feat: improve guesses collapse timing, win screen CTA, and progress page polish

- GuessesTable now accepts a `minimized` prop instead of deriving collapse from `isWon`, giving the parent control over timing
- Delay collapsing guesses grid until win animations complete (1800ms), skipped for already-completed puzzles
- Replace plain progress link on win screen with a styled green button matching other CTAs
- Progress page: remove redundant subtitle and nav button from header, add book status legend, add axis labels to guess history chart

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/components/WinScreen.svelte

@@ -330,12 +330,9 @@
 	{/if}
 
 	{#if isLoggedIn}
-		<a
-			href="/progress"
-			class="text-sm text-center text-gray-500 dark:text-gray-400 hover:text-emerald-600 dark:hover:text-emerald-400 transition-colors"
-		>
-			View your progress →
-		</a>
+		<div class="signin-prompt">
+			<a href="/progress" class="progress-btn"> 📈 See your progress </a>
+		</div>
 	{:else}
 		<div class="signin-prompt">
 			<p class="signin-text">
@@ -712,4 +709,43 @@
 		height: 1.1rem;
 		flex-shrink: 0;
 	}
+
+	.progress-btn {
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		gap: 0.5rem;
+		padding: 0.6rem 1rem;
+		width: 100%;
+		margin-bottom: 0.6rem;
+		background: #059669;
+		color: #fff;
+		border-radius: 0.5rem;
+		font-size: 0.95rem;
+		font-weight: 600;
+		text-decoration: none;
+		transition:
+			background 150ms ease,
+			transform 80ms ease;
+	}
+	.progress-btn:hover {
+		background: #047857;
+		transform: translateY(-1px);
+	}
+	.progress-btn:active {
+		background: #065f46;
+		transform: scale(0.98);
+	}
+	@media (prefers-color-scheme: dark) {
+		.progress-btn {
+			background: #10b981;
+			color: #fff;
+		}
+		.progress-btn:hover {
+			background: #059669;
+		}
+		.progress-btn:active {
+			background: #047857;
+		}
+	}
 </style>