fix: auto-set mode:local after Gateway install + dashboard self-heal

- Setup flow: write mode:'local' to openclaw.json after Gateway install
- Dashboard: auto-heal missing mode field on load for existing users

src/pages/dashboard.js

@@ -76,6 +76,12 @@ async function loadDashboardData(page) {
   if (servicesRes.status === 'rejected') toast('服务状态加载失败', 'error')
   if (versionRes.status === 'rejected') toast('版本信息加载失败', 'error')
 
+  // 自愈：如果 openclaw.json 没有 mode 字段，自动设为 local，否则 Gateway 启动不了
+  if (config && !config.mode) {
+    config.mode = 'local'
+    api.writeOpenclawConfig(config).catch(() => {})
+  }
+
   renderStatCards(page, services, version, [], config, null)
   bindActions(page)
 

src/pages/setup.js

@@ -287,6 +287,18 @@ function bindEvents(page, nodeOk) {
         modal.appendLog('⚠️ Gateway 安装失败: ' + e)
       }
 
+      // 确保 openclaw.json 有 mode: "local"，否则 Gateway 启动不了
+      try {
+        const config = await api.readOpenclawConfig()
+        if (config && !config.mode) {
+          config.mode = 'local'
+          await api.writeOpenclawConfig(config)
+          modal.appendLog('✅ 已设置 Gateway 运行模式为 local')
+        }
+      } catch (e) {
+        modal.appendLog('⚠️ 配置 mode 失败: ' + e)
+      }
+
       toast('OpenClaw 安装成功', 'success')
       setTimeout(() => window.location.reload(), 1500)
     } catch (e) {