chore(WEB): actions.ts 에러 핸들링 및 CEO 대시보드 개선

- 전체 모듈 actions.ts redirect 에러 핸들링 추가
- CEODashboard DetailModal 추가
- MonthlyExpenseSection 개선
- fetch-wrapper redirect 에러 처리
- redirect-error 유틸 추가

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/lib/api/fetch-wrapper.ts

@@ -9,7 +9,7 @@
 
 import { cookies } from 'next/headers';
 import { redirect } from 'next/navigation';
-import { isRedirectError } from 'next/dist/client/components/redirect';
+import { isNextRedirectError } from '@/lib/utils/redirect-error';
 import { createErrorResponse, type ApiErrorResponse } from './errors';
 import { refreshAccessToken } from './refresh-token';
 
@@ -177,7 +177,7 @@ export async function serverFetch(
     return { response, error: null };
   } catch (error) {
     // Next.js 15: redirect()는 특수한 에러를 throw하므로 다시 throw해서 Next.js가 처리하도록 함
-    if (isRedirectError(error)) throw error;
+    if (isNextRedirectError(error)) throw error;
     console.error(`[serverFetch] Network error: ${url}`, error);
     return {
       response: null,