ItemSyncFixes

<p>Item Sync Fixes is my attempt to fix 3 specific Vintage Story inventory desync symptoms. It is intentionally narrow: it does not try to rewrite inventory networking or make the client authoritative.</p> <p>The three targeted symptoms are:</p> <p><br>1. Crafting output ghost items from partial output moves<br>2. Rapid clicking or dragging through crafting grid and cursor interactions can make items feel like they move late, flicker backward, or briefly show stale intermediate states.<br>3. Moving stacks in hotbar/backpack slots can receive exact delayed server self confirmations after the client has already predicted the same final state, causing visible snapback/flicker.</p>