Fix notification toggle disabled on Android: treat native platform as always supported

The settings page checked for the browser Notification API to determine
support, but Android WebView doesn't expose that API. The Java foreground
service handles notifications natively, so the check was wrong — it showed
'not supported' and disabled the toggle on every APK install.

src/pages/NotificationSettings.tsx

@@ -1,4 +1,5 @@
 import { useState, useEffect } from 'react';
+import { Capacitor } from '@capacitor/core';
 import { useSeoMeta } from '@unhead/react';
 import { ArrowLeft, Bell, BellOff, AlertTriangle } from 'lucide-react';
 import { Link, Navigate } from 'react-router-dom';
@@ -31,7 +32,7 @@ export function NotificationSettings() {
   const pushEnabled = settings?.notificationsEnabled ?? false;
 
   const handleTogglePush = async (enabled: boolean) => {
-    if (enabled) {
+    if (enabled && !Capacitor.isNativePlatform()) {
       if (!('Notification' in window)) return;
 
       // Request browser permission first (no-op if already granted/denied)
@@ -50,8 +51,11 @@ export function NotificationSettings() {
     return <Navigate to="/settings" replace />;
   }
 
-  const isSupported = 'Notification' in window;
-  const isDenied = permission === 'denied';
+  // Native platforms use the Java foreground service for notifications,
+  // not the browser Notification API — always supported.
+  const isNative = Capacitor.isNativePlatform();
+  const isSupported = isNative || 'Notification' in window;
+  const isDenied = !isNative && permission === 'denied';
 
   return (
     <main className="min-h-screen">