feat: initialize Flutter project with version management

- Initialize Flutter 3.38 project with all platforms
- Add build-time version generation from pubspec.yaml
- Print version to console on app startup
- Create CHANGELOG.md following Keep a Changelog format
- Update .gitignore for Flutter + generated files
- Basic app scaffold with Material 3 theming

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tool/generate_version.dart

@@ -0,0 +1,50 @@
+#!/usr/bin/env dart
+/// Generates lib/version.g.dart from pubspec.yaml
+///
+/// Run before building: `dart run tool/generate_version.dart`
+
+import 'dart:io';
+
+import 'package:yaml/yaml.dart';
+
+void main() {
+  final pubspecFile = File('pubspec.yaml');
+  if (!pubspecFile.existsSync()) {
+    stderr.writeln('Error: pubspec.yaml not found');
+    exit(1);
+  }
+
+  final pubspec = loadYaml(pubspecFile.readAsStringSync()) as YamlMap;
+
+  final name = pubspec['name'] as String;
+  final description = pubspec['description'] as String;
+  final versionString = pubspec['version'] as String;
+
+  // Parse version: "0.1.0+1" -> version="0.1.0", buildNumber=1
+  final versionParts = versionString.split('+');
+  final version = versionParts[0];
+  final buildNumber = versionParts.length > 1 ? int.parse(versionParts[1]) : 0;
+
+  final output = '''
+// GENERATED FILE - DO NOT EDIT
+// Generated by: dart run tool/generate_version.dart
+
+/// Application version information from pubspec.yaml
+class AppVersion {
+  AppVersion._();
+
+  static const String name = '$name';
+  static const String description = '$description';
+  static const String version = '$version';
+  static const int buildNumber = $buildNumber;
+  static const String fullVersion = '$version+$buildNumber';
+}
+''';
+
+  final outputFile = File('lib/version.g.dart');
+  outputFile.writeAsStringSync(output);
+
+  print('Generated lib/version.g.dart');
+  print('  name: $name');
+  print('  version: $version+$buildNumber');
+}