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_improvements.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""
+Test script for improved Flutter rename script functionality.
+"""
+
+from flutter_rename import FlutterRenamer
+
+def test_no_changes_detection():
+    """Test that the script correctly detects when no changes are needed."""
+    print("Testing no-changes detection...")
+    
+    renamer = FlutterRenamer()
+    config = renamer.detect_current_configuration()
+    
+    # Test with current values
+    if config.get('package_name') and config.get('app_title'):
+        package_name = config.get('package_name')
+        app_name = config.get('app_title')
+        class_name = renamer.generate_class_name(app_name)
+        android_package_id = renamer.generate_android_package_id(package_name)
+        
+        # Check if no-changes detection logic works
+        no_changes = (
+            package_name == config.get('package_name', '') and
+            app_name == config.get('app_title', '') and
+            class_name == config.get('main_class', '') and
+            android_package_id == config.get('android_namespace', '')
+        )
+        
+        print(f"Current package name: {config.get('package_name')}")
+        print(f"Current app title: {config.get('app_title')}")
+        print(f"Current class name: {config.get('main_class')}")
+        print(f"Current Android namespace: {config.get('android_namespace')}")
+        print()
+        print(f"Generated class name: {class_name}")
+        print(f"Generated Android package: {android_package_id}")
+        print()
+        print(f"No changes detected: {no_changes}")
+        
+        if not no_changes:
+            print("Differences found:")
+            if class_name != config.get('main_class', ''):
+                print(f"  Class name: {config.get('main_class')} → {class_name}")
+            if android_package_id != config.get('android_namespace', ''):
+                print(f"  Android package: {config.get('android_namespace')} → {android_package_id}")
+    else:
+        print("Configuration not fully detected, cannot test no-changes logic")
+
+def test_current_config_display():
+    """Test current configuration detection."""
+    print("\n" + "="*60)
+    print("TESTING CURRENT CONFIGURATION DETECTION")
+    print("="*60)
+    
+    renamer = FlutterRenamer()
+    config = renamer.detect_current_configuration()
+    renamer.display_current_config()
+
+if __name__ == "__main__":
+    test_current_config_display()
+    print()
+    test_no_changes_detection()