[fix](client): apply the window insets so nothing draws under the system bars

React Native has Flutter's SafeArea under another name: react-native-safe-area-
context. The app mounted SafeAreaProvider but never consumed a single inset, so
on Android 15+ — where targetSdk 36 forces edge-to-edge and the window extends
behind both system bars — the Home header's settings gear sat underneath the
notification bar and could not be tapped.

A single SafeAreaFrame pads the tree by all four insets once, above the
navigator, so every present and future screen inherits the safe area instead of
each one re-deriving it.

App.tsx

@@ -1,8 +1,8 @@
 import React, { useEffect, useRef } from 'react';
-import { StatusBar } from 'react-native';
+import { StatusBar, View } from 'react-native';
 import { GestureHandlerRootView } from 'react-native-gesture-handler';
 import { HeroUINativeProviderRaw } from 'heroui-native/provider-raw';
-import { SafeAreaProvider } from 'react-native-safe-area-context';
+import { SafeAreaProvider, useSafeAreaInsets } from 'react-native-safe-area-context';
 import { DarkTheme, NavigationContainer, useNavigation } from '@react-navigation/native';
 import { createNativeStackNavigator } from '@react-navigation/native-stack';
 import type { NativeStackNavigationProp } from '@react-navigation/native-stack';
@@ -149,12 +149,40 @@ function Root() {
   );
 }
 
+/**
+ * React Native's equivalent of Flutter's `SafeArea`: pad the whole tree by the
+ * platform's window insets once, so no screen can draw its header under the
+ * status bar or its buttons under the navigation bar.
+ *
+ * This is not optional on Android 15+: with `targetSdk 36` the system enforces
+ * edge-to-edge, so the window extends behind both system bars and the app is
+ * responsible for the padding. Without it the Home header's settings gear sat
+ * underneath the notification bar and could not be tapped.
+ */
+function SafeAreaFrame({ children }: { children: React.ReactNode }) {
+  const insets = useSafeAreaInsets();
+  return (
+    <View
+      style={{
+        flex: 1,
+        paddingTop: insets.top,
+        paddingBottom: insets.bottom,
+        paddingLeft: insets.left,
+        paddingRight: insets.right,
+      }}
+    >
+      {children}
+    </View>
+  );
+}
+
 function App() {
   return (
     <GestureHandlerRootView style={{ flex: 1, backgroundColor: bg }}>
       <StatusBar barStyle="light-content" backgroundColor={bg} />
       <HeroUINativeProviderRaw>
         <SafeAreaProvider>
+          <SafeAreaFrame>
             <ThemeProvider>
               <ConnectionProvider>
                 <AuthProvider>
@@ -164,6 +192,7 @@ function App() {
                 </AuthProvider>
               </ConnectionProvider>
             </ThemeProvider>
+          </SafeAreaFrame>
         </SafeAreaProvider>
       </HeroUINativeProviderRaw>
     </GestureHandlerRootView>