feat(alarmas): replace one-line reliability button with full diagnostics screen

Surface all six DiagnosticoAlarmasAndroid fields instead of three: the
battery-optimization exemption and native pending-alarm count were
already collected but silently dropped by the old widget. Each failing
signal now offers a "Fix this" action that opens the right system
settings screen (exact alarms, notifications, full-screen intent,
battery optimization), guarded by SDK level and never crashing when a
ROM lacks that screen. Manufacturers known for aggressive background
killing (Xiaomi/Redmi/POCO, Huawei, Oppo, Vivo, OnePlus, Samsung) get
an honest explanation that Autostart must be enabled manually, since
there is no API to detect or grant it.

Notifications now deep-links straight to
ACTION_APP_NOTIFICATION_SETTINGS via a new openNotificationSettings
native method, instead of reusing the runtime permission popup meant
for first-time alarm creation.

New copy is added to all 13 ARB locales with real per-language
translations (not Spanish copies), verified by the ARB parity and
anti-copy tests plus the corruption scanner.

lib/l10n/gen/app_localizations_id.dart

@@ -1702,4 +1702,74 @@ class AppLocalizationsId extends AppLocalizations {
 
   @override
   String get alarmCardVacationPausedBadge => 'Dijeda karena liburan';
+
+  @override
+  String get alarmDiagnosticsExactAlarmsTitle => 'Penjadwalan alarm presisi';
+
+  @override
+  String get alarmDiagnosticsExactAlarmsHint =>
+      'Membuat alarm berbunyi tepat pada menit yang kamu atur, meski ponsel dalam mode tidur.';
+
+  @override
+  String get alarmDiagnosticsNotificationsTitle => 'Notifikasi';
+
+  @override
+  String get alarmDiagnosticsNotificationsHint =>
+      'Diperlukan untuk menampilkan alarm dan pemberitahuan dini.';
+
+  @override
+  String get alarmDiagnosticsFullScreenTitle => 'Tampilan alarm layar penuh';
+
+  @override
+  String get alarmDiagnosticsFullScreenHint =>
+      'Membuat layar alarm muncul otomatis, meski ponsel terkunci.';
+
+  @override
+  String get alarmDiagnosticsBatteryTitle => 'Optimisasi baterai';
+
+  @override
+  String get alarmDiagnosticsBatteryHint =>
+      'Mencegah sistem menutup PluriWave di latar belakang, sehingga alarm tetap bisa berbunyi.';
+
+  @override
+  String get alarmDiagnosticsNativeCountTitle =>
+      'Alarm yang terdaftar di Android';
+
+  @override
+  String alarmDiagnosticsNativeCountValue(int count) {
+    return 'Terdaftar saat ini: $count';
+  }
+
+  @override
+  String get alarmDiagnosticsNativeCountAttentionHint =>
+      'Kamu punya alarm yang aktif, tapi belum ada yang terdaftar di sistem. Buka lagi PluriWave, atau perbaiki dulu poin-poin di atas.';
+
+  @override
+  String get alarmDiagnosticsManufacturerLabel => 'Produsen';
+
+  @override
+  String get alarmDiagnosticsSdkLabel => 'Versi Android (SDK)';
+
+  @override
+  String get alarmDiagnosticsNeedsAttentionStatus => 'Perlu perhatian';
+
+  @override
+  String get alarmDiagnosticsAutostartTitle =>
+      'Satu langkah manual lagi di ponsel ini';
+
+  @override
+  String alarmDiagnosticsAutostartBody(String manufacturer) {
+    return 'Ponsel $manufacturer sering menutup aplikasi yang berjalan di latar belakang untuk menghemat baterai. Tidak ada pengaturan yang bisa diaktifkan PluriWave sendiri — kamu perlu mengaktifkan sendiri Autostart (kadang disebut \"Mulai otomatis\" atau \"Aktivitas latar belakang\") untuk PluriWave. Cari di Pengaturan, di bagian Aplikasi atau Baterai, atau di aplikasi Keamanan bawaan ponsel.';
+  }
+
+  @override
+  String get alarmDiagnosticsFixAction => 'Perbaiki';
+
+  @override
+  String get alarmDiagnosticsIntentUnavailable =>
+      'Tidak bisa membuka layar pengaturan itu di ponsel ini. Coba cari secara manual di Pengaturan.';
+
+  @override
+  String get alarmDiagnosticsUnavailableHint =>
+      'Kami belum bisa memeriksa pengaturan alarmmu.';
 }