feat(branding): 更换应用图标与开屏资源

test/config/brand_identity_test.dart

@@ -14,7 +14,7 @@ const _launchWidth = 390;
 const _launchHeight = 844;
 const _androidRoot = 'android/app/src/main/res';
 const _iosRoot = 'ios/Runner/Assets.xcassets';
-const _red = [245, 48, 59, 255];
+const _ink = [0, 0, 0, 255];
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
@@ -32,9 +32,9 @@ void main() {
     expect(image.width, _iconSize);
     expect(image.height, _iconSize);
     final bytes = await image.toByteData();
-    final pixel = bytes!.buffer.asUint8List().sublist(0, _red.length);
-    for (var channel = 0; channel < _red.length; channel++) {
-      expect(pixel[channel], closeTo(_red[channel], 2));
+    final pixel = bytes!.buffer.asUint8List().sublist(0, _ink.length);
+    for (var channel = 0; channel < _ink.length; channel++) {
+      expect(pixel[channel], closeTo(_ink[channel], 2));
     }
   });
 
@@ -84,7 +84,8 @@ void main() {
       final layers = File(
         '$_androidRoot/drawable$qualifier/launch_background.xml',
       ).readAsStringSync();
-      expect(layers, contains('<gradient'));
+      expect(layers, contains('@color/splash_background'));
+      expect(layers, isNot(contains('<gradient')));
       expect(layers, contains('android:gravity="center"'));
       expect(layers, contains('@drawable/splash_screen'));
     }