[codex] add coding plan site initialization flow (#351)

* add coding plan site initialization flow

* fix ci for coding plan site init flow

* address coding plan review comments

src/server/services/platforms/sub2api.ts

@@ -9,9 +9,10 @@ import {
   type SiteAnnouncement,
   UserInfo,
 } from './base.js';
+import { stripTrailingSlashes } from '../urlNormalization.js';
 
 function normalizeBaseUrl(baseUrl: string): string {
-  return (baseUrl || '').replace(/\/+$/, '');
+  return stripTrailingSlashes(baseUrl || '');
 }
 
 /**

src/server/services/platforms/titleHint.ts

@@ -1,3 +1,5 @@
+import { stripTrailingSlashes } from '../urlNormalization.js';
+
 export type TitleHintPlatform =
   | 'anyrouter'
   | 'done-hub'
@@ -34,7 +36,7 @@ function normalizeBaseUrl(url: string): string {
     const parsed = new URL(trimmed);
     return `${parsed.protocol}//${parsed.host}`;
   } catch {
-    return trimmed.replace(/\/+$/, '');
+    return stripTrailingSlashes(trimmed);
   }
 }