Add recovery Excel export and automatic account detection

koc-portal/tests/rendered-html.test.mjs

@@ -31,8 +31,10 @@ test("keeps claiming minimal and backfill one-to-one", async () => {
   assert.match(page, /claimantIdentifier:\s*claimantName/);
   assert.match(page, /const \[quantity, setQuantity\] = useState\(1\)/);
   assert.match(page, /distributionId:\s*selected\.id/);
-  assert.match(page, /发布账号昵称/);
+  assert.doesNotMatch(page, /发布账号昵称/);
+  assert.doesNotMatch(page, /accountNickname/);
   assert.match(page, /发布链接/);
+  assert.match(page, /识别发布账号/);
   assert.match(page, /inputMode="url"/);
   assert.match(page, /长链、短链或整段分享文案/);
   assert.doesNotMatch(page, /type="url"/);