feat(GlobalConfig): 添加抖音和美团平台的Logo图片资源在GlobalConfig类中新增了dyLogo和mtLogo两个Image类型的静态常量，用于存储抖音和美团平台的Logo图片资源，并在静态代码块中进行初始化。同时更新了PlatformSelectionView页面中的平台选项图片引用方式，

将原先使用的占位图URL替换为从GlobalConfig加载的实际Logo图片，并相应地修改了createPlatformMtOption与createPlatformDyOption方法签名，
使其接收Image对象而非字符串URL。

src/main/java/com/fantaibao/config/GlobalConfig.java

@@ -57,11 +57,15 @@ public class GlobalConfig {
 
     public static final Image icon16;
     public static final Image icon32;
+    public static final Image dyLogo;
+    public static final Image mtLogo;
 
     static {
         try {
             icon16 = new Image(new FileInputStream(ResourceUtils.getFile("classpath:icon16.png")));
             icon32 = new Image(new FileInputStream(ResourceUtils.getFile("classpath:icon32.png")));
+            dyLogo = new Image(new FileInputStream(ResourceUtils.getFile("classpath:dylogo.png")));
+            mtLogo = new Image(new FileInputStream(ResourceUtils.getFile("classpath:mtlogo.png")));
         } catch (FileNotFoundException e) {
             throw new RuntimeException(e);
         }