xdph: end share when the shared window closes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

settings/hyprland.nix

@@ -11,6 +11,11 @@ in
     programs.hyprland = {
       enable = true;
       xwayland.enable = true;
+      # Closing a window that's being shared ends the share (Discord stops the
+      # stream) instead of streaming its last frame forever.
+      portalPackage = pkgs.xdg-desktop-portal-hyprland.overrideAttrs (old: {
+        patches = (old.patches or [ ]) ++ [ ../patches/xdph-close-session-on-window-close.patch ];
+      });
     };
 
     # Let Hyprland show the session menu for a short power-key press instead