fix(install): remove stale OpenClaw extension dir before reinstall

openclaw plugins install fails with "plugin already exists" on upgrades.
Clean up ~/.openclaw/extensions/workit before re-registering.

Author: automagik-genie

install.sh

@@ -348,6 +348,8 @@ ok "Codex skills linked: ~/.agents/skills/workit"
 # OpenClaw integration (optional)
 # ---------------------------------------------------------------------------
 if command -v openclaw > /dev/null 2>&1; then
+    # Remove stale install before re-registering
+    rm -rf "${HOME}/.openclaw/extensions/workit" 2>/dev/null
     if openclaw plugins install "$PLUGIN_DIR/" 2>/dev/null; then
         ok "OpenClaw plugin registered"
     else