关键修复: rename覆盖快照后旧连接仍读旧inode导致数据陈旧(今日永远0), 快照后重开数据库连接

server.js

@@ -76,8 +76,10 @@ function makeSnapshot() {
     src.exec(`VACUUM INTO '${tmp}'`);
     src.close();
     fs.renameSync(tmp, SNAP_PATH);
+    try { rdb.close(); } catch (_) {}
+    rdb = new Database(SNAP_PATH, { readonly: true });
     snapshotAt = new Date().toISOString();
-    console.log(`[snapshot] ok ${snapshotAt}`);
+    console.log(`[snapshot] ok ${snapshotAt} (reopened)`);
   } catch (e) {
     console.log(`[snapshot] failed(继续用旧快照): ${String(e.message).slice(0, 120)}`);
   }
@@ -88,7 +90,9 @@ if (RECRUITMENT_SRC) {
 } else {
   snapshotAt = fs.existsSync(SNAP_PATH) ? fs.statSync(SNAP_PATH).mtime.toISOString() : null;
 }
-const rdb = new Database(SNAP_PATH, { readonly: true });
+let rdb = new Database(SNAP_PATH, { readonly: true });
+// 注意: makeSnapshot 用 rename 覆盖快照文件后, 已打开的连接仍指向旧 inode(读到陈旧数据),
+// 必须在每次快照后重开连接(rdb 为 let 就是为此)。
 
 // ---------- 会话(内存态,重启需重登) ----------
 const sessions = new Map(); // sid -> { uid, role, expires }