refactor: 优化账户过期检查逻辑和代码一致性

## 主要改进

### 1. 添加缺失的过期检查方法
- 在 `claudeConsoleAccountService` 中添加 `isSubscriptionExpired()` 方法
- 在 `ccrAccountService` 中添加 `isSubscriptionExpired()` 方法
- 与其他 7 个账户服务保持一致的实现方式

### 2. 统一过期检查逻辑
- 重构 `unifiedClaudeScheduler` 中的 5 处手动日期检查代码
- 统一调用服务层的 `isSubscriptionExpired()` 方法
- 消除重复代码，提升可维护性

### 3. 统一字段映射顺序
- 调整 Claude 账户更新端点的 `mapExpiryField()` 调用时机
- 与其他账户类型保持一致的处理顺序
- 提升代码可读性和一致性

## 技术细节

**修改文件**:
- `src/services/claudeConsoleAccountService.js`: 添加 `isSubscriptionExpired()`
- `src/services/ccrAccountService.js`: 添加 `isSubscriptionExpired()`
- `src/services/unifiedClaudeScheduler.js`: 5 处调用统一为服务方法
- `src/routes/admin.js`: 统一字段映射顺序

**改进效果**:
- ✅ 代码一致性提升：所有账户服务统一实现
- ✅ 可维护性提升：过期逻辑集中管理
- ✅ 减少重复代码：消除 4 处重复实现

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

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

src/services/ccrAccountService.js

@@ -913,6 +913,19 @@ class CcrAccountService {
       throw error
     }
   }
+
+  /**
+   * ⏰ 检查账户订阅是否过期
+   * @param {Object} account - 账户对象
+   * @returns {boolean} - true: 已过期, false: 未过期
+   */
+  isSubscriptionExpired(account) {
+    if (!account.subscriptionExpiresAt) {
+      return false // 未设置视为永不过期
+    }
+    const expiryDate = new Date(account.subscriptionExpiresAt)
+    return expiryDate <= new Date()
+  }
 }
 
 module.exports = new CcrAccountService()

src/services/claudeConsoleAccountService.js

@@ -1254,6 +1254,19 @@ class ClaudeConsoleAccountService {
       throw error
     }
   }
+
+  /**
+   * ⏰ 检查账户订阅是否过期
+   * @param {Object} account - 账户对象
+   * @returns {boolean} - true: 已过期, false: 未过期
+   */
+  isSubscriptionExpired(account) {
+    if (!account.subscriptionExpiresAt) {
+      return false // 未设置视为永不过期
+    }
+    const expiryDate = new Date(account.subscriptionExpiresAt)
+    return expiryDate <= new Date()
+  }
 }
 
 module.exports = new ClaudeConsoleAccountService()

src/services/unifiedClaudeScheduler.js

@@ -546,15 +546,11 @@ class UnifiedClaudeScheduler {
         }
 
         // 检查订阅是否过期
-        if (account.subscriptionExpiresAt) {
-          const expiryDate = new Date(account.subscriptionExpiresAt)
-          const now = new Date()
-          if (expiryDate <= now) {
-            logger.debug(
-              `⏰ Claude Console account ${account.name} (${account.id}) expired at ${account.subscriptionExpiresAt}`
-            )
-            continue
-          }
+        if (claudeConsoleAccountService.isSubscriptionExpired(account)) {
+          logger.debug(
+            `⏰ Claude Console account ${account.name} (${account.id}) expired at ${account.subscriptionExpiresAt}`
+          )
+          continue
         }
 
         // 主动触发一次额度检查，确保状态即时生效
@@ -655,15 +651,11 @@ class UnifiedClaudeScheduler {
           }
 
           // 检查订阅是否过期
-          if (account.subscriptionExpiresAt) {
-            const expiryDate = new Date(account.subscriptionExpiresAt)
-            const now = new Date()
-            if (expiryDate <= now) {
-              logger.debug(
-                `⏰ CCR account ${account.name} (${account.id}) expired at ${account.subscriptionExpiresAt}`
-              )
-              continue
-            }
+          if (ccrAccountService.isSubscriptionExpired(account)) {
+            logger.debug(
+              `⏰ CCR account ${account.name} (${account.id}) expired at ${account.subscriptionExpiresAt}`
+            )
+            continue
           }
 
           // 检查是否被限流
@@ -799,15 +791,11 @@ class UnifiedClaudeScheduler {
           return false
         }
         // 检查订阅是否过期
-        if (account.subscriptionExpiresAt) {
-          const expiryDate = new Date(account.subscriptionExpiresAt)
-          const now = new Date()
-          if (expiryDate <= now) {
-            logger.debug(
-              `⏰ Claude Console account ${account.name} (${accountId}) expired at ${account.subscriptionExpiresAt} (session check)`
-            )
-            return false
-          }
+        if (claudeConsoleAccountService.isSubscriptionExpired(account)) {
+          logger.debug(
+            `⏰ Claude Console account ${account.name} (${accountId}) expired at ${account.subscriptionExpiresAt} (session check)`
+          )
+          return false
         }
         // 检查是否超额
         try {
@@ -868,15 +856,11 @@ class UnifiedClaudeScheduler {
           return false
         }
         // 检查订阅是否过期
-        if (account.subscriptionExpiresAt) {
-          const expiryDate = new Date(account.subscriptionExpiresAt)
-          const now = new Date()
-          if (expiryDate <= now) {
-            logger.debug(
-              `⏰ CCR account ${account.name} (${accountId}) expired at ${account.subscriptionExpiresAt} (session check)`
-            )
-            return false
-          }
+        if (ccrAccountService.isSubscriptionExpired(account)) {
+          logger.debug(
+            `⏰ CCR account ${account.name} (${accountId}) expired at ${account.subscriptionExpiresAt} (session check)`
+          )
+          return false
         }
         // 检查是否超额
         try {
@@ -1400,15 +1384,11 @@ class UnifiedClaudeScheduler {
           }
 
           // 检查订阅是否过期
-          if (account.subscriptionExpiresAt) {
-            const expiryDate = new Date(account.subscriptionExpiresAt)
-            const now = new Date()
-            if (expiryDate <= now) {
-              logger.debug(
-                `⏰ CCR account ${account.name} (${account.id}) expired at ${account.subscriptionExpiresAt}`
-              )
-              continue
-            }
+          if (ccrAccountService.isSubscriptionExpired(account)) {
+            logger.debug(
+              `⏰ CCR account ${account.name} (${account.id}) expired at ${account.subscriptionExpiresAt}`
+            )
+            continue
           }
 
           // 检查是否被限流或超额