fix 一键组合只上传邮箱列表，服务端再从数据库加载完整账号

tests/aistudio_large_batch_request.test.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+const root = path.join(__dirname, '..');
+const appSource = fs.readFileSync(path.join(root, 'public', 'app.js'), 'utf8');
+const operationsSource = fs.readFileSync(path.join(root, 'src', 'routes', 'operations.js'), 'utf8');
+const databaseSource = fs.readFileSync(path.join(root, 'src', 'core', 'database.js'), 'utf8');
+
+assert.match(
+  appSource,
+  /taskType === 'aistudio_combo'[\s\S]{0,300}accountEmails:\s*taskAccounts\.map/,
+  'AI Studio 一键组合必须只提交邮箱引用，不能上传完整账号对象',
+);
+assert.match(
+  operationsSource,
+  /taskType === 'aistudio_combo'[\s\S]{0,120}Array\.isArray\(req\.body\.accountEmails\)/,
+  '服务端必须接受 AI Studio 邮箱引用列表',
+);
+assert.match(
+  operationsSource,
+  /db\.getAccountsByEmails\(requestedEmails\)/,
+  '服务端必须从数据库重新加载完整账号',
+);
+assert.match(
+  databaseSource,
+  /for \(let i = 0; i < normalizedEmails\.length; i \+= 200\)/,
+  '批量账号查询必须分块，避免 SQLite 绑定参数上限',
+);
+
+const emailOnlyPayload = {
+  taskType: 'aistudio_combo',
+  accountEmails: Array.from({ length: 10513 }, (_, index) => `account-${index}@example.com`),
+  params: { threadCount: 1 },
+};
+assert(
+  Buffer.byteLength(JSON.stringify(emailOnlyPayload), 'utf8') < 10 * 1024 * 1024,
+  '10513 个邮箱的 AI Studio 请求必须低于 10MB',
+);
+
+console.log('aistudio large batch request tests passed');