Add try-catch around RDP script initialization to catch errors

- Wrapped the initial script execution in try-catch
- Added alert for critical errors to show if script fails
- This will help identify if JavaScript syntax errors are preventing execution
- If alert appears, it means script is running but has errors
- If no alert appears, script is completely blocked

wssshd2/templates/rdp.html

@@ -313,7 +313,11 @@ console.log('RDP page script starting...');
 
 // init kbdlayout_input
 let defaultLayoutId;
-for (let i = 0; i < layouts.length; ++i) {
+try {
+    if (typeof layouts === 'undefined') {
+        throw new Error('layouts is not defined - reversed_layouts.js may not have loaded');
+    }
+    for (let i = 0; i < layouts.length; ++i) {
         const layout = layouts[i];
         const displayName = layout.displayName;
         const opt = document.createElement('option');
@@ -324,15 +328,22 @@ for (let i = 0; i < layouts.length; ++i) {
             defaultLayoutId = i;
         }
         // Since we don't have kbdlayout_input in this simplified version, we'll use default
+    }
+    console.log('Keyboard layouts initialized, defaultLayoutId:', defaultLayoutId);
+} catch (error) {
+    console.error('Error initializing keyboard layouts:', error);
+    defaultLayoutId = 0; // fallback
 }
-console.log('Keyboard layouts initialized, defaultLayoutId:', defaultLayoutId);
 
 let kbdInputLayoutEvent = () => {};
 
 let _Module = null;
 
 console.log('Starting WebAssembly module loading...');
-WallixModule({
+if (typeof WallixModule === 'undefined') {
+    console.error('WallixModule is not defined - rdp.wasm.js may not have loaded');
+} else {
+    WallixModule({
     // INITIAL_MEMORY: 16777216, // 16**6
     // INITIAL_MEMORY: 268435456, // 16**7
 }).then((Module) => {