optim fpstest ui and try to fix steam path related crash

src/app/layout.tsx

@@ -19,12 +19,31 @@ export default function RootLayout({ children }: { children: React.ReactNode })
     void init()
 
     void listen<string>("tray://launch_game", async (event) => {
-      await invoke("launch_game", {
-        steamPath: `${steamStore.state.steamDir}\\steam.exe`,
-        launchOption: toolStore.state.launchOptions[toolStore.state.launchIndex].option || "",
-        server: event.payload || "worldwide",
-      })
-      addToast({ title: `启动${event.payload === "worldwide" ? "国际服" : "国服"}成功` })
+      // 验证路径
+      if (!steamStore.state.steamDir || !steamStore.state.steamDirValid) {
+        addToast({ 
+          title: "Steam 路径无效，请先配置路径", 
+          color: "warning" 
+        })
+        return
+      }
+      try {
+        await invoke("launch_game", {
+          steamPath: `${steamStore.state.steamDir}\\steam.exe`,
+          launchOption: toolStore.state.launchOptions[toolStore.state.launchIndex].option || "",
+          server: event.payload || "worldwide",
+        })
+        addToast({ 
+          title: `启动${event.payload === "worldwide" ? "国际服" : "国服"}成功`, 
+          color: "success" 
+        })
+      } catch (error) {
+        console.error("启动游戏失败:", error)
+        addToast({ 
+          title: `启动失败: ${error instanceof Error ? error.message : String(error)}`, 
+          color: "danger" 
+        })
+      }
     })
 
     void listen("tray://kill_steam", async () => {
@@ -82,10 +101,13 @@ export default function RootLayout({ children }: { children: React.ReactNode })
     void steam.checkCs2DirValid()
   }, [debounceCs2Dir])
   useEffect(() => {
-    if (debounceSteamDirValid) {
+    if (debounceSteamDirValid && steam.state.steamDir) {
+      // 安全地获取用户列表（内部已有错误处理）
       void steam.getUsers()
-      // 启动文件监听
-      void invoke("start_watch_loginusers", { steamDir: steam.state.steamDir })
+      // 启动文件监听，添加错误处理
+      void invoke("start_watch_loginusers", { steamDir: steam.state.steamDir }).catch((error) => {
+        console.error("启动文件监听失败:", error)
+      })
     }
   }, [debounceSteamDirValid, steam.state.steamDir])