fix: remove dead code and fix D-Bus timeouts in remotedesktop-session

- Delete unused scripts superseded by remotedesktop-session.py:
  - input-bridge.py (standalone input bridge, now integrated)
  - start-remotedesktop-session.sh (shell wrapper, never called)
  - mock-logind.py (logind mock, never used)
  - gnome-screencast-screenshot.sh (superseded by gnome-screenshot.py)

- Fix remotedesktop-session.py:
  - Add 1s socket timeout on client connections for clean shutdown
  - Change D-Bus input event calls from infinite to 1s timeout

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: lukemarsden

Dockerfile.ubuntu-helix

@@ -641,14 +641,11 @@ RUN apt-get update && apt-get install -y python3-gi python3-dbus && rm -rf /var/
 ADD wolf/ubuntu-config/start-zed-helix.sh /usr/local/bin/start-zed-helix.sh
 ADD wolf/ubuntu-config/helix-specs-create.sh /usr/local/bin/helix-specs-create.sh
 ADD wolf/ubuntu-config/start-gnome-bridge.sh /usr/local/bin/start-gnome-bridge.sh
-ADD wolf/ubuntu-config/gnome-screencast-screenshot.sh /usr/local/bin/gnome-screencast-screenshot.sh
 ADD wolf/ubuntu-config/gnome-screenshot.py /usr/local/bin/gnome-screenshot.py
 ADD wolf/ubuntu-config/start-pipewire-screencast.sh /opt/gow/start-pipewire-screencast.sh
-ADD wolf/ubuntu-config/start-remotedesktop-session.sh /opt/gow/start-remotedesktop-session.sh
 ADD wolf/ubuntu-config/remotedesktop-session.py /opt/gow/remotedesktop-session.py
-ADD wolf/ubuntu-config/input-bridge.py /opt/gow/input-bridge.py
 ADD wolf/shared/helix-git-hooks.sh /usr/local/bin/helix-git-hooks.sh
-RUN chmod 755 /usr/local/bin/start-zed-helix.sh /usr/local/bin/helix-specs-create.sh /usr/local/bin/start-gnome-bridge.sh /usr/local/bin/gnome-screencast-screenshot.sh /usr/local/bin/gnome-screenshot.py /usr/local/bin/helix-git-hooks.sh /opt/gow/start-pipewire-screencast.sh /opt/gow/start-remotedesktop-session.sh /opt/gow/remotedesktop-session.py /opt/gow/input-bridge.py
+RUN chmod 755 /usr/local/bin/start-zed-helix.sh /usr/local/bin/helix-specs-create.sh /usr/local/bin/start-gnome-bridge.sh /usr/local/bin/gnome-screenshot.py /usr/local/bin/helix-git-hooks.sh /opt/gow/start-pipewire-screencast.sh /opt/gow/remotedesktop-session.py
 
 # Docker group init script
 ADD wolf/ubuntu-config/16-add-docker-group.sh /etc/cont-init.d/16-add-docker-group.sh