feat: scaffold offline-first mobile app (RN+Expo, expo-sqlite)

Capa API tipada de los 8 endpoints, BD local espejo del bundle + outbox
(operaciones y media) + cursor de sync, motor runSync (PUSH /sync ->
PUSH /media -> PULL bundle?since) con idempotencia por uuid y last-write-wins,
mutaciones de alto nivel (write local + encolar), sesion con token en
SecureStore, conectividad NetInfo y UI minima (Login -> Proyectos -> Detalle).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

App.tsx

@@ -1,20 +1,22 @@
 import { StatusBar } from 'expo-status-bar';
-import { StyleSheet, Text, View } from 'react-native';
+import React, { useEffect } from 'react';
+import { SafeAreaProvider } from 'react-native-safe-area-context';
+import { SessionProvider } from './src/auth/session';
+import { getDb } from './src/db/database';
+import { RootNavigator } from './src/navigation';
 
 export default function App() {
+  // Abre y migra la BD local al arrancar.
+  useEffect(() => {
+    void getDb();
+  }, []);
+
   return (
-    <View style={styles.container}>
-      <Text>Open up App.tsx to start working on your app!</Text>
-      <StatusBar style="auto" />
-    </View>
+    <SafeAreaProvider>
+      <SessionProvider>
+        <RootNavigator />
+        <StatusBar style="light" />
+      </SessionProvider>
+    </SafeAreaProvider>
   );
 }
-
-const styles = StyleSheet.create({
-  container: {
-    flex: 1,
-    backgroundColor: '#fff',
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-});