fix: mount PVC at /config to persist Chrome and app state across restarts

The jlesage/baseimage-gui sets XDG_CONFIG_HOME=/config/xdg/config at
runtime, so Chrome was writing its profile to /config/xdg/config/google-chrome
which lived on ephemeral storage. This caused Chrome to open as a fresh
install on every pod restart.

Changes:
- Mount the PVC at /config instead of /home (aligns with baseimage-gui convention)
- Move user home directory to /config/userdata (on the PVC)
- Add explicit --user-data-dir for Chrome pointing to PVC path
- Clean up Chrome crash lock files and patch Preferences on startup
  to prevent session/cookie loss after unclean pod shutdown
- Update all scripts (sshd, init-repo, cont-init) to use new paths
- Remove unnecessary cont-init-home.sh

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

scripts/cont-init-sshd.sh

@@ -5,7 +5,7 @@
 
 echo "=== SSH enabled: starting sshd ==="
 
-HOME_DIR="/home/user"
+HOME_DIR="/config/userdata"
 HOST_KEY_STORE="$HOME_DIR/.ssh/host_keys"
 
 # Persist host keys on the home PVC so clients don't see a "host key