feat(home): localize greetings and address profile names

test/home_greeting_test.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:spotiflac_android/l10n/app_localizations.dart';
+import 'package:spotiflac_android/utils/home_greeting.dart';
+
+void main() {
+  late AppLocalizations l10n;
+
+  setUpAll(() async {
+    l10n = await AppLocalizations.delegate.load(const Locale('en'));
+  });
+
+  String at(int hour, {String name = '', int variant = 0}) => homeGreeting(
+    l10n,
+    name: name,
+    now: DateTime(2026, 10, 18, hour),
+    variant: variant,
+  );
+
+  test('follows the time of day', () {
+    expect(at(8), 'Good morning');
+    expect(at(13), 'Good afternoon');
+    expect(at(18), 'Good evening');
+    expect(at(23), 'Good night');
+    expect(at(3), 'Good night');
+  });
+
+  test('variants rotate within the same part of the day', () {
+    final phrases = {for (var i = 0; i < 3; i++) at(8, variant: i)};
+    expect(phrases, {'Good morning', 'Rise and shine', 'Fresh start'});
+    expect(at(8, variant: 3), at(8));
+  });
+
+  test('addresses the profile by first name only', () {
+    expect(at(23, name: '  Alex Rivera '), 'Good night, Alex');
+    expect(at(23, name: '   '), 'Good night');
+  });
+}