修复 consume 缺行不建行导致 sentTotal 丢失的问题

server/src/quota.js

@@ -38,12 +38,17 @@ function grant(openid, count = 1) {
   return getBalance(openid)
 }
 
+// 消费：即便该 openid 从未 grant 过也要建行，否则 sentTotal 会静默丢失
+// （新建行 balance 直接落 0，等价于「从 0 扣减再取 MAX(0, ...)」）
 function consume(openid, count = 1) {
   const n = _normalize(count)
   db.prepare(`
-    UPDATE subscribe_quota
-    SET balance = MAX(0, balance - @n), sentTotal = sentTotal + @n, updateTime = @now
-    WHERE openid = @openid
+    INSERT INTO subscribe_quota (openid, balance, grantedTotal, sentTotal, updateTime)
+    VALUES (@openid, 0, 0, @n, @now)
+    ON CONFLICT(openid) DO UPDATE SET
+      balance    = MAX(0, balance - @n),
+      sentTotal  = sentTotal + @n,
+      updateTime = @now
   `).run({ openid, n, now: Date.now() })
   return getBalance(openid)
 }