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/features/auth/application/auth_notifier.dart

@@ -0,0 +1,87 @@
+import 'dart:async';
+
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+import '../../../core/api/api_client.dart';
+import '../domain/app_user.dart';
+import '../infrastructure/auth_repository.dart';
+
+part 'auth_notifier.g.dart';
+
+@Riverpod(keepAlive: true)
+class AuthNotifier extends _$AuthNotifier {
+  @override
+  Future<AppUser?> build() async {
+    final repo = ref.watch(authRepositoryProvider);
+
+    final completer = Completer<AppUser?>();
+    final sub = repo.authStateChanges().listen(
+      (user) {
+        if (!completer.isCompleted) {
+          completer.complete(user);
+        } else {
+          state = AsyncData(user);
+        }
+      },
+      onError: (Object error, StackTrace stack) {
+        if (!completer.isCompleted) {
+          completer.completeError(error, stack);
+        } else {
+          state = AsyncError(error, stack);
+        }
+      },
+    );
+
+    ref.onDispose(sub.cancel);
+    return completer.future;
+  }
+
+  Future<void> signIn({
+    required String email,
+    required String password,
+  }) async {
+    final repo = ref.read(authRepositoryProvider);
+    state = const AsyncLoading();
+    state = await AsyncValue.guard(
+      () => repo.signInWithEmail(email: email, password: password),
+    );
+  }
+
+  Future<void> register({
+    required String email,
+    required String password,
+    required String displayName,
+  }) async {
+    final repo = ref.read(authRepositoryProvider);
+    state = const AsyncLoading();
+    state = await AsyncValue.guard(
+      () => repo.registerWithEmail(
+        email: email,
+        password: password,
+        displayName: displayName,
+      ),
+    );
+  }
+
+  Future<void> signOut() async {
+    final repo = ref.read(authRepositoryProvider);
+    state = const AsyncLoading();
+    state = await AsyncValue.guard(() async {
+      await repo.signOut();
+      return null;
+    });
+  }
+}
+
+/// Maps an [ApiException] or generic error to a friendly message.
+String authErrorMessage(Object error) {
+  if (error is ApiException) {
+    final msg = error.message.toLowerCase();
+    if (msg.contains('email already')) return 'An account already exists for that email.';
+    if (msg.contains('invalid email')) return 'That email address looks invalid.';
+    if (msg.contains('password')) return 'Password must be at least 6 characters.';
+    if (msg.contains('invalid email or password')) return 'Incorrect email or password.';
+    return error.message;
+  }
+  return 'Something went wrong. Please try again.';
+}

lib/features/auth/application/auth_notifier.g.dart

@@ -0,0 +1,28 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+// ignore_for_file: type=lint
+// ignore_for_file: subtype_of_sealed_class, invalid_use_of_internal_member, invalid_use_of_visible_for_testing_member, deprecated_member_use_from_same_package
+
+part of 'auth_notifier.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+String _$authNotifierHash() => r'c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4';
+
+/// See also [AuthNotifier].
+@ProviderFor(AuthNotifier)
+final authNotifierProvider =
+    AsyncNotifierProvider<AuthNotifier, AppUser?>.internal(
+  AuthNotifier.new,
+  name: r'authNotifierProvider',
+  debugGetCreateSourceHash:
+      const bool.fromEnvironment('dart.vm.product')
+          ? null
+          : _$authNotifierHash,
+  dependencies: null,
+  allTransitiveDependencies: null,
+);
+
+typedef _$AuthNotifier = AsyncNotifier<AppUser?>;