
+	type logView struct {
+		model.FundLog
+		AmountDisplay float64 `json:"amount_display"`
+		TypeName      string  `json:"type_name"`
+	}
+	views := make([]logView, len(logs))
+	for i, l := range logs {
+		views[i] = logView{
+			FundLog:       l,
+			AmountDisplay: float64(l.Amount) / 10,
+			TypeName:      model.FundLogDisplayNames[l.Type],
+		}
+	}
+
+	common.Ok(c, gin.H{
+		"items":       views,
+		"total":       total,
+		"page":        page,
+		"page_size":   pageSize,
+		"total_pages": common.PageCount(total, pageSize),
+	})
+}