fix: remove default kiro.rs admin URL

tests/background-account-history-settings.test.js

@@ -134,7 +134,7 @@ const FIVE_SIM_SUPPORTED_COUNTRY_ID_SET = new Set(['indonesia', 'thailand', 'vie
 const HERO_SMS_SUPPORTED_COUNTRY_ID_SET = new Set(['6', '52', '10']);
 const self = {
   MultiPageFlowRegistry: {
-    DEFAULT_KIRO_RS_URL: 'https://kiro.leftcode.xyz/admin',
+    DEFAULT_KIRO_RS_URL: '',
     normalizeFlowId(value, fallback = 'openai') {
       const normalized = String(value || '').trim().toLowerCase();
       if (normalized === 'kiro') {
@@ -277,7 +277,7 @@ return {
   assert.equal(api.normalizePersistentSettingValue('activeFlowId', 'codex'), 'openai');
   assert.equal(api.normalizePersistentSettingValue('activeFlowId', 'kiro'), 'kiro');
   assert.equal(api.normalizePersistentSettingValue('kiroTargetId', 'unknown'), 'kiro-rs');
-  assert.equal(api.normalizePersistentSettingValue('kiroRsUrl', ''), 'https://kiro.leftcode.xyz/admin');
+  assert.equal(api.normalizePersistentSettingValue('kiroRsUrl', ''), '');
   assert.equal(api.normalizePersistentSettingValue('kiroRsKey', ' key-1 '), 'key-1');
   assert.equal(api.normalizePersistentSettingValue('phoneSmsProvider', '5SIM'), '5sim');
   assert.equal(api.normalizePersistentSettingValue('phoneSmsProvider', 'NEXSMS'), 'nexsms');

tests/background-settings-schema-persistence.test.js

@@ -101,7 +101,7 @@ const PERSISTED_SETTING_DEFAULTS = {
   ipProxyService: '711proxy',
   ipProxyMode: 'account',
   kiroTargetId: 'kiro-rs',
-  kiroRsUrl: 'https://kiro.leftcode.xyz/admin',
+  kiroRsUrl: '',
   kiroRsKey: '',
   stepExecutionRangeByFlow: {},
 };

tests/sidepanel-flow-source-registry.test.js

@@ -39,6 +39,7 @@ test('sidepanel html exposes flow selector and kiro source fields', () => {
     'id="label-source-selector"',
     'id="row-step6-cookie-settings"',
     'id="row-kiro-rs-url"',
+    'id="btn-open-kiro-rs-github"',
     'id="row-kiro-rs-key"',
     'id="btn-test-kiro-rs"',
     'id="row-kiro-rs-test-status"',