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>

chart/templates/deployment.yaml

@@ -68,7 +68,7 @@ spec:
             {{- toYaml .Values.resources | nindent 12 }}
           volumeMounts:
             - name: userhome
-              mountPath: /home
+              mountPath: /config
             - name: workspace
               mountPath: /workspace
             - name: shm

chart/values.yaml

@@ -23,7 +23,7 @@ ssh: false
 # Happy Coder endpoints
 happyServerUrl: "https://happy.farh.net"
 happyWebappUrl: "https://happy-coder.farh.net"
-happyHomeDir: "/home/user/.happy"
+happyHomeDir: "/config/userdata/.happy"
 happyExperimental: "true"
 
 # VNC display