feat(frontend): rewritten stats page with heatmap + progress + due

packages/frontend/src/pages/Stats.tsx

@@ -1,20 +1,54 @@
 import { useEffect, useState } from 'react';
 import { statsApi } from '../api/stats.js';
+import { Heatmap } from '../components/Heatmap.js';
+import { LessonProgressList, type LessonProgressRow } from '../components/LessonProgressList.js';
+import { DueOverviewCard, type DueOverview } from '../components/DueOverviewCard.js';
 
 export function StatsPage() {
   const [heatmap, setHeatmap] = useState<{ day: string; sessions: number; attempts: number }[]>([]);
-  useEffect(() => { statsApi.heatmap(12).then(setHeatmap); }, []);
+  const [progress, setProgress] = useState<LessonProgressRow[]>([]);
+  const [due, setDue] = useState<DueOverview | null>(null);
+
+  useEffect(() => {
+    statsApi.heatmap(52).then(setHeatmap).catch(() => {});
+    statsApi.lessonsProgress().then((r) => setProgress(r.rows)).catch(() => {});
+    statsApi.due().then(setDue).catch(() => {});
+  }, []);
 
-  const max = Math.max(1, ...heatmap.map((d) => d.attempts));
   return (
-    <div className="mx-auto max-w-4xl p-6">
-      <h1 className="mb-4 text-2xl font-semibold">Statistieken</h1>
-      <div className="flex flex-wrap gap-1">
-        {heatmap.map((d) => (
-          <div key={d.day} title={`${d.day}: ${d.attempts} pogingen`} className="h-4 w-4 rounded"
-               style={{ backgroundColor: `rgba(34,197,94,${0.15 + 0.85 * (d.attempts / max)})` }} />
-        ))}
-      </div>
+    <div className="space-y-8">
+      <header>
+        <h1 className="font-display text-3xl font-bold">Statistieken</h1>
+        <p className="text-sm text-slate-500">Houd zicht op je voortgang en wat er te oefenen valt.</p>
+      </header>
+
+      {due && (
+        <section>
+          <h2 className="mb-3 font-display text-xl font-bold">⏰ Te reviewen</h2>
+          <DueOverviewCard data={due} />
+        </section>
+      )}
+
+      <section>
+        <h2 className="mb-3 font-display text-xl font-bold">📊 Voortgang per les</h2>
+        <LessonProgressList rows={progress} />
+      </section>
+
+      <section>
+        <h2 className="mb-3 font-display text-xl font-bold">🔥 Activiteit</h2>
+        <div className="surface p-4">
+          <Heatmap points={heatmap} />
+          <div className="mt-3 flex items-center gap-2 text-xs text-slate-500">
+            <span>minder</span>
+            <span className="h-3 w-3 rounded-sm bg-slate-100 dark:bg-slate-800" />
+            <span className="h-3 w-3 rounded-sm bg-success-200" />
+            <span className="h-3 w-3 rounded-sm bg-success-400" />
+            <span className="h-3 w-3 rounded-sm bg-success-500" />
+            <span className="h-3 w-3 rounded-sm bg-success-700" />
+            <span>meer</span>
+          </div>
+        </div>
+      </section>
     </div>
   );
 }