Fix vertical overflow by removing nested Scaffold architecture

- Remove nested Scaffold from ScoringPage (now uses LayoutBuilder)
- Use proper constraint-based height calculation instead of MediaQuery
- Maintain score preservation across navigation without nested scaffolds
- Fix viewport architecture to work within MainNavigationPage body
- Minor keypad layout adjustment (77%/23% flex ratio)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

tools/test_detection.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+"""
+Test script to verify Flutter app configuration detection.
+"""
+
+from flutter_rename import FlutterRenamer
+
+def main():
+    print("Testing Flutter app configuration detection...")
+    print("=" * 60)
+    
+    renamer = FlutterRenamer()
+    config = renamer.detect_current_configuration()
+    
+    print("Detected configuration:")
+    for key, value in config.items():
+        formatted_key = key.replace('_', ' ').title()
+        print(f"  {formatted_key:20}: {value}")
+    
+    print("\nValidation tests:")
+    
+    # Test package name validation
+    test_packages = ['archery_scorecard', 'my-app', 'MyApp', 'archery__scorecard', '_archery', 'archery_', 'class']
+    for pkg in test_packages:
+        valid, msg = renamer.validate_package_name(pkg)
+        status = "✓" if valid else "✗"
+        print(f"  {status} '{pkg}': {msg}")
+    
+    # Test app name validation
+    test_names = ['Archery Scorecard', '', 'A', 'A' * 60]
+    for name in test_names:
+        valid, msg = renamer.validate_app_name(name)
+        status = "✓" if valid else "✗"
+        print(f"  {status} '{name}': {msg}")
+    
+    # Test class name generation
+    test_app_names = ['Archery Scorecard', 'My App!', 'Score-Keeper Pro', 'Simple']
+    print("\nClass name generation:")
+    for name in test_app_names:
+        class_name = renamer.generate_class_name(name)
+        print(f"  '{name}' → '{class_name}'")
+    
+    # Test Android package ID generation
+    test_packages = ['archery_scorecard', 'my_app', 'simple_app']
+    print("\nAndroid package ID generation:")
+    for pkg in test_packages:
+        android_pkg = renamer.generate_android_package_id(pkg)
+        print(f"  '{pkg}' → '{android_pkg}'")
+
+if __name__ == "__main__":
+    main()