fix: 订阅模式登录验证、永久会员类型区分、动态代码HTTP返回值修复、侧边栏滚动位置保持

- 修复订阅模式登录时错误检查余额的问题
- 区分无限余额和永久订阅两种永久会员类型
- 修复动态代码HTTP请求返回值在JS中无法正确访问的问题
- 添加侧边栏滚动位置保持功能
- 移除developer角色相关代码，统一使用admin
- 添加缺失的i18n翻译key

backend/internal/model/models.go

@@ -365,7 +365,7 @@ type Ticket struct {
 	Title         string         `gorm:"size:200" json:"title"`
 	Content       string         `gorm:"type:text" json:"content"`
 	Category      string         `gorm:"size:50" json:"category"`                // account, payment, technical, feature, other
-	Type          string         `gorm:"size:50" json:"type"`                    // user, agent, developer
+	Type          string         `gorm:"size:50" json:"type"`                    // user, agent, admin
 	Status        string         `gorm:"size:20;default:open" json:"status"`     // open, processing, resolved, closed
 	Priority      string         `gorm:"size:20;default:normal" json:"priority"` // low, normal, high, urgent
 	AssignedTo    *uint          `json:"assigned_to"`                            // 分配给的应用开发者ID或平台管理员ID
@@ -464,7 +464,7 @@ type CloudVariable struct {
 	OriginalName    string         `gorm:"size:255" json:"original_name"`
 	FileMD5         string         `gorm:"size:32" json:"file_md5"`
 	Scope           string         `gorm:"size:20;default:app" json:"scope"`
-	WritePermission string         `gorm:"size:20;default:developer" json:"write_permission"`
+	WritePermission string         `gorm:"size:20;default:admin" json:"write_permission"`
 	Description     string         `gorm:"size:255" json:"description"`
 	Status          string         `gorm:"size:20;default:active" json:"status"`
 	CreatedAt       time.Time      `json:"created_at"`
@@ -555,7 +555,7 @@ type AgentApplication struct {
 	ID            uint           `gorm:"primaryKey" json:"id"`
 	AgentID       uint           `json:"agent_id"`
 	ApplicationID uint           `json:"application_id"`
-	DeveloperID   uint           `json:"developer_id"`
+	AdminID       uint           `json:"admin_id"`
 	Discount      float64        `gorm:"default:1.0" json:"discount"`
 	Status        string         `gorm:"size:20;default:active" json:"status"`
 	IsReceived    bool           `gorm:"default:false" json:"is_received"`
@@ -565,7 +565,7 @@ type AgentApplication struct {
 
 	Agent       User                       `gorm:"foreignKey:AgentID;references:ID" json:"agent,omitempty"`
 	Application Application                `gorm:"foreignKey:ApplicationID;references:ID" json:"application,omitempty"`
-	Developer   User                       `gorm:"foreignKey:DeveloperID;references:ID" json:"developer,omitempty"`
+	Admin       User                       `gorm:"foreignKey:AdminID;references:ID" json:"admin,omitempty"`
 	CardTypes   []AgentApplicationCardType `gorm:"foreignKey:AgentApplicationID" json:"card_types,omitempty"`
 }
 
@@ -586,7 +586,7 @@ type AgentApplicationCardType struct {
 type AgentApplicationRequest struct {
 	ID            uint           `gorm:"primaryKey" json:"id"`
 	AgentID       uint           `json:"agent_id"`
-	DeveloperID   uint           `json:"developer_id"`
+	AdminID       uint           `json:"admin_id"`
 	ApplicationID uint           `json:"application_id"`
 	Type          string         `gorm:"size:20" json:"type"`
 	Status        string         `gorm:"size:20;default:pending" json:"status"`
@@ -597,7 +597,7 @@ type AgentApplicationRequest struct {
 	DeletedAt     gorm.DeletedAt `gorm:"index" json:"-"`
 
 	Agent       User        `gorm:"foreignKey:AgentID" json:"agent,omitempty"`
-	Developer   User        `gorm:"foreignKey:DeveloperID" json:"developer,omitempty"`
+	Admin       User        `gorm:"foreignKey:AdminID" json:"admin,omitempty"`
 	Application Application `gorm:"foreignKey:ApplicationID" json:"application,omitempty"`
 }