feat: full app integration — all screens wired and working

mobile/App.tsx

@@ -3,10 +3,46 @@ import { NavigationContainer, DarkTheme } from '@react-navigation/native';
 import { GestureHandlerRootView } from 'react-native-gesture-handler';
 import { StatusBar } from 'expo-status-bar';
 import { SafeAreaProvider } from 'react-native-safe-area-context';
+import { apiService } from '@/services/api.service';
+import { rssiService } from '@/services/rssi.service';
+import { wsService } from '@/services/ws.service';
 import { ThemeProvider } from './src/theme/ThemeContext';
+import { usePoseStore } from './src/stores/poseStore';
+import { useSettingsStore } from './src/stores/settingsStore';
 import { RootNavigator } from './src/navigation/RootNavigator';
 
 export default function App() {
+  const serverUrl = useSettingsStore((state) => state.serverUrl);
+  const rssiScanEnabled = useSettingsStore((state) => state.rssiScanEnabled);
+
+  useEffect(() => {
+    apiService.setBaseUrl(serverUrl);
+    const unsubscribe = wsService.subscribe(usePoseStore.getState().handleFrame);
+    wsService.connect(serverUrl);
+
+    return () => {
+      unsubscribe();
+      wsService.disconnect();
+    };
+  }, [serverUrl]);
+
+  useEffect(() => {
+    if (!rssiScanEnabled) {
+      rssiService.stopScanning();
+      return;
+    }
+
+    const unsubscribe = rssiService.subscribe(() => {
+      // Consumers can subscribe elsewhere for RSSI events.
+    });
+    rssiService.startScanning(2000);
+
+    return () => {
+      unsubscribe();
+      rssiService.stopScanning();
+    };
+  }, [rssiScanEnabled]);
+
   useEffect(() => {
     (globalThis as { __appStartTime?: number }).__appStartTime = Date.now();
   }, []);