feat: 完善多平台账户管理和API Keys页面展示

- 修复OpenAI路由中的gpt-5模型ID处理
- 增强统一调度器的账户选择日志输出
- 优化OAuth流程中的账户类型处理
- 完善API Keys页面的多平台账户信息展示

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

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

src/services/unifiedGeminiScheduler.js

@@ -38,6 +38,8 @@ class UnifiedGeminiScheduler {
           logger.info(
             `🎯 Using bound dedicated Gemini account: ${boundAccount.name} (${apiKeyData.geminiAccountId}) for API key ${apiKeyData.name}`
           )
+          // 更新账户的最后使用时间
+          await geminiAccountService.markAccountUsed(apiKeyData.geminiAccountId)
           return {
             accountId: apiKeyData.geminiAccountId,
             accountType: 'gemini'
@@ -62,6 +64,8 @@ class UnifiedGeminiScheduler {
             logger.info(
               `🎯 Using sticky session account: ${mappedAccount.accountId} (${mappedAccount.accountType}) for session ${sessionHash}`
             )
+            // 更新账户的最后使用时间
+            await geminiAccountService.markAccountUsed(mappedAccount.accountId)
             return mappedAccount
           } else {
             logger.warn(
@@ -108,6 +112,9 @@ class UnifiedGeminiScheduler {
         `🎯 Selected account: ${selectedAccount.name} (${selectedAccount.accountId}, ${selectedAccount.accountType}) with priority ${selectedAccount.priority} for API key ${apiKeyData.name}`
       )
 
+      // 更新账户的最后使用时间
+      await geminiAccountService.markAccountUsed(selectedAccount.accountId)
+
       return {
         accountId: selectedAccount.accountId,
         accountType: selectedAccount.accountType
@@ -378,6 +385,8 @@ class UnifiedGeminiScheduler {
               logger.info(
                 `🎯 Using sticky session account from group: ${mappedAccount.accountId} (${mappedAccount.accountType}) for session ${sessionHash}`
               )
+              // 更新账户的最后使用时间
+              await geminiAccountService.markAccountUsed(mappedAccount.accountId)
               return mappedAccount
             }
           }
@@ -473,6 +482,9 @@ class UnifiedGeminiScheduler {
         `🎯 Selected account from Gemini group ${group.name}: ${selectedAccount.name} (${selectedAccount.accountId}, ${selectedAccount.accountType}) with priority ${selectedAccount.priority}`
       )
 
+      // 更新账户的最后使用时间
+      await geminiAccountService.markAccountUsed(selectedAccount.accountId)
+
       return {
         accountId: selectedAccount.accountId,
         accountType: selectedAccount.accountType