test: move demo-rebuild assertion to end of phase A (reseed invalidates earlier fixture)

sync-server/src/index.mjs

@@ -226,6 +226,7 @@ const server = http.createServer(async (req, res) => {
         const remote = await deleteUserCascade(db, target);
         console.log('[footprints-sync] 用户已删除:', target.username, '（图床文件 ' + remote + ' 个）');
         return send(200, true, { ok: true, username: target.username, remote_deleted: remote });
+      }
 
       // 重建演示账号：级联删除现有 demo → 重新注册 → 重新播种
       if (req.method === 'POST' && route === '/admin/demo-rebuild') {
@@ -238,7 +239,6 @@ const server = http.createServer(async (req, res) => {
         console.log('[footprints-sync] demo 账号已重建:', JSON.stringify(seeded));
         return send(200, true, { ok: true, seeded });
       }
-      }
 
       if (req.method === 'GET' && route === '/admin/invites') {
         const invites = db.prepare(`