feedback7 R23-DRAGSNAP: a dragged operator stands on the tile under the pointer while that is a legal target (a board tile or a bench slot: render/drag.js dragStandTile), as in the official deploy drag (the owner's recording of 2026-10-09), and is held under the pointer elsewhere (an illegal tile, the shop bar); the pick, highlight, tileHover, wheel and drop stay the pointer's tile — the report in PR #403 by @bubububaoshe (not merged); §27.62; golden: unchanged

public/js/render/drag.js

@@ -11,8 +11,10 @@
 // direction wheel to re-orient it in place (research 09 §1.2 — "drag the unit onto its own tile and swipe").
 // Everything is judged at the pointer (user playtest #4 item 1: the ground is drawn as tiles): a press / hover is on the
 // piece standing on the tile under it (`hitPiece`, render/pick.js), and while dragging the target, `tileHover` and the
-// legality are that tile — an item dropped on a unit's tile goes to that unit; app.js holds the dragged ghost under
-// the pointer. A release over DOM UI covering the canvas (the shop bar) is 'outside' (mouse and touch alike).
+// legality are that tile — an item dropped on a unit's tile goes to that unit. app.js draws a dragged unit standing on
+// that tile while it is a legal target (`dragStandTile`, the official deploy drag) and held under the pointer
+// otherwise; an item plate stays on the pointer. A release over DOM UI covering the canvas (the shop bar) is 'outside'
+// (mouse and touch alike).
 //
 // Events emitted through `emit(name, payload)`:
 //   pieceHover     { uid, piece, clientX, clientY } | { uid: null }            (mouse/pen hover changes)
@@ -80,6 +82,21 @@ export function resolveDrop(p) {
   return { kind: 'drop', target: slot };
 }
 
+/**
+ * The tile a dragged UNIT is drawn standing on, from a `pieceDragMove` payload: the drop target under the pointer while
+ * it is legal — a board tile, or a bench slot (row HAND_ROW) — as `{ row, col, bench }` in board space; null otherwise
+ * (no target, an illegal tile, a temp slot, the pointer over DOM UI such as the shop bar): the unit is then held under
+ * the pointer. As in the official deploy drag (the owner's recording of 2026-10-09) the model stands on the tile the
+ * finger is on, and moving within that tile leaves it where it is. app.js never snaps an item plate.
+ */
+export function dragStandTile(move, geo = GEO) {
+  const t = move && move.legal === true ? move.target : null;
+  if (!t) return null;
+  if (t.area === 'board' && Number.isInteger(t.row) && Number.isInteger(t.col)) return { row: t.row, col: t.col, bench: false };
+  if (t.area === 'hand' && Number.isInteger(t.idx)) return { row: geo.HAND_ROW, col: t.idx, bench: true };
+  return null;
+}
+
 /** Legality via the UI callback (board → (piece,row,col); hand → (piece, HAND_ROW, idx)). Throwing ⇒ illegal. */
 export function isLegal(canPlace, piece, slot) {
   if (!slot || slot.area === 'temp' || slot.area === 'outside') return false;