feat(settings): gate notifications page behind OS permission

app/(auth)/(tabs)/(home)/settings/notifications/page.tsx

@@ -1,47 +1,54 @@
+import { Ionicons } from "@expo/vector-icons";
 import * as Notifications from "expo-notifications";
 import { t } from "i18next";
 import { useEffect, useState } from "react";
-import { Linking, ScrollView, Switch } from "react-native";
+import { Linking, ScrollView, Switch, View } from "react-native";
+import { Button } from "@/components/Button";
+import { Text } from "@/components/common/Text";
 import { ListGroup } from "@/components/list/ListGroup";
 import { ListItem } from "@/components/list/ListItem";
 import { useSettings } from "@/utils/atoms/settings";
 
 export default function NotificationsPage() {
   const { settings, updateSettings } = useSettings();
-  const [granted, setGranted] = useState<boolean | null>(null);
+  const [perm, setPerm] =
+    useState<Notifications.NotificationPermissionsStatus | null>(null);
 
   useEffect(() => {
-    Notifications.getPermissionsAsync().then((p) => setGranted(p.granted));
+    Notifications.getPermissionsAsync().then(setPerm);
   }, []);
 
   const requestPermission = async () => {
-    const p = await Notifications.requestPermissionsAsync();
-    setGranted(p.granted);
-    if (!p.granted) Linking.openSettings();
+    const res = await Notifications.requestPermissionsAsync();
+    setPerm(res);
+    // Only bounce to system settings when the OS will not prompt again.
+    if (!res.granted && res.canAskAgain === false) {
+      Linking.openSettings();
+    }
   };
 
-  if (!settings) return null;
+  if (!settings || perm === null) return null;
+
+  if (!perm.granted) {
+    return (
+      <View className='flex-1 items-center justify-center px-8'>
+        <Ionicons name='notifications-off-outline' size={56} color='#5A5960' />
+        <Text className='text-white text-lg font-semibold mt-4 text-center'>
+          {t("home.settings.notifications.disabled_title")}
+        </Text>
+        <Text className='text-[#9899A1] text-center mt-2'>
+          {t("home.settings.notifications.disabled_description")}
+        </Text>
+        <Button color='purple' className='mt-6' onPress={requestPermission}>
+          {t("home.settings.notifications.enable_button")}
+        </Button>
+      </View>
+    );
+  }
 
   return (
     <ScrollView contentContainerStyle={{ padding: 16 }}>
-      <ListGroup title={t("home.settings.notifications.permission_title")}>
-        <ListItem
-          title={t("home.settings.notifications.system_permission")}
-          value={
-            granted == null
-              ? "…"
-              : granted
-                ? t("home.settings.notifications.granted")
-                : t("home.settings.notifications.denied")
-          }
-          textColor={granted ? "default" : "blue"}
-          onPress={granted ? undefined : requestPermission}
-        />
-      </ListGroup>
-      <ListGroup
-        title={t("home.settings.notifications.events_title")}
-        className='mt-4'
-      >
+      <ListGroup title={t("home.settings.notifications.events_title")}>
         <ListItem title={t("home.settings.notifications.master")}>
           <Switch
             value={settings.notificationsEnabled}