Fixes for appimage installs

TodoApp/Resources/AppIcon/appicon.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="456" height="456" viewBox="0 0 456 456" xmlns="http://www.w3.org/2000/svg">
+  <rect width="456" height="456" fill="#0F839E"/>
+</svg>

TodoApp/Resources/AppIcon/appicon_combined.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="256" height="256" viewBox="0 0 256 256" xmlns="http://www.w3.org/2000/svg">
+  <rect width="256" height="256" rx="48" fill="#0F839E"/>
+  <g transform="translate(48, 48) scale(6.67)">
+    <path fill="white" d="M22 5.18L10.59 16.6l-4.24-4.24-1.41 1.41 5.66 5.66 12.83-12.83L22 5.18zM12 20c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8m0-18C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2z"/>
+  </g>
+</svg>

TodoApp/Resources/AppIcon/appiconfg.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="456" height="456" viewBox="0 0 456 456" xmlns="http://www.w3.org/2000/svg">
+  <!-- Task/Check circle icon (Material Icons) -->
+  <g transform="translate(88, 88) scale(11.67)">
+    <path fill="#000000" d="M22 5.18L10.59 16.6l-4.24-4.24-1.41 1.41 5.66 5.66 12.83-12.83L22 5.18zM12 20c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8m0-18C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2z"/>
+  </g>
+</svg>

TodoApp/TodoApp.csproj

@@ -38,6 +38,11 @@
     <MauiXaml Update="**/*.xaml" />
   </ItemGroup>
 
+  <!-- App Icon -->
+  <ItemGroup>
+    <MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#FFFFFF" BackgroundColor="#0F839E" />
+  </ItemGroup>
+
   <!-- Images -->
   <ItemGroup>
     <MauiImage Include="Resources\Images\*.svg" />