重构代码结构，优化连接管理和日志记录

server/web/models/user.go

@@ -0,0 +1,14 @@
+package models
+
+import "gorm.io/gorm"
+
+type User struct {
+	gorm.Model
+	Password string
+	Username string
+	Email    string
+	Phone    string
+	Name     string
+
+	Channels []Channel `gorm:"foreignKey:UserId"`
+}