Day 368 Project Rance — Item Drag & Drop Refinement

28/10/2026 Removed custom snapping and attraction during dragging through `Dragged_Implementation()` in RanceInventoryDragDrop.cpp. Equipment is applied only when released. Updated `NativePaint()` and drop-target resolution in RanceInventoryScreenDragDrop.cpp to highlight the whole details panel subtly instead of individual equipment slots. Improved the drag preview’s size and readability, simplified its messages, and added an option to hide hint text completely. Added optional grab-point preservation so the icon stays attached to where the player originally clicked. Fixed the initial movement from the top-left, making the preview appear immediately at the correct cursor position.