feat: latest code update

backend/src/modules/user/quota.service.ts

@@ -47,15 +47,6 @@ export class QuotaService {
     if (!user) throw new HttpException('用户不存在', HttpStatus.NOT_FOUND)
     if (user.plan !== 'free') return
 
-    // Backward compat: migrate remaining → freeOptimizeUsed
-    if ((user.freeOptimizeUsed ?? 0) <= 0 && (user.remaining ?? 0) > 0 && (user.resumeOptimizeCredits ?? 0) <= 0) {
-      const migrateCount = Math.min(user.remaining, FREE_OPTIMIZE_LIMIT)
-      await this.userModel.findByIdAndUpdate(userId, {
-        $set: { freeOptimizeUsed: migrateCount, remaining: Math.max(0, user.remaining - migrateCount) },
-      }).exec()
-      this.logger.log(`Migrated remaining=${user.remaining} → freeOptimizeUsed=${migrateCount} for user ${userId}`)
-    }
-
     // Try paid credits first
     const paid = await this.userModel.findOneAndUpdate(
       { _id: userId, resumeOptimizeCredits: { $gt: 0 } },
@@ -63,6 +54,13 @@ export class QuotaService {
     ).exec()
     if (paid) return
 
+    // Try old remaining credits (backward compat)
+    const oldRemaining = await this.userModel.findOneAndUpdate(
+      { _id: userId, remaining: { $gt: 0 } },
+      { $inc: { remaining: -1 } },
+    ).exec()
+    if (oldRemaining) return
+
     // Then free limit
     const freeResult = await this.userModel.findOneAndUpdate(
       { _id: userId, freeOptimizeUsed: { $lt: FREE_OPTIMIZE_LIMIT } },