Amplify announces itself

Room 9BBV's "impossible" 14-point powerthrust was an archmage playing
correctly: 2 + 5, AMPLIFIED. The engine's math was honest and its
narration was not — neither the log line nor the attack modal
mentioned the amplify, so a legal kill read as a bug. The spellCast
event now carries its amplify count, the chronicle says "casts
Powerthrust with a 5, AMPLIFIED, at Kestrel", and the modal's power
line shows "powered by a 5 — AMPLIFIED ×2" while there is still time
to respect it.

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

packages/web/src/App.svelte

@@ -1091,8 +1091,11 @@
           {:else}
             <div class="attack-card"><Card card={view.stack.attackCard} /></div>
           {/if}
-          {#if view.stack.numberValue != null}
-            <div class="attack-power">powered by a {view.stack.numberValue}</div>
+          {#if view.stack.numberValue != null || view.stack.amplifyFactor > 1}
+            <div class="attack-power">
+              {view.stack.numberValue != null ? `powered by a ${view.stack.numberValue}` : ""}
+              {view.stack.amplifyFactor > 1 ? ` — AMPLIFIED ×${view.stack.amplifyFactor}` : ""}
+            </div>
           {/if}
         {:else if view.stack.defenderId === view.you}
           <div class="attack-fist">👊 a bare-knuckled punch</div>