feat: adopt bug logo and scale onboarding header with screen width

lib/presentation/screens/onboarding_screen.dart

@@ -192,20 +192,26 @@ class _OnboardingScreenState extends ConsumerState<OnboardingScreen> {
     );
   }
 
-  Widget _header(BuildContext context, String title) => Column(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: [
-          const SizedBox(height: 60),
-          Row(
+  Widget _header(BuildContext context, String title) => LayoutBuilder(
+        builder: (context, constraints) {
+          final logoWidth =
+              (constraints.maxWidth * 0.5).clamp(48.0, 200.0).toDouble();
+          return Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
             children: [
-              const Image(image: AssetImage("assets/images/logo-small.png")),
-              const SizedBox(width: 10),
-              Text("kirakira", style: Theme.of(context).textTheme.titleLarge),
+              SizedBox(
+                width: logoWidth,
+                child: const Image(
+                    image: AssetImage("assets/images/bug_logo.png"),
+                    fit: BoxFit.contain),
+              ),
+              Text("kirakira",
+                  style: Theme.of(context).textTheme.titleLarge),
+              const SizedBox(height: 40),
+              Text(title, style: Theme.of(context).textTheme.titleMedium),
             ],
-          ),
-          const SizedBox(height: 40),
-          Text(title, style: Theme.of(context).textTheme.titleMedium),
-        ],
+          );
+        },
       );
 
   Widget _welcome(BuildContext context) {

pubspec.yaml

@@ -34,8 +34,8 @@ flutter_launcher_icons:
   android: "launcher_icon"
   ios: false
   min_sdk_android: 20
-  image_path: assets/images/icon.png
-  adaptive_icon_foreground: assets/images/icon.png
+  image_path: assets/images/bug_logo.png
+  adaptive_icon_foreground: assets/images/bug_logo.png
   adaptive_icon_background: "#01111d"
 
 flutter_native_splash:
@@ -50,7 +50,7 @@ flutter_native_splash:
 flutter:
   uses-material-design: true
   assets:
-    - assets/images/logo-small.png
+    - assets/images/bug_logo.png
     - assets/images/empty.png
     - assets/images/error.png
     - assets/images/avatar.png