完善借款、编号、付款与预算并发及验收（09-06-release-gate-integrity）

汇总已落盘的借款本金与还款、兼容历史编号的周期化编号、付款责任与回单核验、报销进度和排序、PWA/采购事务、错误原因与日期校验及ERP退役。
统一共享预算池锁序和锁后判断，恢复差旅原预算选择，补原因码固定夹具及反向完整性检查。
纳入配套迁移、测试、受管QA、分层验收合同、规约及任务记录；原始证据留在ignored artifacts。

关联任务：09-17-company-loan-principal-repayment、09-17-erp-exclusive-retirement、09-18-reimbursement-periodic-numbering、09-08-reimbursement-payment-closeout、09-18-local-concurrency-product-fixes、09-19-budget-pool-concurrency、09-05-error-explainability-payment-readiness。
预算补审由Claude定向验证2文件928项通过，原4446/28及r6结果仍仅对应各自历史输入；本轮未重跑测试。
完整新候选门禁、R1真实入口接入与12项公网义务仍开放。生产编号未启用、差旅仍冻结；不推送、不部署，不宣称发布资格。

scripts/qa/browser-environment-probe.mjs

@@ -66,11 +66,28 @@ export async function observeGuestEntry(context, baseURL, timeout = 30000) {
   return observed;
 }
 
+async function observeNativeEngine(engine, name, owner) {
+  const server = await engine.launchServer({ headless: true, host: "127.0.0.1" });
+  let browser;
+  try {
+    const browserNamespace = namespaceFingerprint(server.process().pid);
+    if (browserNamespace !== owner.ownedNamespace) throw new Error("environment_browser_namespace_mismatch");
+    browser = await engine.connect(server.wsEndpoint());
+    const context = await browser.newContext({ serviceWorkers: "block" });
+    const page = await context.newPage();
+    const online = await page.evaluate(() => navigator.onLine);
+    return { name, version: browser.version(), valid: online === true, online, browserNamespace, browserMatchesOwnedChild: true, noNavigatorOverride: true };
+  } finally {
+    await browser?.close().catch(() => {});
+    await server.close();
+  }
+}
+
 async function main(mode, baseURL) {
   if (!["native", "guest"].includes(mode)) throw new Error("environment_probe_mode_invalid");
   const { context: owner } = verifyManagedEnvironment();
   const require = createRequire(path.join(root, "client/package.json"));
-  const { chromium } = require("@playwright/test");
+  const { chromium, webkit } = require("@playwright/test");
   const server = await chromium.launchServer({ headless: true, host: "127.0.0.1" });
   let browser;
   let context;
@@ -89,6 +106,8 @@ async function main(mode, baseURL) {
       const page = await context.newPage();
       const online = await page.evaluate(() => navigator.onLine);
       result = { valid: online === true, scope: "blank-page-native-probe", online, errorKind: online === true ? null : online === false ? "native_online_observed_false" : "native_online_observation_missing", browserNamespace, browserMatchesOwnedChild, noNavigatorOverride: true };
+      result.engines = [{ name: "chromium", version: browser.version(), valid: online === true, online, browserNamespace, browserMatchesOwnedChild, noNavigatorOverride: true }, await observeNativeEngine(webkit, "webkit", owner)];
+      result.valid = result.engines.every(engine => engine.valid);
     } else result = { ...await observeGuestEntry(context, baseURL), browserNamespace, browserMatchesOwnedChild, noNavigatorOverride: true };
     verifyManagedEnvironment();
   } catch (error) {