fix: 全屏按钮增加横屏锁定

点击全屏按钮后：进入浏览器全屏 + 锁定横屏方向
退出全屏时：解除横屏锁定

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/mileage/MonitoringView.tsx

@@ -214,16 +214,20 @@ export default function MonitoringView() {
 
   const filteredVehicles = vehicles;
 
-  const toggleFullscreen = () => {
+  const toggleFullscreen = async () => {
     if (!isFullscreen) {
-      const elem = document.documentElement;
-      if (elem.requestFullscreen) {
-        elem.requestFullscreen().catch(() => {});
-      }
+      try {
+        const elem = document.documentElement;
+        if (elem.requestFullscreen) await elem.requestFullscreen();
+        // 尝试锁定横屏
+        try { await (screen.orientation as any).lock('landscape'); } catch {}
+      } catch {}
     } else {
-      if (document.exitFullscreen) {
-        document.exitFullscreen().catch(() => {});
-      }
+      try {
+        // 解除横屏锁定
+        try { (screen.orientation as any).unlock(); } catch {}
+        if (document.exitFullscreen) await document.exitFullscreen();
+      } catch {}
     }
     setIsFullscreen(!isFullscreen);
   };