feat: screenshot app improvement, WIndow Server supports full-screen overlay, Disks app UI improvements

kernel/src/Api/Window.hpp

@@ -2,7 +2,7 @@
     * Window.hpp
     * SYS_WINCREATE, SYS_WINDESTROY, SYS_WINPRESENT, SYS_WINPOLL,
     * SYS_WINENUM, SYS_WINMAP, SYS_WINSENDEVENT, SYS_WINRESIZE,
-    * SYS_WINSETSCALE, SYS_WINGETSCALE syscalls
+    * SYS_WINSETCURSOR, SYS_WINSETFLAGS, SYS_WINSETSCALE, SYS_WINGETSCALE syscalls
     * Copyright (c) 2026 Daniel Hammer
 */
 
@@ -75,6 +75,10 @@ namespace Montauk {
         return WinServer::SetCursor(windowId, Sched::GetCurrentPid(), cursor);
     }
 
+    static int Sys_WinSetFlags(int windowId, uint32_t flags) {
+        return WinServer::SetFlags(windowId, Sched::GetCurrentPid(), flags);
+    }
+
     static int Sys_WinSetScale(int scale) {
         return WinServer::SetScale(scale);
     }