Add --gtk-application-id and --wayland-app-id flags to fix GNOME dock icon on Wayland

Agent-Logs-Url: https://github.com/naturallaw777/staging_alpha/sessions/e02d4ee6-56de-49d6-8852-3368232d8d77

Co-authored-by: naturallaw777 <99053422+naturallaw777@users.noreply.github.com>

modules/core/sovran-hub.nix

@@ -223,11 +223,13 @@ let
     export GIO_LAUNCHED_DESKTOP_FILE="/run/current-system/sw/share/applications/sovran-hub.desktop"
     brave --app=http://localhost:8937 \
           --class=sovran-hub \
+          --gtk-application-id=sovran-hub \
           --user-data-dir="$HUB_DATA" \
           --password-store=basic \
           --disable-gpu \
           --disable-features=WebRtcPipeWireCapturer \
-          --ozone-platform=wayland
+          --ozone-platform=wayland \
+          --wayland-app-id=sovran-hub
   '';
 
   # ── Hub auto-launch wrapper script ────────────────────────────────