New Tauri commands: - create_getting_started_vault: creates sample vault with 11 files (4 types, 4 notes, 1 project, 1 person, 1 topic) - check_vault_exists: validates if a vault path exists on disk - get_default_vault_path: returns ~/Documents/Laputa Sample notes demonstrate editor formatting, properties, wiki-links, and relationships — covering all key Laputa features. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>