feat: add reveal answer functionality to reset score and update selected characters

src/routes/(game)/infinite/+page.svelte

@@ -177,6 +177,13 @@
 		columnVisibility[column] = !columnVisibility[column];
 		columnVisibility = columnVisibility; // Trigger reactivity
 	}
+
+	function revealAnswer() {
+		// Reset score (strike)
+		score = 0;
+		// Add the current character as the correct answer
+		selectedCharacters = [currentCharacter, ...selectedCharacters];
+	}
 </script>
 
 <svelte:head>
@@ -312,6 +319,15 @@
 						{selectedCharacters}
 						on:select={handleCharacterSelect}
 					/>
+					<div class="flex justify-center">
+						<button
+							type="button"
+							onclick={revealAnswer}
+							class="rounded-full border border-red-500/40 bg-transparent px-5 py-2 text-sm font-semibold text-red-300 transition hover:border-red-500 hover:bg-red-900/20"
+						>
+							Révéler la réponse
+						</button>
+					</div>
 				{/if}
 			{:else}
 				<div class="rounded-3xl border border-white/10 bg-white/5 p-6 shadow-[0_24px_60px_rgba(0,0,0,0.45)] backdrop-blur">