Initial commit: Flutter app + PHP/MySQL backend on Hostinger

Replaces Firebase with a self-hosted PHP/MySQL API served from
winded.prymsolutions.com. Includes full backend (schema, auth, events,
teams, brackets, suggestions, stats, media, file upload) and updated
Flutter repositories and domain models.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/main.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import 'core/router/app_router.dart';
+import 'core/theme/app_theme.dart';
+
+void main() {
+  WidgetsFlutterBinding.ensureInitialized();
+  runApp(const ProviderScope(child: WindedApp()));
+}
+
+class WindedApp extends ConsumerWidget {
+  const WindedApp({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final router = ref.watch(appRouterProvider);
+    return MaterialApp.router(
+      title: 'Winded',
+      theme: AppTheme.light,
+      darkTheme: AppTheme.dark,
+      themeMode: ThemeMode.dark,
+      routerConfig: router,
+    );
+  }
+}