feat: implement leaderboard page and integrate into application routing

src/App.jsx

@@ -9,9 +9,7 @@ import Dashboard from './pages/Dashboard'
 import Admin from './pages/Admin'
 import Leren from './pages/Leren'
 import Testen from './pages/Testen'
-
-// Placeholder components for routing structure
-const Leaderboard = () => <div className="p-4 md:p-8"><h1 className="text-3xl md:text-4xl text-teal font-bold">Leaderboard</h1><p className="mt-4">See who is on top!</p></div>
+import Leaderboard from './pages/Leaderboard'
 
 // Protected Route Wrapper
 const ProtectedRoute = ({ children, requireAdmin }) => {

src/pages/Leaderboard.jsx

@@ -0,0 +1,170 @@
+import React, { useState, useEffect } from 'react';
+import { Trophy, Medal, Award, TrendingUp, Star } from 'lucide-react';
+import { motion } from 'framer-motion';
+import Card from '../components/ui/Card';
+import Tag from '../components/ui/Tag';
+import { useApp } from '../store/AppContext';
+import { storage } from '../lib/storage';
+
+const BADGE_RULES = [
+  { id: 'first_test', icon: Star, label: 'First Steps', condition: (u) => u.testsCompleted > 0 },
+  { id: 'perfectionist', icon: Award, label: 'Perfectionist', condition: (u) => u.perfectScores > 0 },
+  { id: 'veteran', icon: Medal, label: 'Veteran', condition: (u) => u.testsCompleted >= 5 },
+];
+
+const Leaderboard = () => {
+  const { state } = useApp();
+  const [board, setBoard] = useState([]);
+
+  useEffect(() => {
+    // Re-evaluate badges before displaying
+    let data = storage.get('leaderboard:current', []);
+    
+    // Supplement with users that haven't scored yet
+    const allUsers = storage.get('users:registry', []);
+    const userMap = new Map(data.map(u => [u.userId, u]));
+
+    allUsers.forEach(user => {
+      if (!userMap.has(user.id) && user.role !== 'admin') {
+        data.push({
+          userId: user.id,
+          name: user.name,
+          points: 0,
+          testsCompleted: 0,
+        });
+      }
+    });
+
+    // Check for perfect scores by peeking at test results
+    data = data.map(entry => {
+      let perfectScores = 0;
+      // Loop over all possible weeks
+      for (let w = 1; w <= state.weekNumber; w++) {
+        const result = storage.get(`quiz:result:${entry.userId}:week:${w}`);
+        if (result && result.percentage === 100) perfectScores++;
+      }
+      return { ...entry, perfectScores };
+    });
+
+    data.sort((a, b) => b.points - a.points);
+    setBoard(data);
+  }, [state.weekNumber]);
+
+  return (
+    <div className="p-4 md:p-8 max-w-4xl mx-auto pb-24 md:pb-8">
+      <div className="text-center mb-12">
+        <Trophy size={56} className="mx-auto text-teal/30 mb-4" />
+        <h1 className="text-3xl md:text-4xl font-bold text-teal mb-3">Company Leaderboard</h1>
+        <p className="text-fg-muted">Compete, learn, and earn badges based on your weekly knowledge tests.</p>
+      </div>
+
+      {/* Top 3 Podium */}
+      {board.length >= 3 && (
+        <div className="flex justify-center items-end gap-2 md:gap-6 mb-16 h-64 mt-12">
+          {/* 2nd Place */}
+          <motion.div initial={{ y: 50, opacity: 0 }} animate={{ y: 0, opacity: 1 }} transition={{ delay: 0.2 }} className="w-1/3 max-w-[140px] flex flex-col items-center">
+            <div className="relative mb-4">
+              <div className="w-16 h-16 rounded-full bg-slate-200 border-4 border-paper flex items-center justify-center text-slate-500 font-bold text-2xl shadow-lg z-10 relative">2</div>
+              <div className="absolute -inset-2 bg-slate-100 rounded-full z-0 blur-sm"></div>
+            </div>
+            <p className="font-bold text-center truncate w-full px-2">{board[1].name}</p>
+            <p className="text-teal font-medium text-sm">{board[1].points} pts</p>
+            <div className="w-full h-24 bg-gradient-to-t from-slate-200/50 to-transparent rounded-t-[var(--r-sm)] mt-4"></div>
+          </motion.div>
+
+          {/* 1st Place */}
+          <motion.div initial={{ y: 50, opacity: 0 }} animate={{ y: 0, opacity: 1 }} className="w-1/3 max-w-[160px] flex flex-col items-center z-10">
+            <div className="relative mb-6">
+              <div className="w-20 h-20 rounded-full bg-yellow-400 border-4 border-paper flex items-center justify-center text-yellow-800 font-bold text-3xl shadow-xl z-10 relative">1</div>
+              <div className="absolute -inset-3 bg-yellow-300 rounded-full z-0 blur-md opacity-60"></div>
+              <Trophy size={24} className="absolute -top-6 left-1/2 -translate-x-1/2 text-yellow-500" />
+            </div>
+            <p className="font-bold text-center text-lg truncate w-full px-2">{board[0].name}</p>
+            <p className="text-teal font-bold">{board[0].points} pts</p>
+            <div className="w-full h-32 bg-gradient-to-t from-yellow-400/20 to-transparent rounded-t-[var(--r-sm)] mt-4 border-t border-yellow-400/30"></div>
+          </motion.div>
+
+          {/* 3rd Place */}
+          <motion.div initial={{ y: 50, opacity: 0 }} animate={{ y: 0, opacity: 1 }} transition={{ delay: 0.4 }} className="w-1/3 max-w-[140px] flex flex-col items-center">
+            <div className="relative mb-4">
+              <div className="w-16 h-16 rounded-full bg-amber-700 border-4 border-paper flex items-center justify-center text-white font-bold text-2xl shadow-lg z-10 relative">3</div>
+              <div className="absolute -inset-2 bg-amber-800/20 rounded-full z-0 blur-sm"></div>
+            </div>
+            <p className="font-bold text-center truncate w-full px-2">{board[2].name}</p>
+            <p className="text-teal font-medium text-sm">{board[2].points} pts</p>
+            <div className="w-full h-20 bg-gradient-to-t from-amber-700/10 to-transparent rounded-t-[var(--r-sm)] mt-4"></div>
+          </motion.div>
+        </div>
+      )}
+
+      {/* Full List */}
+      <Card className="border border-bg-warm p-0 overflow-hidden">
+        <div className="divide-y divide-bg-warm">
+          {board.map((user, index) => {
+            const earnedBadges = BADGE_RULES.filter(r => r.condition(user));
+            const isMe = user.userId === state.currentUser?.id;
+
+            return (
+              <motion.div 
+                initial={{ opacity: 0, x: -20 }}
+                animate={{ opacity: 1, x: 0 }}
+                transition={{ delay: index * 0.05 }}
+                key={user.userId} 
+                className={`p-4 flex flex-col sm:flex-row sm:items-center gap-4 transition-colors ${isMe ? 'bg-teal/5 border-l-4 border-teal' : 'hover:bg-bg-warm/30'}`}
+              >
+                {/* Rank & Name */}
+                <div className="flex items-center gap-4 min-w-[200px]">
+                  <span className={`font-mono text-lg font-bold w-6 text-center ${
+                    index === 0 ? 'text-yellow-500' :
+                    index === 1 ? 'text-slate-400' :
+                    index === 2 ? 'text-amber-700' : 'text-fg-muted'
+                  }`}>
+                    #{index + 1}
+                  </span>
+                  <div>
+                    <p className="font-bold flex items-center gap-2">
+                      {user.name}
+                      {isMe && <Tag variant="accent" className="text-[10px]">You</Tag>}
+                    </p>
+                    <p className="text-xs text-fg-muted flex items-center gap-1">
+                      <CheckSquare size={12} /> {user.testsCompleted || 0} tests completed
+                    </p>
+                  </div>
+                </div>
+
+                {/* Points */}
+                <div className="flex-1 flex sm:justify-center">
+                  <div className="flex items-center gap-1.5 text-teal font-bold bg-teal/10 px-3 py-1 rounded-full text-sm">
+                    <TrendingUp size={14} />
+                    {user.points} pts
+                  </div>
+                </div>
+
+                {/* Badges */}
+                <div className="flex gap-2 sm:justify-end min-w-[120px]">
+                  {earnedBadges.length > 0 ? (
+                    earnedBadges.map(b => (
+                      <div key={b.id} title={b.label} className="w-8 h-8 rounded-full bg-bg-warm flex items-center justify-center text-teal shadow-sm border border-bg-warm">
+                        <b.icon size={14} />
+                      </div>
+                    ))
+                  ) : (
+                    <span className="text-xs text-fg-muted italic">No badges yet</span>
+                  )}
+                </div>
+              </motion.div>
+            );
+          })}
+
+          {board.length === 0 && (
+            <div className="p-8 text-center text-fg-muted">
+              No one is on the leaderboard yet. Be the first to complete a test!
+            </div>
+          )}
+        </div>
+      </Card>
+    </div>
+  );
+};
+
+export default Leaderboard;