add scroll wheel support to remote desktop

Overlord-Server/public/assets/remotedesktop.js

@@ -1318,6 +1318,14 @@ import { checkFeatureAccess } from "./feature-gate.js";
   canvas.addEventListener("contextmenu", function (e) {
     e.preventDefault();
   });
+  canvas.addEventListener("wheel", function (e) {
+    if (!mouseCtrl.checked) return;
+    const pt = getCanvasPoint(e);
+    if (!pt) return;
+    const delta = Math.max(-120, Math.min(120, Math.round(-e.deltaY)));
+    sendCmd("mouse_wheel", { delta, x: pt.x, y: pt.y });
+    e.preventDefault();
+  }, { passive: false });
 
   canvas.setAttribute("tabindex", "0");
   canvas.addEventListener("click", function () {

Overlord-Server/src/server/ws-console-rd-hvnc.ts

@@ -497,6 +497,13 @@ export function handleRemoteDesktopViewerMessage(ws: ServerWebSocket<SocketData>
       sendDesktopCommandWithId(target, "desktop_mouse_up", { button: Number(payload.button) || 0 }, commandId);
       break;
     }
+    case "mouse_wheel": {
+      if (!state.isStreaming) break;
+      const commandId = uuidv4();
+      recordRdInput(commandId, clientId, "mouse_wheel");
+      sendDesktopCommandWithId(target, "desktop_mouse_wheel", { delta: Number(payload.delta) || 0, x: Number((payload as any).x) || 0, y: Number((payload as any).y) || 0 }, commandId);
+      break;
+    }
     case "key_down": {
       if (!state.isStreaming) break;
       const commandId = uuidv4();