feat: add Dashboard as new startseite

Hero card with next match + countdown, stats tiles (rank, points, streak),
and contextual nudges. Replaces match list as landing page.

frontend/src/App.tsx

@@ -1,6 +1,7 @@
 import { useState, useEffect } from 'react';
 import { Routes, Route, NavLink } from 'react-router-dom';
 import { Sun, Moon, Settings } from 'lucide-react';
+import DashboardPage from './pages/DashboardPage';
 import MatchesPage from './pages/MatchesPage';
 import LeaderboardPage from './pages/LeaderboardPage';
 import ProfilePage from './pages/ProfilePage';
@@ -106,7 +107,7 @@ export default function App() {
 
       <main className={styles.main}>
         <Routes>
-          <Route path="/" element={<MatchesPage key={refreshKey} devUser={devUser} />} />
+          <Route path="/" element={<DashboardPage key={refreshKey} devUser={devUser} />} />
           <Route path="/spiele" element={<MatchesPage key={refreshKey} devUser={devUser} />} />
           <Route path="/rangliste" element={<LeaderboardPage key={refreshKey} />} />
           <Route path="/profil" element={<ProfilePage key={refreshKey} />} />

frontend/src/pages/DashboardPage.module.css

@@ -0,0 +1,141 @@
+.dashboard {
+  padding: 16px;
+  max-width: 600px;
+  margin: 0 auto;
+}
+
+.hero {
+  background: var(--surface-mid);
+  border-radius: var(--radius-lg);
+  padding: 20px;
+  cursor: pointer;
+  border: 1px solid rgba(75, 183, 248, 0.1);
+  transition: transform 0.2s;
+}
+
+.hero:hover {
+  transform: scale(1.01);
+}
+
+.heroLabel {
+  font-size: 0.75rem;
+  text-transform: uppercase;
+  letter-spacing: 1px;
+  color: var(--text-secondary);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.heroCountdown {
+  color: var(--gold);
+  font-weight: 700;
+  font-size: 0.85rem;
+}
+
+.heroTeams {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  gap: 20px;
+  margin: 16px 0;
+}
+
+.heroTeam {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 6px;
+}
+
+.heroCrest {
+  width: 48px;
+  height: 48px;
+  object-fit: contain;
+}
+
+.heroVs {
+  font-size: 1.2rem;
+  font-weight: 700;
+  color: var(--gold);
+}
+
+.heroTip {
+  background: var(--surface-high);
+  border-radius: var(--radius-sm);
+  padding: 8px 16px;
+  text-align: center;
+  color: var(--gold);
+  font-weight: 600;
+}
+
+.heroTipBtn {
+  display: block;
+  width: 100%;
+  padding: 10px;
+  border: none;
+  border-radius: var(--radius-sm);
+  background: var(--primary);
+  color: white;
+  font-weight: 600;
+  cursor: pointer;
+  font-size: 0.95rem;
+}
+
+.statsRow {
+  display: grid;
+  grid-template-columns: 1fr 1fr 1fr;
+  gap: 8px;
+  margin: 16px 0;
+}
+
+.statTile {
+  background: var(--surface-mid);
+  border-radius: var(--radius-md);
+  padding: 14px 8px;
+  text-align: center;
+  border: 1px solid rgba(75, 183, 248, 0.08);
+}
+
+.statValue {
+  display: block;
+  font-size: 1.5rem;
+  font-weight: 700;
+  color: var(--gold);
+}
+
+.statLabel {
+  display: block;
+  font-size: 0.7rem;
+  color: var(--text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  margin-top: 4px;
+}
+
+.nudges {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.nudge {
+  background: var(--surface-low);
+  border-radius: var(--radius-sm);
+  padding: 12px 16px;
+  color: var(--text-secondary);
+  font-size: 0.9rem;
+  cursor: pointer;
+  transition: background 0.2s;
+}
+
+.nudge:hover {
+  background: var(--surface-mid);
+}
+
+.loading,
+.error {
+  text-align: center;
+  padding: 60px 20px;
+  color: var(--text-muted);
+}

frontend/src/pages/DashboardPage.tsx

@@ -0,0 +1,137 @@
+import { useEffect, useState } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { api, DashboardData } from '../api/client';
+import styles from './DashboardPage.module.css';
+
+interface Props {
+  devUser?: number;
+}
+
+function formatCountdown(minutes: number): string {
+  if (minutes < 60) return `in ${minutes} Min`;
+  if (minutes < 60 * 24) return `in ${Math.floor(minutes / 60)}h`;
+  return `in ${Math.floor(minutes / (60 * 24))} Tagen`;
+}
+
+export default function DashboardPage(_props: Props) {
+  const [data, setData] = useState<DashboardData | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState(false);
+  const navigate = useNavigate();
+
+  useEffect(() => {
+    setLoading(true);
+    setError(false);
+    api.getDashboard()
+      .then(d => { setData(d); setLoading(false); })
+      .catch(() => { setError(true); setLoading(false); });
+  }, []);
+
+  if (loading) return <div className={styles.loading}>Laden...</div>;
+  if (error || !data) return <div className={styles.error}>Dashboard konnte nicht geladen werden.</div>;
+
+  const { hero, stats, nudges } = data;
+
+  return (
+    <div className={styles.dashboard}>
+      {/* Hero Card */}
+      <div className={styles.hero} onClick={() => navigate('/spiele')}>
+        <div className={styles.heroLabel}>
+          <span>Nächstes Spiel</span>
+          {hero && (
+            <span className={styles.heroCountdown}>
+              {formatCountdown(hero.match.minutesUntilKickoff)}
+            </span>
+          )}
+        </div>
+
+        {hero ? (
+          <>
+            <div className={styles.heroTeams}>
+              <div className={styles.heroTeam}>
+                {hero.match.homeTeam.crest ? (
+                  <img
+                    src={hero.match.homeTeam.crest}
+                    alt={hero.match.homeTeam.name}
+                    className={styles.heroCrest}
+                  />
+                ) : (
+                  <div className={styles.heroCrest} />
+                )}
+                <span>{hero.match.homeTeam.shortName}</span>
+              </div>
+              <span className={styles.heroVs}>vs</span>
+              <div className={styles.heroTeam}>
+                {hero.match.awayTeam.crest ? (
+                  <img
+                    src={hero.match.awayTeam.crest}
+                    alt={hero.match.awayTeam.name}
+                    className={styles.heroCrest}
+                  />
+                ) : (
+                  <div className={styles.heroCrest} />
+                )}
+                <span>{hero.match.awayTeam.shortName}</span>
+              </div>
+            </div>
+
+            {hero.userTip ? (
+              <div className={styles.heroTip}>
+                Dein Tipp: {hero.userTip.home}:{hero.userTip.away} ✓
+              </div>
+            ) : hero.tippable ? (
+              <button
+                className={styles.heroTipBtn}
+                onClick={e => { e.stopPropagation(); navigate('/spiele'); }}
+              >
+                Jetzt tippen
+              </button>
+            ) : null}
+          </>
+        ) : (
+          <p style={{ textAlign: 'center', color: 'var(--text-muted)', margin: '16px 0' }}>
+            Keine anstehenden Spiele
+          </p>
+        )}
+      </div>
+
+      {/* Stats Row */}
+      <div className={styles.statsRow}>
+        <div className={styles.statTile}>
+          <span className={styles.statValue}>
+            {stats.rank !== null ? stats.rank : '—'}
+          </span>
+          <span className={styles.statLabel}>Dein Rang</span>
+        </div>
+        <div className={styles.statTile}>
+          <span className={styles.statValue}>{stats.totalPoints}</span>
+          <span className={styles.statLabel}>Punkte</span>
+        </div>
+        <div className={styles.statTile}>
+          <span className={styles.statValue}>
+            {stats.streak > 0 ? `${stats.streak} 🔥` : stats.streak}
+          </span>
+          <span className={styles.statLabel}>Streak</span>
+        </div>
+      </div>
+
+      {/* Nudges */}
+      {nudges.length > 0 && (
+        <div className={styles.nudges}>
+          {nudges.map((nudge, i) => (
+            <div
+              key={i}
+              className={styles.nudge}
+              onClick={() => {
+                if (nudge.type === 'untipped') navigate('/spiele');
+                else if (nudge.type === 'leader') navigate('/rangliste');
+              }}
+            >
+              {nudge.text}
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}