refactor: reorganize modules and add Linux build tooling

module/base/mgt/internal/models/link_role_pmn.go

@@ -0,0 +1,40 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// 角色预设权限关联表
+type MgtLinkRolePmn struct {
+	RoleId    uint      `gorm:"column:role_id;primaryKey" json:"role_id"`                     // 角色ID
+	AppId     uint      `gorm:"column:app_id;primaryKey" json:"app_id"`                       // 应用ID
+	PmnId     uint      `gorm:"column:pmn_id;primaryKey" json:"pmn_id"`                       // 权限ID
+	CreatedAt time.Time `gorm:"column:created_at;autoCreateTime" json:"created_at,omitempty"` // 创建时间
+}
+
+func (MgtLinkRolePmn) TableName() string {
+	return "mgt_link_role_pmn"
+}
+
+// func init() {
+// 	database.AppendMigrate(&MgtLinkRolePmn{})
+// }
+
+// AfterDelete钩子：仅当该角色在该应用下不再拥有任何权限时，移除角色-应用关联
+func (l *MgtLinkRolePmn) AfterDelete(tx *gorm.DB) error {
+	var count int64
+	if err := tx.Model(&MgtLinkRolePmn{}).
+		Where("app_id = ? AND role_id = ?", l.AppId, l.RoleId).
+		Count(&count).Error; err != nil {
+		return err
+	}
+	if count == 0 {
+		if err := tx.Where("app_id = ? AND role_id = ?", l.AppId, l.RoleId).
+			Delete(&MgtLinkRoleApp{}).Error; err != nil {
+			return err
+		}
+	}
+	return nil
+}