Fix GNOME dock icon matching for Sovran Hub on Wayland

- Change StartupWMClass from 'sovran-hub' to 'brave-localhost__-Default' in
  the .desktop file so GNOME Shell matches the window to the correct launcher
- Remove --gtk-application-id and --wayland-app-id flags from hub-brave-wrapper
  since Brave ignores them in --app= mode on Wayland

Agent-Logs-Url: https://github.com/naturallaw777/staging_alpha/sessions/daa85aaf-5b87-448d-8336-d94dc2dfe727

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

modules/core/sovran-hub.nix

@@ -223,13 +223,11 @@ 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 \
-          --wayland-app-id=sovran-hub
+          --ozone-platform=wayland
   '';
 
   # ── Hub auto-launch wrapper script ────────────────────────────────
@@ -304,7 +302,7 @@ Icon=sovran-hub
 Terminal=false
 Categories=System;
 StartupNotify=true
-StartupWMClass=sovran-hub
+StartupWMClass=brave-localhost__-Default
 X-GNOME-SingleWindow=true
 DESKTOP