Rev 20: a wave names its victims before it pushes (LK97)

Kestrel stood against a wall Mad Hywel turned to water, was washed one
square back into stone, and was crushed twice. The sweep walked the
way it pushed: having shoved him onto the next square, its next probe
found him there and shoved him again with the force left. From rev 20
a sweep names every victim along its line first, then pushes each
once; older games replay the double shove. A test washes a wizard one
square into a wall under both readings.

With it, a client fix: a tap on a bare square while holding a card no
longer walks there. Kestrel tapped a slime with LIGHTNING BLAST in hand
and strode into it. The tap now says the card is aimed at a wizard or
creature and leaves the feet alone.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jm2auWk6RP71CjaAb4FMoG

packages/web/src/App.svelte

@@ -912,6 +912,13 @@
       return;
     }
     const me = view.players.find((p) => p.id === view.you)!;
+    // A card in hand is aimed, not walked with: a tap on a bare square
+    // while holding one is a miss, never a stride into whatever is there.
+    if (selectedCard) {
+      net.error = `${cardDef(selectedCard.cardId).name} is aimed by tapping a wizard or creature — put the card down to walk`;
+      setTimeout(() => { if (net.error?.startsWith(cardDef(selectedCard!.cardId).name)) net.error = null; }, 5000);
+      return;
+    }
     // A cell click is a move if the cell is one legal step away (the server
     // also lets doors/walls pass when unlocked/misted — try the direction).
     for (const side of SIDES) {