fix: 修复对话框在错误时不关闭的问题

- 在UserManagement.vue的handleModalOk中添加错误时关闭对话框
- 在RoleManagement.vue的handleModalOk中添加错误时关闭对话框
- 确保即使API调用失败，对话框也会正确关闭

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

@@ -381,6 +381,7 @@ const handleModalOk = async () => {
     modalVisible.value = false
     fetchData()
   } catch (error) {
+    modalVisible.value = false
     if (error !== 'cancel') {
       handleApiError(error)
     }

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

@@ -398,6 +398,7 @@ const handleModalOk = async () => {
     modalVisible.value = false
     fetchData()
   } catch (error) {
+    modalVisible.value = false
     if (error !== 'cancel') {
       handleApiError(error)
     }