[claude] Mobile: Nostr identity — Amber NIP-55 + nsec fallback (#29) (#108)

Co-authored-by: Claude (Opus 4.6) <claude@hermes.local>
Co-committed-by: Claude (Opus 4.6) <claude@hermes.local>

artifacts/mobile/app/_layout.tsx

@@ -16,6 +16,7 @@ import { SafeAreaProvider } from "react-native-safe-area-context";
 
 import { ErrorBoundary } from "@/components/ErrorBoundary";
 import { TimmyProvider } from "@/context/TimmyContext";
+import { NostrProvider } from "@/context/NostrContext";
 import { ONBOARDING_COMPLETED_KEY } from "@/constants/storage-keys";
 
 SplashScreen.preventAutoHideAsync();
@@ -77,9 +78,11 @@ export default function RootLayout() {
         <QueryClientProvider client={queryClient}>
           <GestureHandlerRootView style={{ flex: 1 }}>
             <KeyboardProvider>
-              <TimmyProvider>
-                <RootLayoutNav />
-              </TimmyProvider>
+              <NostrProvider>
+                <TimmyProvider>
+                  <RootLayoutNav />
+                </TimmyProvider>
+              </NostrProvider>
             </KeyboardProvider>
           </GestureHandlerRootView>
         </QueryClientProvider>