feat: 完善平台总后台模块

backend/api/internal/models/fin_settlement.go

@@ -0,0 +1,19 @@
+package models
+
+import (
+	"git.apinb.com/bsm-sdk/core/database"
+	"time"
+)
+
+// FinSettlement 对应 fin_settlement，保存结算单。
+type FinSettlement struct {
+	Entity
+	SettlementNo string    `gorm:"column:settlement_no;type:varchar(64);not null;uniqueIndex" json:"settlement_no"`
+	SubjectType  string    `gorm:"column:subject_type;type:varchar(32);not null" json:"subject_type"`
+	SubjectID    uint64    `gorm:"column:subject_id;not null;index" json:"subject_id"`
+	PeriodStart  time.Time `gorm:"column:period_start;type:timestamptz;not null" json:"period_start"`
+	PeriodEnd    time.Time `gorm:"column:period_end;type:timestamptz;not null" json:"period_end"`
+}
+
+func init()                                    { database.AppendMigrate(&FinSettlement{}) }
+func (table *FinSettlement) TableName() string { return "fin_settlement" }