fix(auth): support dynamic OSS callbacks and LangBot Account copy (#2428)

* fix(auth): support dynamic OSS callbacks and LangBot Account copy

* style(web): format LangBot Account copy

---------

Co-authored-by: dadachann <185672915+dadachann@users.noreply.github.com>

web/tests/unit/langbot-account-terminology.test.mjs

@@ -0,0 +1,47 @@
+import assert from 'node:assert/strict';
+import { readdirSync, readFileSync } from 'node:fs';
+import test from 'node:test';
+
+const localeDir = new URL('../../src/i18n/locales/', import.meta.url);
+const localeFiles = readdirSync(localeDir).filter((name) =>
+  name.endsWith('.ts'),
+);
+
+const deprecatedAccountCopy = [
+  /Initialize with Space/i,
+  /Login with Space/i,
+  /Logging in with Space/i,
+  /Space login/i,
+  /Space accounts?/i,
+  /Bind Space Account/i,
+  /Authorize with Space/i,
+  /通过 Space 登录/,
+  /使用 Space 登录/,
+  /Space 登录/,
+  /Space 账户/,
+  /Space 帳戶/,
+  /绑定 Space/,
+  /綁定 Space/,
+  /Space アカウント/,
+  /Space でログイン/,
+  /cuenta de Space/i,
+  /cuentas de Space/i,
+  /cuenta Space/i,
+  /tài khoản Space/i,
+  /บัญชี Space/,
+  /аккаунт(?:ов|а)? Space/i,
+  /аккаунт Space/i,
+];
+
+test('user-facing account authentication copy uses LangBot Account terminology', () => {
+  const violations = [];
+
+  for (const file of localeFiles) {
+    const source = readFileSync(new URL(file, localeDir), 'utf8');
+    for (const pattern of deprecatedAccountCopy) {
+      if (pattern.test(source)) violations.push(`${file}: ${pattern}`);
+    }
+  }
+
+  assert.deepEqual(violations, []);
+});