feat: 实现OpenAI账户管理和统一调度系统

- 新增 OpenAI 账户管理服务，支持多账户轮询和负载均衡
- 实现统一的 OpenAI API 调度器，智能选择最优账户
- 优化成本计算器，支持更精确的 token 计算
- 更新模型定价数据，包含最新的 OpenAI 模型价格
- 增强 API Key 管理，支持更灵活的配额控制
- 改进管理界面，添加教程视图和账户分组管理
- 优化限流配置组件，提供更直观的用户体验

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/services/apiKeyService.js

@@ -19,7 +19,8 @@ class ApiKeyService {
       claudeAccountId = null,
       claudeConsoleAccountId = null,
       geminiAccountId = null,
-      permissions = 'all', // 'claude', 'gemini', 'all'
+      openaiAccountId = null,
+      permissions = 'all', // 'claude', 'gemini', 'openai', 'all'
       isActive = true,
       concurrencyLimit = 0,
       rateLimitWindow = null,
@@ -50,6 +51,7 @@ class ApiKeyService {
       claudeAccountId: claudeAccountId || '',
       claudeConsoleAccountId: claudeConsoleAccountId || '',
       geminiAccountId: geminiAccountId || '',
+      openaiAccountId: openaiAccountId || '',
       permissions: permissions || 'all',
       enableModelRestriction: String(enableModelRestriction),
       restrictedModels: JSON.stringify(restrictedModels || []),
@@ -81,6 +83,7 @@ class ApiKeyService {
       claudeAccountId: keyData.claudeAccountId,
       claudeConsoleAccountId: keyData.claudeConsoleAccountId,
       geminiAccountId: keyData.geminiAccountId,
+      openaiAccountId: keyData.openaiAccountId,
       permissions: keyData.permissions,
       enableModelRestriction: keyData.enableModelRestriction === 'true',
       restrictedModels: JSON.parse(keyData.restrictedModels),
@@ -167,6 +170,7 @@ class ApiKeyService {
           claudeAccountId: keyData.claudeAccountId,
           claudeConsoleAccountId: keyData.claudeConsoleAccountId,
           geminiAccountId: keyData.geminiAccountId,
+          openaiAccountId: keyData.openaiAccountId,
           permissions: keyData.permissions || 'all',
           tokenLimit: parseInt(keyData.tokenLimit),
           concurrencyLimit: parseInt(keyData.concurrencyLimit || 0),
@@ -299,6 +303,7 @@ class ApiKeyService {
         'claudeAccountId',
         'claudeConsoleAccountId',
         'geminiAccountId',
+        'openaiAccountId',
         'permissions',
         'expiresAt',
         'enableModelRestriction',