fix: async SecureStore token read + prod env fallback

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/env/src/native.ts

@@ -6,6 +6,8 @@ export const env = createEnv({
   client: {
     EXPO_PUBLIC_SERVER_URL: z.url(),
   },
-  runtimeEnv: process.env,
+  runtimeEnv: {
+    EXPO_PUBLIC_SERVER_URL: process.env.EXPO_PUBLIC_SERVER_URL ?? "https://api.app-forge.dev",
+  },
   emptyStringAsUndefined: true,
 });