feat: enhance Electron app packaging and server preparation

- Added afterPack script in package.json to rebuild native modules for the server bundle.
- Improved icon handling in main.js to support cross-platform formats and verify icon existence.
- Updated startStaticServer function to return a promise for better error handling.
- Introduced a new script, rebuild-server-natives.js, to rebuild native modules based on the target architecture.
- Enhanced prepare-server.js to include native module rebuilding step for improved terminal functionality.

apps/app/scripts/prepare-server.js

@@ -64,4 +64,18 @@ execSync('npm install --omit=dev', {
   }
 });
 
+// Step 6: Rebuild native modules for current architecture
+// This is critical for modules like node-pty that have native bindings
+console.log('🔨 Rebuilding native modules for current architecture...');
+try {
+  execSync('npm rebuild', {
+    cwd: BUNDLE_DIR,
+    stdio: 'inherit'
+  });
+  console.log('✅ Native modules rebuilt successfully');
+} catch (error) {
+  console.warn('⚠️  Warning: Failed to rebuild native modules. Terminal functionality may not work.');
+  console.warn('   Error:', error.message);
+}
+
 console.log('\n✅ Server prepared for bundling at:', BUNDLE_DIR);