Merge branch 'fix/account-filters-menu-missing-features'

## Summary
- 修复账号管理页面组件拆分时遗漏的功能
- 统一所有内联 SVG 为 Icon 组件
- 修复 ProxySelector 选择"无代理"时发送错误值的问题

## Changes
- AccountTableFilters: 添加 Antigravity 平台选项、类型筛选器、inactive 状态
- AccountActionMenu: 恢复重置状态和清除限速按钮
- AccountsView: 修正 handleClearRateLimit 调用正确的 API
- ProxySelector: 修复选择"无代理"时发送 null 而不是 0

## Conflict Resolution
- ProxySelector.vue: 采用 PR 分支的正确逻辑（发送 null 而不是 0）
  这是正确的修复，因为后端使用 *int64 类型，nil 会触发 ClearProxyID()

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

@@ -37,10 +37,21 @@ watch(() => props.show, (v) => { if(v) { form.amount = 0; form.notes = '' } })
 
 const calculateNewBalance = () => (props.user ? (props.operation === 'add' ? props.user.balance + form.amount : props.user.balance - form.amount) : 0)
 const handleBalanceSubmit = async () => {
-  if (!props.user) return; submitting.value = true
+  if (!props.user) return
+  if (!form.amount || form.amount <= 0) {
+    appStore.showError(t('admin.users.amountRequired'))
+    return
+  }
+  if (props.operation === 'subtract' && form.amount > props.user.balance) {
+    appStore.showError(t('admin.users.insufficientBalance'))
+    return
+  }
+  submitting.value = true
   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 (e: any) {
+    appStore.showError(e.response?.data?.detail || t('common.error'))
+  } finally { submitting.value = false }
 }
 </script>

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

@@ -17,7 +17,7 @@
             <input v-model="form.password" type="text" required class="input pr-10" :placeholder="t('admin.users.enterPassword')" />
           </div>
           <button type="button" @click="generateRandomPassword" class="btn btn-secondary px-3">
-            <svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M16.023 9.348h4.992v-.001M2.985 19.644v-4.992m0 0h4.992m-4.993 0l3.181 3.183a8.25 8.25 0 0013.803-3.7M4.031 9.865a8.25 8.25 0 0113.803-3.7l3.181 3.182m0-4.991v4.99" /></svg>
+            <Icon name="refresh" size="md" />
           </button>
         </div>
       </div>
@@ -52,6 +52,7 @@ import { reactive, watch } from 'vue'
 import { useI18n } from 'vue-i18n'; import { adminAPI } from '@/api/admin'
 import { useForm } from '@/composables/useForm'
 import BaseDialog from '@/components/common/BaseDialog.vue'
+import Icon from '@/components/icons/Icon.vue'
 
 const props = defineProps<{ show: boolean }>()
 const emit = defineEmits(['close', 'success']); const { t } = useI18n()

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

@@ -21,7 +21,7 @@
             </button>
           </div>
           <button type="button" @click="generatePassword" class="btn btn-secondary px-3">
-            <svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5"><path stroke-linecap="round" stroke-linejoin="round" d="M16.023 9.348h4.992v-.001M2.985 19.644v-4.992m0 0h4.992m-4.993 0l3.181 3.183a8.25 8.25 0 0013.803-3.7M4.031 9.865a8.25 8.25 0 0113.803-3.7l3.181 3.182m0-4.991v4.99" /></svg>
+            <Icon name="refresh" size="md" />
           </button>
         </div>
       </div>
@@ -59,6 +59,7 @@ import { adminAPI } from '@/api/admin'
 import type { User, UserAttributeValuesMap } from '@/types'
 import BaseDialog from '@/components/common/BaseDialog.vue'
 import UserAttributeForm from '@/components/user/UserAttributeForm.vue'
+import Icon from '@/components/icons/Icon.vue'
 
 const props = defineProps<{ show: boolean, user: User | null }>()
 const emit = defineEmits(['close', 'success'])
@@ -86,6 +87,14 @@ const copyPassword = async () => {
 }
 const handleUpdateUser = async () => {
   if (!props.user) return
+  if (!form.email.trim()) {
+    appStore.showError(t('admin.users.emailRequired'))
+    return
+  }
+  if (form.concurrency < 1) {
+    appStore.showError(t('admin.users.concurrencyMin'))
+    return
+  }
   submitting.value = true
   try {
     const data: any = { email: form.email, username: form.username, notes: form.notes, concurrency: form.concurrency }
@@ -98,4 +107,4 @@ const handleUpdateUser = async () => {
     appStore.showError(e.response?.data?.detail || t('admin.users.failedToUpdate'))
   } finally { submitting.value = false }
 }
-</script>
+</script>