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
   )

gym-manage-web/src/views/system/Dashboard.vue

@@ -199,10 +199,10 @@ const fetchStats = async () => {
       request.get('/logs/operation/count')
     ])
     
-    stats.userCount = userCountRes.status === 'fulfilled' ? (userCountRes.value || 0) : 0
-    stats.roleCount = roleCountRes.status === 'fulfilled' ? (roleCountRes.value || 0) : 0
-    stats.todayLogin = todayLoginRes.status === 'fulfilled' ? (todayLoginRes.value || 0) : 0
-    stats.operationLog = operationLogRes.status === 'fulfilled' ? (operationLogRes.value || 0) : 0
+    stats.userCount = userCountRes.status === 'fulfilled' ? Number(userCountRes.value || 0) : 0
+    stats.roleCount = roleCountRes.status === 'fulfilled' ? Number(roleCountRes.value || 0) : 0
+    stats.todayLogin = todayLoginRes.status === 'fulfilled' ? Number(todayLoginRes.value || 0) : 0
+    stats.operationLog = operationLogRes.status === 'fulfilled' ? Number(operationLogRes.value || 0) : 0
   } catch (error) {
     console.error('Failed to fetch stats:', error)
   } finally {

gym-manage-web/src/views/system/RoleManagement.vue

@@ -282,7 +282,7 @@ const fetchData = async () => {
       roleName: searchKeyword.value || undefined
     })
     dataSource.value = res.content
-    pagination.total = res.totalElements
+    pagination.total = Number(res.totalElements) || 0
   } catch (error) {
     handleApiError(error)
   } finally {

gym-manage-web/src/views/system/UserManagement.vue

@@ -294,7 +294,7 @@ const fetchData = async () => {
       keyword: searchKeyword.value || undefined
     })
     dataSource.value = res.content
-    pagination.total = res.totalElements
+    pagination.total = Number(res.totalElements) || 0
   } catch (error) {
     handleApiError(error)
   } finally {
@@ -433,6 +433,7 @@ const handleAssignRolesOk = async () => {
     roleDialogVisible.value = false
     fetchData()
   } catch (error) {
+    roleDialogVisible.value = false
     handleApiError(error)
   }
 }