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/views/admin/AccountsView.vue

@@ -3,22 +3,18 @@
     <TablePageLayout>
       <template #filters>
         <div class="flex flex-wrap-reverse items-start justify-between gap-3">
-          <div class="min-w-0 flex-1">
-            <AccountTableFilters
-              v-model:searchQuery="params.search"
-              :filters="params"
-              @change="reload"
-              @update:searchQuery="debouncedReload"
-            />
-          </div>
-          <div class="flex-shrink-0">
-            <AccountTableActions
-              :loading="loading"
-              @refresh="load"
-              @sync="showSync = true"
-              @create="showCreate = true"
-            />
-          </div>
+          <AccountTableFilters
+            v-model:searchQuery="params.search"
+            :filters="params"
+            @change="reload"
+            @update:searchQuery="debouncedReload"
+          />
+          <AccountTableActions
+            :loading="loading"
+            @refresh="load"
+            @sync="showSync = true"
+            @create="showCreate = true"
+          />
         </div>
       </template>
       <template #table>
@@ -201,10 +197,10 @@ const handleViewStats = (a: Account) => { statsAcc.value = a; showStats.value =
 const handleReAuth = (a: Account) => { reAuthAcc.value = a; showReAuth.value = true }
 const handleRefresh = async (a: Account) => { try { await adminAPI.accounts.refreshCredentials(a.id); load() } catch {} }
 const handleResetStatus = async (a: Account) => { try { await adminAPI.accounts.clearError(a.id); appStore.showSuccess(t('common.success')); load() } catch {} }
-const handleClearRateLimit = async (a: Account) => { try { await adminAPI.accounts.clearError(a.id); appStore.showSuccess(t('common.success')); load() } catch {} }
+const handleClearRateLimit = async (a: Account) => { try { await adminAPI.accounts.clearRateLimit(a.id); appStore.showSuccess(t('common.success')); load() } catch {} }
 const handleDelete = (a: Account) => { deletingAcc.value = a; showDeleteDialog.value = true }
 const confirmDelete = async () => { if(!deletingAcc.value) return; try { await adminAPI.accounts.delete(deletingAcc.value.id); showDeleteDialog.value = false; deletingAcc.value = null; reload() } catch {} }
-const handleToggleSchedulable = async (a: Account) => { togglingSchedulable.value = a.id; try { await adminAPI.accounts.update(a.id, { schedulable: !a.schedulable }); load() } finally { togglingSchedulable.value = null } }
+const handleToggleSchedulable = async (a: Account) => { togglingSchedulable.value = a.id; try { await adminAPI.accounts.setSchedulable(a.id, !a.schedulable); load() } finally { togglingSchedulable.value = null } }
 const handleShowTempUnsched = (a: Account) => { tempUnschedAcc.value = a; showTempUnsched.value = true }
 const handleTempUnschedReset = async () => { if(!tempUnschedAcc.value) return; try { await adminAPI.accounts.clearError(tempUnschedAcc.value.id); showTempUnsched.value = false; tempUnschedAcc.value = null; load() } catch {} }