refactor(web): 工作台与监控视图 UI 优化

- MonitorSelectionPanel / VehicleMonitorPanel / SelectionDetailPanel 等工作台面板交互与展示优化
- carActionExecute：前往站点遇 404（旧 DLL 无 goto-site 路由）时回退 WebGotoSite，并给出热更新指引
- 地图监控、任务分配、反射管理等视图细节调整；theme.css 补充样式

frontends/apps/simple-platform-vue/src/utils/carActionExecute.ts

@@ -47,14 +47,41 @@ export async function pickTargetSiteOnMap(): Promise<number | null> {
   }
 }
 
+function isHttp404(e: unknown): boolean {
+  if (e && typeof e === 'object' && 'response' in e) {
+    const status = (e as { response?: { status?: number } }).response?.status
+    if (status === 404) return true
+  }
+  const msg = e instanceof Error ? e.message : String(e)
+  return /status code 404/i.test(msg)
+}
+
 export async function executeCarGotoSite(carId: number, siteId: number): Promise<boolean> {
   try {
     const r = await reflectionApi.gotoCarSite(carId, siteId)
     ElMessage.success(r.message || `已下发前往站点 #${siteId}`)
     return true
   } catch (e) {
-    ElMessage.error(`前往站点失败：${e instanceof Error ? e.message : String(e)}`)
-    return false
+    if (!isHttp404(e)) {
+      ElMessage.error(`前往站点失败：${e instanceof Error ? e.message : String(e)}`)
+      return false
+    }
+    // goto-site 路由未加载（旧 DLL）：回退 execute WebGotoSite（DummyCar / Car 上均有）
+    try {
+      const r2 = await reflectionApi.execute('car', carId, 'WebGotoSite', { siteId })
+      ElMessage.success(r2.returnValue ? `已执行：${r2.returnValue}` : `已下发前往站点 #${siteId}`)
+      return true
+    } catch (e2) {
+      const msg2 = e2 instanceof Error ? e2.message : String(e2)
+      const needDeploy =
+        /WebGotoSite|goto-site|不存在可调用方法/i.test(msg2)
+      ElMessage.error(
+        needDeploy
+          ? `${msg2}。当前 SimpleLite 仍是旧版 DLL：请先完全关闭 SimpleLite 窗口，再在 PowerShell 执行 Migu2.0/scripts/redeploy-simplelite.ps1，然后重新登录；或调用 POST /api/health/simplelite/restart-for-update`
+          : `前往站点失败：${msg2}`
+      )
+      return false
+    }
   }
 }