更新依赖项，添加单元测试，优化用户信息和令牌管理功能，增强中间件以支持 JWT 验证，新增访问令牌模型并更新数据库迁移。

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/gin-contrib/sessions v0.0.5
 	github.com/gin-gonic/gin v1.9.1
 	github.com/golang-jwt/jwt/v4 v4.5.0
+	github.com/stretchr/testify v1.10.0
 	gopkg.in/yaml.v3 v3.0.1
 	gorm.io/datatypes v1.2.5
 	gorm.io/driver/sqlite v1.5.7
@@ -16,12 +17,14 @@ require (
 
 require (
 	filippo.io/edwards25519 v1.1.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-sql-driver/mysql v1.8.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/context v1.1.1 // indirect
 	github.com/gorilla/securecookie v1.1.1 // indirect
 	github.com/gorilla/sessions v1.2.1 // indirect
 	github.com/mattn/go-sqlite3 v2.0.3+incompatible // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gorm.io/driver/mysql v1.5.6 // indirect
 )