添加 OIDC 和 OAuth2 服务器的基础结构，包括配置、数据库模型、服务、处理器和路由。新增登录页面模板，支持用户认证和授权流程。

models/authorization_code.go

@@ -0,0 +1,22 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type AuthorizationCode struct {
+	gorm.Model
+	Code        string    `gorm:"uniqueIndex;not null"`
+	ClientID    string    `gorm:"not null"`
+	UserID      uint      `gorm:"not null"`
+	RedirectURI string    `gorm:"not null"`
+	Scope       string    `gorm:"not null"`
+	ExpiresAt   time.Time `gorm:"not null"`
+	Used        bool      `gorm:"default:false"`
+}
+
+func (ac *AuthorizationCode) TableName() string {
+	return "oauth_authorization_codes"
+}

models/client.go

@@ -0,0 +1,23 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type Client struct {
+	gorm.Model
+	ClientID     string   `gorm:"uniqueIndex;not null"`
+	ClientSecret string   `gorm:"not null"`
+	RedirectURIs []string `gorm:"type:json"`
+	GrantTypes   []string `gorm:"type:json"`
+	Scopes       []string `gorm:"type:json"`
+	IsActive     bool     `gorm:"default:true"`
+	CreatedAt    time.Time
+	UpdatedAt    time.Time
+}
+
+func (c *Client) TableName() string {
+	return "oauth_clients"
+}

models/migration.go

@@ -0,0 +1,14 @@
+package models
+
+import (
+	"gorm.io/gorm"
+)
+
+// AutoMigrate 自动迁移数据库表结构
+func AutoMigrate(db *gorm.DB) error {
+	return db.AutoMigrate(
+		&User{},
+		&Client{},
+		&AuthorizationCode{},
+	)
+}

models/user.go

@@ -0,0 +1,22 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type User struct {
+	gorm.Model
+	Username  string `gorm:"uniqueIndex;not null"`
+	Password  string `gorm:"not null"`
+	Email     string `gorm:"uniqueIndex"`
+	LastLogin time.Time
+	IsActive  bool `gorm:"default:true"`
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
+
+func (u *User) TableName() string {
+	return "users"
+}