fix(desktop): session persistence — refresh/login/context/empty-content 4-bug fix

1. App.tsx: add restoreSession() call on startup to prevent redirect
   to login page after refresh (isRestoring guard + BootstrapScreen)
2. CloneManager: call syncAgents() after loadClones() to restore
   currentAgent and conversation history on app load
3. zclaw-memory: add get_or_create_session() so frontend session UUID
   is persisted directly — kernel no longer creates mismatched IDs
4. openai.rs: assistant message content must be non-empty for
   Kimi/Qwen APIs — replace empty content with meaningful placeholders

Also includes admin-v2 ModelServices unified page (merge providers +
models + API keys into expandable row layout)

admin-v2/src/pages/Dashboard.tsx

@@ -3,7 +3,7 @@
 // ============================================================
 
 import { useQuery } from '@tanstack/react-query'
-import { Card, Col, Row, Statistic, Table, Tag, Typography, Spin, Alert } from 'antd'
+import { Card, Col, Row, Statistic, Table, Tag, Spin } from 'antd'
 import {
   TeamOutlined,
   CloudServerOutlined,
@@ -13,34 +13,18 @@ import {
 } from '@ant-design/icons'
 import { statsService } from '@/services/stats'
 import { logService } from '@/services/logs'
+import { PageHeader } from '@/components/PageHeader'
+import { ErrorState } from '@/components/ErrorState'
+import { actionLabels, actionColors } from '@/constants/status'
 import type { OperationLog } from '@/types'
 
-const { Title } = Typography
-
-const actionLabels: Record<string, string> = {
-  login: '登录', logout: '登出',
-  create_account: '创建账号', update_account: '更新账号', delete_account: '删除账号',
-  create_provider: '创建服务商', update_provider: '更新服务商', delete_provider: '删除服务商',
-  create_model: '创建模型', update_model: '更新模型', delete_model: '删除模型',
-  create_token: '创建密钥', revoke_token: '撤销密钥',
-  update_config: '更新配置',
-  create_prompt: '创建提示词', update_prompt: '更新提示词', archive_prompt: '归档提示词',
-  desktop_audit: '桌面端审计',
-}
-
-const actionColors: Record<string, string> = {
-  login: 'green', logout: 'default',
-  create_account: 'blue', update_account: 'orange', delete_account: 'red',
-  create_provider: 'blue', update_provider: 'orange', delete_provider: 'red',
-  create_model: 'blue', update_model: 'orange', delete_model: 'red',
-  create_token: 'blue', revoke_token: 'red',
-  update_config: 'orange',
-  create_prompt: 'blue', update_prompt: 'orange', archive_prompt: 'red',
-  desktop_audit: 'default',
-}
-
 export default function Dashboard() {
-  const { data: stats, isLoading: statsLoading, error: statsError } = useQuery({
+  const {
+    data: stats,
+    isLoading: statsLoading,
+    error: statsError,
+    refetch: refetchStats,
+  } = useQuery({
     queryKey: ['dashboard-stats'],
     queryFn: ({ signal }) => statsService.dashboard(signal),
   })
@@ -51,15 +35,28 @@ export default function Dashboard() {
   })
 
   if (statsError) {
-    return <Alert type="error" message="加载仪表盘数据失败" description={(statsError as Error).message} showIcon />
+    return (
+      <>
+        <PageHeader title="仪表盘" description="系统概览与最近活动" />
+        <ErrorState
+          message={(statsError as Error).message}
+          onRetry={() => refetchStats()}
+        />
+      </>
+    )
   }
 
   const statCards = [
-    { title: '总账号', value: stats?.total_accounts ?? 0, icon: <TeamOutlined />, color: '#1677ff' },
-    { title: '活跃服务商', value: stats?.active_providers ?? 0, icon: <CloudServerOutlined />, color: '#52c41a' },
-    { title: '活跃模型', value: stats?.active_models ?? 0, icon: <ApiOutlined />, color: '#722ed1' },
-    { title: '今日请求', value: stats?.tasks_today ?? 0, icon: <ThunderboltOutlined />, color: '#fa8c16' },
-    { title: '今日 Token', value: ((stats?.tokens_today_input ?? 0) + (stats?.tokens_today_output ?? 0)), icon: <ColumnWidthOutlined />, color: '#eb2f96' },
+    { title: '总账号', value: stats?.total_accounts ?? 0, icon: <TeamOutlined />, color: '#863bff' },
+    { title: '活跃服务商', value: stats?.active_providers ?? 0, icon: <CloudServerOutlined />, color: '#47bfff' },
+    { title: '活跃模型', value: stats?.active_models ?? 0, icon: <ApiOutlined />, color: '#22c55e' },
+    { title: '今日请求', value: stats?.tasks_today ?? 0, icon: <ThunderboltOutlined />, color: '#f59e0b' },
+    {
+      title: '今日 Token',
+      value: (stats?.tokens_today_input ?? 0) + (stats?.tokens_today_output ?? 0),
+      icon: <ColumnWidthOutlined />,
+      color: '#ef4444',
+    },
   ]
 
   const logColumns = [
@@ -74,7 +71,13 @@ export default function Dashboard() {
         </Tag>
       ),
     },
-    { title: '目标类型', dataIndex: 'target_type', key: 'target_type', width: 100, render: (v: string | null) => v || '-' },
+    {
+      title: '目标类型',
+      dataIndex: 'target_type',
+      key: 'target_type',
+      width: 100,
+      render: (v: string | null) => v || '-',
+    },
     {
       title: '时间',
       dataIndex: 'created_at',
@@ -86,19 +89,34 @@ export default function Dashboard() {
 
   return (
     <div>
-      <Title level={4} style={{ marginBottom: 24 }}>仪表盘</Title>
+      <PageHeader title="仪表盘" description="系统概览与最近活动" />
 
-      <Row gutter={[16, 16]} style={{ marginBottom: 24 }}>
+      {/* Stat Cards */}
+      <Row gutter={[16, 16]} className="mb-6">
         {statsLoading ? (
-          <Col span={24}><Spin /></Col>
+          <Col span={24}>
+            <div className="flex justify-center py-8">
+              <Spin size="large" />
+            </div>
+          </Col>
         ) : (
           statCards.map((card) => (
             <Col xs={24} sm={12} md={8} lg={4} key={card.title}>
-              <Card>
+              <Card
+                className="hover:shadow-md transition-shadow duration-200"
+                styles={{ body: { padding: '20px 24px' } }}
+              >
                 <Statistic
-                  title={card.title}
+                  title={
+                    <span className="text-neutral-500 dark:text-neutral-400 text-xs font-medium uppercase tracking-wide">
+                      {card.title}
+                    </span>
+                  }
                   value={card.value}
-                  prefix={<span style={{ color: card.color }}>{card.icon}</span>}
+                  valueStyle={{ fontSize: 28, fontWeight: 600, color: card.color }}
+                  prefix={
+                    <span style={{ color: card.color, marginRight: 4 }}>{card.icon}</span>
+                  }
                 />
               </Card>
             </Col>
@@ -106,7 +124,16 @@ export default function Dashboard() {
         )}
       </Row>
 
-      <Card title="最近操作日志" size="small">
+      {/* Recent Logs */}
+      <Card
+        title={
+          <span className="text-sm font-semibold text-neutral-700 dark:text-neutral-300">
+            最近操作日志
+          </span>
+        }
+        size="small"
+        styles={{ body: { padding: 0 } }}
+      >
         <Table<OperationLog>
           columns={logColumns}
           dataSource={logsData?.items ?? []}