feat(filetree): add filesystem watch support to WebContainer environment and auto-refresh file tree; improve icon handling and context menu behavior

ts_web/elements/dees-contextmenu/dees-contextmenu.ts

@@ -246,7 +246,7 @@ export class DeesContextmenu extends DeesElement {
               @mouseleave=${() => this.handleMenuItemLeave()}
             >
               ${menuItem.iconName ? html`
-                <dees-icon .icon="${`lucide:${menuItem.iconName}`}"></dees-icon>
+                <dees-icon .icon="${menuItem.iconName}"></dees-icon>
               ` : ''}
               <span class="menuitem-text">${menuItem.name}</span>
               ${menuItem.shortcut && !hasSubmenu ? html`
@@ -436,8 +436,9 @@ export class DeesContextmenu extends DeesElement {
     }
 
     // Only destroy window layer if this is not a submenu
+    // Don't await - let cleanup happen in background for instant visual feedback
     if (this.windowLayer && !this.parentMenu) {
-      await this.windowLayer.destroy();
+      this.windowLayer.destroy();
     }
 
     this.style.opacity = '0';