fix(ui): 9项端到端真实审计 — 修复记忆/技能/审计/工作区/MCP数据流断裂

基于 Tauri MCP 实机排查发现并修复：

1. VikingPanel: viking_ls('/') 返回0 → 改为 viking_ls('') 返回100条记忆
2. 技能列表: loadSkillsCatalog 静默失败 → 添加直接 invoke('skill_list') 回退
3. 审计日志: 面板读Gateway API无数据 → 回退读localStorage双源数据
4. 工作区: 浏览按钮无事件 → 接入prompt选择 + workspace_dir_stats 命令
5. MCP: 空列表无引导 → 添加配置文件路径提示
6. 新增 workspace_dir_stats Tauri 命令 (Rust)

排查确认正常的功能: 安全存储(OS Keyring✅), 心跳引擎(运行中✅),
定时任务(管道连通), Kernel(已初始化✅), SaaS relay模式

desktop/src/components/Settings/MCPServices.tsx

@@ -180,14 +180,19 @@ export function MCPServices() {
             </div>
           );
         }) : (
-          <div className="p-8 text-center text-sm text-gray-400">
-            当前快速配置中尚未声明 MCP 服务
+          <div className="p-8 text-center">
+            <div className="text-sm text-gray-400 mb-2">尚未配置 MCP 服务</div>
+            <div className="text-xs text-gray-300">
+              MCP 服务为 Agent 扩展外部工具能力。可通过编辑配置文件
+              <code className="mx-1 text-gray-500 bg-gray-100 px-1 rounded">config/mcp.toml</code>
+              添加服务。
+            </div>
           </div>
         )}
       </div>
 
       <div className="text-xs text-amber-700 bg-amber-50 rounded-lg p-3">
-        新增服务、删除服务和详细参数配置尚未在桌面端接入。可通过配置文件手动添加。
+        新增/删除服务尚未在桌面端 UI 接入。可通过编辑 config/mcp.toml 手动添加 MCP 服务配置，重启后生效。
       </div>
     </div>
   );

desktop/src/components/Settings/Skills.tsx

@@ -17,6 +17,9 @@ export function Skills() {
   useEffect(() => {
     if (connected) {
       loadSkillsCatalog().catch(silentErrorHandler('Skills'));
+    } else {
+      // In Tauri mode, try loading even without 'connected' state
+      loadSkillsCatalog().catch(() => { /* direct invoke fallback handles this */ });
     }
   }, [connected]);
 

desktop/src/components/Settings/Workspace.tsx

@@ -1,4 +1,5 @@
 import { useEffect, useState } from 'react';
+import { invoke } from '@tauri-apps/api/core';
 import { useConfigStore } from '../../store/configStore';
 import { silentErrorHandler } from '../../lib/error-utils';
 
@@ -8,6 +9,17 @@ export function Workspace() {
   const loadWorkspaceInfo = useConfigStore((s) => s.loadWorkspaceInfo);
   const saveQuickConfig = useConfigStore((s) => s.saveQuickConfig);
   const [projectDir, setProjectDir] = useState('~/.zclaw/zclaw-workspace');
+  const [dirStats, setDirStats] = useState<{ fileCount: number; totalSize: number } | null>(null);
+
+  // Load real directory stats via Tauri command
+  const loadDirStats = async (dir: string) => {
+    try {
+      const stats = await invoke<{ file_count: number; total_size: number }>('workspace_dir_stats', { path: dir });
+      setDirStats({ fileCount: stats.file_count, totalSize: stats.total_size });
+    } catch {
+      // Command may not exist in all modes — fallback to workspaceInfo
+    }
+  };
 
   useEffect(() => {
     loadWorkspaceInfo().catch(silentErrorHandler('Workspace'));
@@ -22,6 +34,18 @@ export function Workspace() {
     setProjectDir(nextValue);
     await saveQuickConfig({ workspaceDir: nextValue });
     await loadWorkspaceInfo();
+    await loadDirStats(nextValue);
+  };
+
+  const handleBrowse = async () => {
+    // Dialog plugin not available — user types path manually
+    const dir = prompt('输入工作区目录路径:', projectDir);
+    if (dir && dir.trim()) {
+      setProjectDir(dir.trim());
+      await saveQuickConfig({ workspaceDir: dir.trim() });
+      await loadWorkspaceInfo();
+      await loadDirStats(dir.trim());
+    }
   };
 
   const handleToggle = async (
@@ -51,13 +75,20 @@ export function Workspace() {
             onBlur={() => { handleWorkspaceBlur().catch(silentErrorHandler('Workspace')); }}
             className="flex-1 px-3 py-2 border border-gray-200 rounded-lg text-sm bg-gray-50 focus:outline-none"
           />
-          <button className="text-xs px-4 py-2 border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors">
+          <button
+            onClick={() => { handleBrowse().catch(silentErrorHandler('Workspace')); }}
+            className="text-xs px-4 py-2 border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors"
+          >
             浏览
           </button>
         </div>
         <div className="mt-3 space-y-1 text-xs text-gray-500">
-          <div>当前解析路径：{workspaceInfo?.resolvedPath || '未解析'}</div>
-          <div>文件数：{workspaceInfo?.fileCount ?? 0}，大小：{workspaceInfo?.totalSize ?? 0} bytes</div>
+          <div>当前解析路径：{workspaceInfo?.resolvedPath || projectDir}</div>
+          <div>
+            文件数：{dirStats?.fileCount ?? workspaceInfo?.fileCount ?? 0}
+            {dirStats && `，大小：${(dirStats.totalSize / 1024).toFixed(1)} KB`}
+            {!dirStats && workspaceInfo?.totalSize ? `，大小：${workspaceInfo.totalSize} bytes` : ''}
+          </div>
         </div>
       </div>
 

desktop/src/components/VikingPanel.tsx

@@ -46,9 +46,9 @@ export function VikingPanel() {
       setStatus(vikingStatus);
 
       if (vikingStatus.available) {
-        // Load memory count
+        // Load memory count (use empty path — viking_ls('') returns all, viking_ls('/') returns 0)
         try {
-          const resources = await listVikingResources('/');
+          const resources = await listVikingResources('');
           setMemoryCount(resources.length);
         } catch {
           setMemoryCount(null);