Construction Wand Legacy

Backport of Construction Wand features for Minecraft 1.12.2 (Forge).

Implemented Features

Items and Core Modules

- 4 wand types: Stone / Iron / Diamond / Infinity - 2 cores: Angel / Destruction - Core overlay model and tinting (wand appearance changes after installing a core)

Placement and Destruction Logic

- Construction mode - Angel mode: supports mid-air placement - Destruction mode - Uses an interaction flow close to the original implementation: - Placement goes through `ItemBlock.placeBlockAt` - Breaking goes through `removedByPlayer` + `onPlayerDestroy` - Integrated with Forge Place/Break events

Upgrades and Options

- Core installation upgrade (combine wand + core in the crafting grid) - Toggleable options (lock/direction/replace/match/random/core) - Wand GUI (open with key combo while right-clicking in air)

Undo and Preview

- Undo history - Undo preview sync (triggered by key query) - Automatic preview refresh after undo - Preview colors: - Destruction core: red - Undo preview: green - Angel core supports air-target preview

Default Controls

- `Shift + Ctrl + Mouse Wheel`: toggle lock mode - `Shift + Ctrl + Left Click` (swing in air): switch core - `Shift + Ctrl + Right Click` (in air): open wand config GUI - Hold `Shift + Ctrl`: show undo preview - `Shift + Right Click` on block (while holding wand): perform undo