借款出借人线上确认借款并以站内通知直达（09-17-company-loan-principal-repayment）

- 新增出借人确认声明：财务发起，出借人本人查看原件后确认或退回；快照与决定不可改删，金额、日期、原件或身份变化后整组失效
- 余额确认接受纸质协议或有效线上声明二选一，代账余额核对材料仍必需；声明与公司代表授权分离
- 普通员工无常驻入口，财务发起后仅通知对应出借人并直达确认页
- 新增迁移 20261010010000_loan_lender_acknowledgements（仅新增三表）
- 测试：单测、隔离 HTTP/浏览器、完整借款回归；独立只读复核无阻断；同步发布记录与操作手册

Co-Authored-By: Claude Opus 5.5 <[email protected]>

scripts/qa/company-loan-http-fixture.cjs

@@ -421,6 +421,12 @@ module.exports = async function runLoanHttpFixture(pool, scratch) {
     // Incoming-receipt scenarios add lenders; in a full run they go last so they
     // cannot shift the pagination other browser scenarios rely on.
     const runIncoming = () => require('./company-loan-incoming-fixture.cjs')({ ...employeeHarness, verifiedLender });
+    const runLenderAck = () => require('./company-loan-lender-ack-fixture.cjs')({ ...employeeHarness, verifiedLender, admin, system });
+    if (process.env.RUN_ISOLATED_LOAN_ACK_ONLY === '1') {
+      const lenderAck = await runLenderAck();
+      if (process.env.RUN_ISOLATED_LOAN_BROWSER === '1') await require('./company-loan-lender-ack-browser.cjs')({ ...employeeHarness, lenderAck });
+      return;
+    }
     if (process.env.RUN_ISOLATED_LOAN_INCOMING_ONLY === '1') {
       const incomingReceipt = await runIncoming();
       if (process.env.RUN_ISOLATED_LOAN_BROWSER === '1') await require('./company-loan-incoming-browser.cjs')({ app, finance, otherFinance: await actor(['finance']), password, prisma, config, company, incomingReceipt });
@@ -1402,6 +1408,10 @@ module.exports = async function runLoanHttpFixture(pool, scratch) {
       await require('./company-loan-browser.cjs')({ app, finance, manager, ordinary, password, company, bank, lender, loan, config, prisma, attributionUi, reconciliationUi, relatedParty, employeeSources });
     }
     await runIncoming();
+    // Keep the new lenders last so existing pagination scenarios retain their
+    // own deterministic data; the acknowledgement UI handles its own pages.
+    const lenderAck = await runLenderAck();
+    if (process.env.RUN_ISOLATED_LOAN_BROWSER === '1') await require('./company-loan-lender-ack-browser.cjs')({ ...employeeHarness, lenderAck });
     console.log(JSON.stringify({ stage: 'loan_ledger_http', status: 'PASS', checks }));
   } finally { await app.close(); await prisma.$disconnect(); }
 };