Android: fix app hanging on the loading screen (Node start only returns when Node exits, wait for whenReady instead), build the native bridge with 16 KB page alignment, show an error instead of an endless spinner

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

mobile/dev/electron-dev.js

@@ -26,8 +26,10 @@ ipcMain.on('dev:send', (_e, name, args) => fromWeb.emit(name, ...args));
 ipcMain.handle('dev:start', (_e, env) => {
   Object.assign(process.env, env, { DATADIR: bridge.getDataPath() });
   require('fs').mkdirSync(process.env.DATADIR, { recursive: true });
-  require(path.join(WWW, 'nodejs', 'index.js'));
+  setTimeout(() => { started = true; require(path.join(WWW, 'nodejs', 'index.js')); }, 500);
 });
+let started;
+ipcMain.handle('dev:ready', async () => { while (!started) await new Promise((r) => setTimeout(r, 100)); });
 ipcMain.handle('dev:native', (_e, method, arg) => {
   if (method === 'vaultKey') return { key: crypto.createHash('sha256').update(app.getPath('userData')).digest('base64') };
   if (method === 'info') return { device: 'Dev Phone', locale: process.env.MRTERM_DEV_LOCALE || 'en-US', version: require('../../package.json').version };

mobile/dev/preload.js

@@ -6,7 +6,9 @@ const native = (m) => (arg) => ipcRenderer.invoke('dev:native', m, arg);
 
 contextBridge.exposeInMainWorld('DevBridge', {
   NodeJS: {
-    start: (o) => ipcRenderer.invoke('dev:start', o.env),
+    // Wie auf Android: start() kehrt erst zurück, wenn Node beendet wird
+    start: (o) => { ipcRenderer.invoke('dev:start', o.env); return new Promise(() => {}); },
+    whenReady: () => ipcRenderer.invoke('dev:ready'),
     send: ({ eventName, args }) => ipcRenderer.send('dev:send', eventName, args),
     addListener: (name, fn) => { if (!listeners.has(name)) listeners.set(name, new Set()); listeners.get(name).add(fn); return { remove: () => listeners.get(name).delete(fn) }; },
   },