fix(mobile/storage): use valid SecureStore keys

SecureStore only allows alphanumerics, dots, dashes, and
underscores — colons silently throw. Every key in the app
used "qibla:..." and was failing on Android, which is why
Recent mosques, Recent searches, prayer reminders, and the
onboarded flag never persisted. Swap ":" for "." across the
four storage modules.

Author: Aqib-Rime

apps/mobile/features/mosques/lib/recent-places-storage.ts

@@ -1,6 +1,6 @@
 import * as SecureStore from "expo-secure-store";
 
-const KEY = "qibla:recent-place-searches";
+const KEY = "qibla.recent-place-searches";
 const MAX = 10;
 
 export type RecentPlace = {

apps/mobile/features/mosques/lib/recent-storage.ts

@@ -1,6 +1,6 @@
 import * as SecureStore from "expo-secure-store";
 
-const KEY = "qibla:recent-mosques";
+const KEY = "qibla.recent-mosques";
 const MAX = 8;
 
 export async function getRecentMosqueIds(): Promise<string[]> {

apps/mobile/features/onboarding/lib/storage.ts

@@ -1,6 +1,6 @@
 import * as SecureStore from "expo-secure-store";
 
-const KEY = "qibla:onboarded";
+const KEY = "qibla.onboarded";
 
 export async function hasCompletedOnboarding(): Promise<boolean> {
   try {

apps/mobile/features/settings/lib/settings-storage.ts

@@ -1,6 +1,6 @@
 import * as SecureStore from "expo-secure-store";
 
-const PRAYER_REMINDERS_KEY = "qibla:prayer-reminders";
+const PRAYER_REMINDERS_KEY = "qibla.prayer-reminders";
 
 export async function getPrayerRemindersEnabled(): Promise<boolean> {
   try {