fix: translate two-factor authentication deadline banner (#776)

Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

Author: mvanhorn

locals.js

@@ -1977,7 +1977,7 @@ I18N["zh-CN"]["public"] = { // 公共区域翻译
         }],
 
         // 其他翻译
-        [/to enable two-factor authentication as an additional security measure. Your activity on GitHub includes you in this requirement. You will need to enable two-factor authentication on your account before ([^ ]+), or be restricted from account actions./, "启用双因素身份验证（2FA）作为额外安全措施。您在 GitHub 上的活动让您接收到此要求。您将需要在 $1 前启用双因素身份验证，否则会被限制账户操作。"],
+        [/to enable two-factor authentication as an additional security measure. Your activity on GitHub includes you in this requirement. You will need to enable two-factor authentication on your account before ?(.+?), or be restricted from account actions./, "启用双因素身份验证（2FA）作为额外安全措施。您在 GitHub 上的活动让您接收到此要求。您将需要在 $1 前启用双因素身份验证，否则会被限制账户操作。"],
     ],
     "time-regexp": [ // 时间正则翻译专项
         /**

test/issue-775-regression.test.cjs

@@ -0,0 +1,54 @@
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+const test = require('node:test');
+const vm = require('node:vm');
+
+const messagePrefix = 'to enable two-factor authentication as an additional security measure. Your activity on GitHub includes you in this requirement. You will need to enable two-factor authentication on your account before';
+const messageSuffix = ', or be restricted from account actions.';
+
+function loadPublicRules() {
+    const filePath = path.join(__dirname, '..', 'locals.js');
+    const context = vm.createContext({});
+
+    vm.runInContext(fs.readFileSync(filePath, 'utf8'), context, {
+        filename: filePath,
+    });
+
+    return context.I18N['zh-CN'].public.regexp;
+}
+
+function loadTwoFactorDeadlineRule() {
+    const rule = loadPublicRules().find(([pattern]) => (
+        pattern.source.includes('to enable two-factor authentication as an additional security measure')
+    ));
+
+    assert.ok(rule, 'the public dictionary should include the two-factor deadline rule');
+    return rule;
+}
+
+function translateDeadline(deadline, separator = '') {
+    const [pattern, replacement] = loadTwoFactorDeadlineRule();
+    return `${messagePrefix}${separator}${deadline}${messageSuffix}`.replace(pattern, replacement);
+}
+
+test('translates a joined two-factor authentication deadline', () => {
+    assert.equal(
+        translateDeadline('2026年9月14日'),
+        '启用双因素身份验证（2FA）作为额外安全措施。您在 GitHub 上的活动让您接收到此要求。您将需要在 2026年9月14日 前启用双因素身份验证，否则会被限制账户操作。',
+    );
+});
+
+test('continues to translate a spaced two-factor authentication deadline', () => {
+    assert.equal(
+        translateDeadline('2026年9月14日', ' '),
+        '启用双因素身份验证（2FA）作为额外安全措施。您在 GitHub 上的活动让您接收到此要求。您将需要在 2026年9月14日 前启用双因素身份验证，否则会被限制账户操作。',
+    );
+});
+
+test('preserves a different two-factor authentication deadline', () => {
+    const translated = translateDeadline('October 3, 2027');
+
+    assert.match(translated, /October 3, 2027/);
+    assert.doesNotMatch(translated, /or be restricted from account actions/);
+});