fix(前端): 修复 ESLint 代码规范问题

- 修复 AccountTableFilters.vue 中的 vue/no-mutating-props 错误，使用 emit 模式替代直接修改 props
- 修复 TypeScript 类型错误，支持 Select 组件的 null 值类型
- 为所有空 catch 块添加错误日志，提升代码可维护性和调试能力
- 涉及文件：AccountTableFilters.vue, UserAllowedGroupsModal.vue, UserApiKeysModal.vue, UserBalanceModal.vue, AccountsView.vue, UsageView.vue, DashboardView.vue, ProfileView.vue

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/components/admin/user/UserAllowedGroupsModal.vue

@@ -48,12 +48,12 @@ const emit = defineEmits(['close', 'success']); const { t } = useI18n(); const a
 const groups = ref<Group[]>([]); const selectedIds = ref<number[]>([]); const loading = ref(false); const submitting = ref(false)
 
 watch(() => props.show, (v) => { if(v && props.user) { selectedIds.value = props.user.allowed_groups || []; load() } })
-const load = async () => { loading.value = true; try { const res = await adminAPI.groups.list(1, 1000); groups.value = res.items.filter(g => g.subscription_type === 'standard' && g.status === 'active') } catch {} finally { loading.value = false } }
+const load = async () => { loading.value = true; try { const res = await adminAPI.groups.list(1, 1000); groups.value = res.items.filter(g => g.subscription_type === 'standard' && g.status === 'active') } catch (error) { console.error('Failed to load groups:', error) } finally { loading.value = false } }
 const handleSave = async () => {
   if (!props.user) return; submitting.value = true
   try {
     await adminAPI.users.update(props.user.id, { allowed_groups: selectedIds.value.length > 0 ? selectedIds.value : null })
     appStore.showSuccess(t('admin.users.allowedGroupsUpdated')); emit('success'); emit('close')
-  } catch {} finally { submitting.value = false }
+  } catch (error) { console.error('Failed to update allowed groups:', error) } finally { submitting.value = false }
 }
 </script>

frontend/src/components/admin/user/UserApiKeysModal.vue

@@ -42,6 +42,6 @@ const apiKeys = ref<ApiKey[]>([]); const loading = ref(false)
 watch(() => props.show, (v) => { if (v && props.user) load() })
 const load = async () => {
   if (!props.user) return; loading.value = true
-  try { const res = await adminAPI.users.getUserApiKeys(props.user.id); apiKeys.value = res.items || [] } catch {} finally { loading.value = false }
+  try { const res = await adminAPI.users.getUserApiKeys(props.user.id); apiKeys.value = res.items || [] } catch (error) { console.error('Failed to load API keys:', error) } finally { loading.value = false }
 }
 </script>

frontend/src/components/admin/user/UserBalanceModal.vue

@@ -41,6 +41,6 @@ const handleBalanceSubmit = async () => {
   try {
     await adminAPI.users.updateBalance(props.user.id, form.amount, props.operation, form.notes)
     appStore.showSuccess(t('common.success')); emit('success'); emit('close')
-  } catch {} finally { submitting.value = false }
+  } catch (error) { console.error('Failed to update balance:', error) } finally { submitting.value = false }
 }
 </script>