Boobytrap tokens land where you can see them

The four placements accumulated invisibly until the last click cast
the spell. Each token now marks its square as it is placed, numbered
in click order — the 1 is the real trap — and tapping a placed token
lifts it again, since the four must be distinct squares.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/web/src/Board.svelte

@@ -17,6 +17,7 @@
     onWarpClick,
     onCellPeek,
     markedCell = null,
+    markedCells = null,
     litCells = null,
     markedSector = null,
     ghostSlots = null,
@@ -34,6 +35,9 @@
     onCellPeek?: (cell: { x: number; y: number }) => void;
     /** First square of a two-square spell: marked so the click reads as taken. */
     markedCell?: { x: number; y: number } | null;
+    /** A multi-square placement in progress (boobytrap tokens), in click
+     * order — the first is the real trap, so each mark shows its number. */
+    markedCells?: { x: number; y: number }[] | null;
     /** When set, squares NOT in this set dim — the targeting aid. */
     litCells?: Set<string> | null;
     /** Origin of a picked-up 5x5 sector: the whole sector outlines as taken. */
@@ -430,6 +434,19 @@
     />
   {/if}
 
+  <!-- placements so far of a multi-square spell, numbered in click order -->
+  {#each markedCells ?? [] as m, i (`${m.x},${m.y}`)}
+    <rect
+      x={m.x * CELL + 3} y={m.y * CELL + 3}
+      width={CELL - 6} height={CELL - 6}
+      rx="6" class="marked-cell"
+    />
+    <text
+      x={m.x * CELL + CELL / 2} y={m.y * CELL + CELL / 2}
+      class="marked-count" text-anchor="middle" dominant-baseline="central"
+    >{i + 1}</text>
+  {/each}
+
   <!-- the sector picked up, awaiting its new ground -->
   {#if markedSector}
     <rect
@@ -664,6 +681,13 @@
     pointer-events: none;
     animation: warp-pulse 1.6s ease-in-out infinite;
   }
+  .marked-count {
+    font-family: "Oswald", sans-serif;
+    font-size: 15px;
+    font-weight: 600;
+    fill: #d3852b;
+    pointer-events: none;
+  }
   .marked-sector {
     fill: rgba(211, 133, 43, 0.12);
     stroke: #d3852b;