zMenu

New Features

• Fallback inventories for dialogs on older clients: dialogs can now define a fallback-inventory (name, optional plugin, and optional page). When a player's client is below Minecraft 1.21.6 and cannot render dialogs, zMenu opens the configured chest inventory instead, or sends a dedicated message when no fallback is available. Client versions are detected through ViaVersion, ProtocolSupport, or Paper's handshake protocol.
• Client version API: added ClientVersionManager, ClientVersionProvider, and protocol-to-Minecraft version mapping to the public API, allowing integrations to query a player's real client version and register additional providers.
• Placeholder-aware take_item amounts: the amount field of the take_item / take-item action now accepts placeholders and is resolved for the player when the action runs. It still defaults to 1.
• UUID targets in placeholder requirements: target-player can now resolve to either a player name or a UUID when evaluating a placeholder requirement for another player.

Improvements

• Updated zItems support: migrated the material loader to the latest zItems registry API. zItems is now loaded after zMenu to avoid Paper dependency cycles, while older incompatible zItems APIs fail gracefully instead of breaking inventory loading.
• Dialog management hardening: dialog registries and active-dialog tracking are now thread-safe, the API returns the actual loaded dialog names, and dialog names are removed correctly during reloads.
• Error reporting: exceptions are now routed through the zMenu logger with the plugin prefix and complete cause chain instead of being printed directly to standard error.

Fixes

• Fixed active dialog data not being cleared when a player disconnects, which could leak entries and restore a stale dialog after reconnecting.
• Fixed plugin shutdown throwing an additional NullPointerException when startup failed before the website manager was initialized.
• Fixed Minecraft version parsing accepting later numeric fragments after a non-numeric version segment.

Internal Changes

• Added anonymous usage metrics through FastStats, with proper startup and shutdown lifecycle handling.