feat: Add statistics tracking and fix clipboard API

- Add personal statistics with badges for each attempt count
- Track solved puzzles per attempt (1-6) and failed attempts
- Display statistics after game completion
- Fix clipboard API issue with fallback method
- Add footer with attribution

components/Statistics.tsx

@@ -0,0 +1,56 @@
+'use client';
+
+import { Statistics as StatsType } from '../lib/gameState';
+
+interface StatisticsProps {
+    statistics: StatsType;
+}
+
+const BADGES = {
+    1: '🏆', // Gold trophy
+    2: '🥈', // Silver medal
+    3: '🥉', // Bronze medal
+    4: '⭐', // Star
+    5: '✨', // Sparkles
+    6: '💫', // Dizzy
+    failed: '❌', // Cross mark
+};
+
+export default function Statistics({ statistics }: StatisticsProps) {
+    const total =
+        statistics.solvedIn1 +
+        statistics.solvedIn2 +
+        statistics.solvedIn3 +
+        statistics.solvedIn4 +
+        statistics.solvedIn5 +
+        statistics.solvedIn6 +
+        statistics.failed;
+
+    const stats = [
+        { attempts: 1, count: statistics.solvedIn1, badge: BADGES[1] },
+        { attempts: 2, count: statistics.solvedIn2, badge: BADGES[2] },
+        { attempts: 3, count: statistics.solvedIn3, badge: BADGES[3] },
+        { attempts: 4, count: statistics.solvedIn4, badge: BADGES[4] },
+        { attempts: 5, count: statistics.solvedIn5, badge: BADGES[5] },
+        { attempts: 6, count: statistics.solvedIn6, badge: BADGES[6] },
+        { attempts: 'Failed', count: statistics.failed, badge: BADGES.failed },
+    ];
+
+    return (
+        <div className="statistics-container">
+            <h3 className="statistics-title">Your Statistics</h3>
+            <p className="statistics-total">Total puzzles: {total}</p>
+            <div className="statistics-grid">
+                {stats.map((stat, index) => (
+                    <div key={index} className="stat-item">
+                        <div className="stat-badge">{stat.badge}</div>
+                        <div className="stat-label">
+                            {typeof stat.attempts === 'number' ? `${stat.attempts} try` : stat.attempts}
+                        </div>
+                        <div className="stat-count">{stat.count}</div>
+                    </div>
+                ))}
+            </div>
+        </div>
+    );
+}