OpenShulker

- Crash Auto‑Rollback Before a shulker box is opened, its original contents are atomically persisted to disk (JSON). If the server crashes, the contents are automatically restored on next startup or player join – guaranteeing that items are never duplicated or lost. If the atomic flush fails before opening, the open operation is rejected, ensuring a strong safety boundary. --- Removals (Simplifications) - Removed the redundant protection against “dragging a shulker box with the mouse into inventory” – this was duplicative with slot lock and incorrectly blocked legitimate actions. - Removed death‑drop recovery. The logic is now simpler: on death, only the editing state is discarded; items themselves are not lost, so no special recovery is needed. --- Retained Features (All Vanilla‑Style Convenience) - Double‑click to collect all items of a type - Drag‑to‑distribute items - Shift‑click quick moves - Number keys and scroll wheel support - Slot locking - Stack rejection (prevent unwanted stacking) - Save on exit / close - onDisable protection