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/scripts/update_doc_translations.go

@@ -1,4 +1,4 @@
-package main
+package main
 
 import (
 	"fmt"
@@ -131,7 +131,7 @@ func main() {
 		},
 		"faq-api-key": {
 			TitleEn:   "How to Get API Key?",
-			ContentEn: "# How to Get API Key?\n\n## Steps\n\n1. Login to developer dashboard\n2. Go to \"Application Management\" page\n3. Create new application or select existing one\n4. In application details page you can see:\n   - **AppID**: Application unique identifier\n   - **AppKey**: Application key\n   - **SecretKey**: Encryption key\n\n## Notes\n\n- AppKey is only shown once when created, please save it in time\n- Click \"Reset Key\" button to reset AppKey if needed\n- Old key becomes invalid immediately after reset\n- SecretKey is for server-side response verification, do not use it on client side",
+			ContentEn: "# How to Get API Key?\n\n## Steps\n\n1. Login to admin dashboard\n2. Go to \"Application Management\" page\n3. Create new application or select existing one\n4. In application details page you can see:\n   - **AppID**: Application unique identifier\n   - **AppKey**: Application key\n   - **SecretKey**: Encryption key\n\n## Notes\n\n- AppKey is only shown once when created, please save it in time\n- Click \"Reset Key\" button to reset AppKey if needed\n- Old key becomes invalid immediately after reset\n- SecretKey is for server-side response verification, do not use it on client side",
 			SummaryEn: "Detailed steps to get API key",
 		},
 		"faq-card-fail": {
@@ -141,7 +141,7 @@ func main() {
 		},
 		"faq-agent": {
 			TitleEn:   "How to Implement Agent Authorization?",
-			ContentEn: "# How to Implement Agent Authorization?\n\n## What is Agent Authorization?\n\nAgent authorization allows developers to authorize their applications to other developers, who can then generate card keys and sell them.\n\n## Authorization Process\n\n1. **Apply for Authorization**\n   - Authorized party submits application to authorizer\n   - Enter application ID\n   - Wait for authorizer approval\n\n2. **Approve Authorization**\n   - Authorizer views application\n   - Set card key type permissions after approval\n   - Set agent discount\n\n3. **Generate Card Keys**\n   - Authorized party selects authorized application\n   - Select card key types with permission\n   - Generate and sell card keys\n\n4. **Settle Revenue**\n   - Sales revenue is settled proportionally\n   - Authorized party receives income\n\n## Permission Management\n\n- Authorizer can modify card key type permissions at any time\n- Can pause or terminate authorization\n- Can view agent's sales data",
+			ContentEn: "# How to Implement Agent Authorization?\n\n## What is Agent Authorization?\n\nAgent authorization allows admins to authorize their applications to other admins, who can then generate card keys and sell them.\n\n## Authorization Process\n\n1. **Apply for Authorization**\n   - Authorized party submits application to authorizer\n   - Enter application ID\n   - Wait for authorizer approval\n\n2. **Approve Authorization**\n   - Authorizer views application\n   - Set card key type permissions after approval\n   - Set agent discount\n\n3. **Generate Card Keys**\n   - Authorized party selects authorized application\n   - Select card key types with permission\n   - Generate and sell card keys\n\n4. **Settle Revenue**\n   - Sales revenue is settled proportionally\n   - Authorized party receives income\n\n## Permission Management\n\n- Authorizer can modify card key type permissions at any time\n- Can pause or terminate authorization\n- Can view agent's sales data",
 			SummaryEn: "Implementation process and permission management for agent authorization",
 		},
 	}