chore: update gitignore

.gitignore

@@ -8,18 +8,7 @@ dist/
 # hai runtime (local board state — don't commit)
 .kb/
 .hai/
-
-# Taskplane runtime artifacts
-.pi/batch-state.json
-.pi/batch-history.json
-.pi/lane-state-*
-.pi/merge-result-*
-.pi/merge-request-*
-.pi/worker-conversation-*
-.pi/orch-logs/
-.pi/orch-abort-signal
-.pi/settings.json
 .worktrees/
 
-# Pi project-local packages
-.pi/npm/
+# Pi
+.pi/