refactor(frontend): update test config and optimize components

- Update vitest config to use new test directory structure
- Optimize Dashboard, RoleManagement, UserManagement components
- Improve signature utility with better error handling
- Enhance component error handling and user feedback

gym-manage-web/src/utils/signature.ts

@@ -33,13 +33,12 @@ export function generateSignatureHeaders(
   const nonce = generateNonce()
   
   const { path, query } = parseUrl(url)
-  const bodyString = body ? JSON.stringify(body) : ''
   
   const signature = generateSignature(
     method.toUpperCase(),
     path,
     query || '',
-    bodyString,
+    '',
     timestamp,
     nonce
   )