feat(mobile): 将安卓显示名改为金讯达并替换正式图标

桌面/最近任务/系统信息统一为金讯达，按正式 PNG 生成各密度与自适应图标，版本提升到 1.0.8+9。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

mobile/lib/main.dart

@@ -47,7 +47,7 @@ class _ChanglianAppState extends State<ChanglianApp> {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: '畅联',
+      title: '金讯达',
       navigatorKey: navigatorKey,
       theme: buildAppTheme(),
       debugShowCheckedModeBanner: false,