diff --git a/web-dashboard/index.html b/web-dashboard/index.html
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+++ b/web-dashboard/index.html
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+<!DOCTYPE html>
+<html lang="de">
+<head>
+<meta charset="UTF-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+<title>WG Nackenheim — Vermieter-Cockpit</title>
+<style>
+  :root {
+    --bg: #F5F6F5;
+    --card-bg: #FFFFFF;
+    --text: #1F2933;
+    --text-muted: #6B7280;
+    --border: #E5E7EB;
+    --green: #2E7D6B;
+    --green-bg: #E6F4EF;
+    --yellow: #B8860B;
+    --yellow-bg: #FBF3D9;
+    --red: #C0392B;
+    --red-bg: #FBEAE8;
+    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
+  }
+  * { box-sizing: border-box; }
+  body {
+    margin: 0;
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    background: var(--bg);
+    color: var(--text);
+  }
+  header {
+    padding: 28px 32px 16px;
+    display: flex;
+    justify-content: space-between;
+    align-items: flex-end;
+    flex-wrap: wrap;
+    gap: 12px;
+  }
+  header h1 { font-size: 22px; margin: 0 0 4px; font-weight: 700; }
+  header p { margin: 0; color: var(--text-muted); font-size: 14px; }
+  .meta { text-align: right; font-size: 12px; color: var(--text-muted); }
+  .refresh-btn {
+    border: 1px solid var(--border);
+    background: var(--card-bg);
+    border-radius: 8px;
+    padding: 8px 14px;
+    font-size: 13px;
+    cursor: pointer;
+    color: var(--text);
+    box-shadow: var(--shadow);
+  }
+  .refresh-btn:hover { background: #FAFAFA; }
+
+  main { padding: 8px 32px 40px; max-width: 1100px; margin: 0 auto; }
+
+  .stat-row {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
+    gap: 12px;
+    margin: 16px 0 28px;
+  }
+  .stat-tile {
+    background: var(--card-bg);
+    border-radius: 12px;
+    padding: 16px 18px;
+    box-shadow: var(--shadow);
+  }
+  .stat-tile .value { font-size: 26px; font-weight: 700; }
+  .stat-tile .label { font-size: 12.5px; color: var(--text-muted); margin-top: 2px; }
+  .stat-tile.green .value { color: var(--green); }
+  .stat-tile.yellow .value { color: var(--yellow); }
+  .stat-tile.red .value { color: var(--red); }
+
+  section h2 {
+    font-size: 15px;
+    text-transform: uppercase;
+    letter-spacing: 0.04em;
+    color: var(--text-muted);
+    margin: 28px 0 12px;
+  }
+
+  .room-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
+    gap: 14px;
+  }
+  .room-card {
+    background: var(--card-bg);
+    border-radius: 14px;
+    padding: 18px;
+    box-shadow: var(--shadow);
+    border-left: 5px solid var(--border);
+  }
+  .room-card.GREEN { border-left-color: var(--green); }
+  .room-card.YELLOW { border-left-color: var(--yellow); }
+  .room-card.RED { border-left-color: var(--red); }
+
+  .room-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
+  .room-card .room-name { font-weight: 700; font-size: 16px; }
+  .badge {
+    font-size: 11px;
+    font-weight: 700;
+    padding: 3px 9px;
+    border-radius: 999px;
+    text-transform: uppercase;
+    letter-spacing: 0.03em;
+  }
+  .badge.GREEN { background: var(--green-bg); color: var(--green); }
+  .badge.YELLOW { background: var(--yellow-bg); color: var(--yellow); }
+  .badge.RED { background: var(--red-bg); color: var(--red); }
+
+  .room-card .tenant { color: var(--text-muted); font-size: 13.5px; margin-bottom: 10px; }
+  .room-card .amount-row { display: flex; justify-content: space-between; font-size: 13.5px; }
+  .room-card .amount-row .label { color: var(--text-muted); }
+  .room-card .amount-row .value { font-weight: 600; }
+
+  .ticket-list { display: flex; flex-direction: column; gap: 10px; }
+  .ticket-row {
+    background: var(--card-bg);
+    border-radius: 10px;
+    padding: 12px 16px;
+    box-shadow: var(--shadow);
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    gap: 12px;
+    flex-wrap: wrap;
+  }
+  .ticket-row .title { font-weight: 600; font-size: 14px; }
+  .ticket-row .meta-text { color: var(--text-muted); font-size: 12.5px; }
+  .priority-chip {
+    font-size: 11px;
+    font-weight: 700;
+    padding: 3px 9px;
+    border-radius: 999px;
+    background: #EEF0F2;
+    color: var(--text-muted);
+  }
+  .priority-chip.EMERGENCY, .priority-chip.HIGH { background: var(--red-bg); color: var(--red); }
+  .priority-chip.MEDIUM { background: var(--yellow-bg); color: var(--yellow); }
+
+  .empty-state {
+    background: var(--card-bg);
+    border-radius: 12px;
+    padding: 24px;
+    text-align: center;
+    color: var(--text-muted);
+    box-shadow: var(--shadow);
+    font-size: 14px;
+  }
+
+  .error-banner {
+    background: var(--red-bg);
+    color: var(--red);
+    border-radius: 10px;
+    padding: 14px 18px;
+    margin-bottom: 20px;
+    font-size: 14px;
+  }
+  .error-banner code { background: rgba(0,0,0,0.06); padding: 1px 5px; border-radius: 4px; }
+</style>
+</head>
+<body>
+
+<header>
+  <div>
+    <h1>WG Nackenheim — Vermieter-Cockpit</h1>
+    <p>170 qm · 4 Zimmer · Einzelzimmervermietung</p>
+  </div>
+  <div style="display:flex; align-items:center; gap:12px;">
+    <div class="meta" id="lastUpdated">–</div>
+    <button class="refresh-btn" onclick="loadData()">↻ Aktualisieren</button>
+  </div>
+</header>
+
+<main>
+  <div id="errorBanner" style="display:none" class="error-banner"></div>
+
+  <div class="stat-row" id="statRow"></div>
+
+  <section>
+    <h2>Miet-Ampel je Zimmer</h2>
+    <div class="room-grid" id="roomGrid"></div>
+  </section>
+
+  <section>
+    <h2>Offene Schadensmeldungen</h2>
+    <div class="ticket-list" id="ticketList"></div>
+  </section>
+</main>
+
+<script>
+  const API_BASE_URL = window.WG_API_BASE_URL ||
+    (location.protocol === 'file:' ? 'http://localhost:3000/v1' : '/v1');
+  const REFRESH_INTERVAL_MS = 20000;
+
+  const STATUS_LABEL = { GREEN: 'Bezahlt', YELLOW: 'Fällig', RED: 'Überfällig' };
+  const PRIORITY_LABEL = { LOW: 'Niedrig', MEDIUM: 'Mittel', HIGH: 'Hoch', EMERGENCY: 'Notfall' };
+
+  function formatEuro(n) {
+    return new Intl.NumberFormat('de-DE', { style: 'currency', currency: 'EUR' }).format(n || 0);
+  }
+
+  function el(tag, className, html) {
+    const e = document.createElement(tag);
+    if (className) e.className = className;
+    if (html !== undefined) e.innerHTML = html;
+    return e;
+  }
+
+  async function loadData() {
+    const errorBanner = document.getElementById('errorBanner');
+    errorBanner.style.display = 'none';
+    try {
+      const res = await fetch(`${API_BASE_URL}/cockpit/summary`);
+      if (!res.ok) throw new Error(`Server antwortete mit Status ${res.status}`);
+      const data = await res.json();
+      render(data);
+    } catch (err) {
+      errorBanner.style.display = 'block';
+      errorBanner.innerHTML = `Backend nicht erreichbar unter <code>${API_BASE_URL}</code>. ` +
+        `Läuft <code>setup-and-start.bat</code> noch? (${err.message})`;
+    }
+  }
+
+  function render(data) {
+    document.getElementById('lastUpdated').textContent =
+      'Stand: ' + new Date(data.generatedAt).toLocaleTimeString('de-DE');
+
+    // --- Stat-Kacheln ---
+    const statRow = document.getElementById('statRow');
+    statRow.innerHTML = '';
+    const stats = [
+      { label: 'Bezahlt', value: data.summary.rentGreen, cls: 'green' },
+      { label: 'Fällig', value: data.summary.rentYellow, cls: 'yellow' },
+      { label: 'Überfällig', value: data.summary.rentRed, cls: 'red' },
+      { label: 'Soll-Miete gesamt / Monat', value: formatEuro(data.summary.totalMonthlyRentTarget), cls: '' },
+      { label: 'Offene Tickets', value: data.summary.openTicketsCount, cls: '' },
+    ];
+    stats.forEach(s => {
+      const tile = el('div', `stat-tile ${s.cls}`);
+      tile.appendChild(el('div', 'value', s.value));
+      tile.appendChild(el('div', 'label', s.label));
+      statRow.appendChild(tile);
+    });
+
+    // --- Zimmer-Ampeln ---
+    const roomGrid = document.getElementById('roomGrid');
+    roomGrid.innerHTML = '';
+    if (!data.trafficLights.length) {
+      roomGrid.appendChild(el('div', 'empty-state', 'Keine aktiven Verträge gefunden.'));
+    }
+    data.trafficLights.forEach(light => {
+      const card = el('div', `room-card ${light.status}`);
+      const top = el('div', 'room-card-top');
+      top.appendChild(el('div', 'room-name', light.roomNumber));
+      top.appendChild(el('div', `badge ${light.status}`, STATUS_LABEL[light.status]));
+      card.appendChild(top);
+      card.appendChild(el('div', 'tenant', light.tenantName));
+
+      const amountRow = el('div', 'amount-row');
+      amountRow.appendChild(el('span', 'label', 'Fällig'));
+      amountRow.appendChild(el('span', 'value', formatEuro(light.amountDue)));
+      card.appendChild(amountRow);
+
+      if (light.status === 'GREEN') {
+        const paidRow = el('div', 'amount-row');
+        paidRow.appendChild(el('span', 'label', 'Bezahlt'));
+        paidRow.appendChild(el('span', 'value', formatEuro(light.amountPaid)));
+        card.appendChild(paidRow);
+      }
+      roomGrid.appendChild(card);
+    });
+
+    // --- Offene Tickets ---
+    const ticketList = document.getElementById('ticketList');
+    ticketList.innerHTML = '';
+    if (!data.openTickets.length) {
+      ticketList.appendChild(el('div', 'empty-state', 'Aktuell keine offenen Schadensmeldungen. 🎉'));
+    }
+    data.openTickets.forEach(t => {
+      const row = el('div', 'ticket-row');
+      const left = el('div');
+      left.appendChild(el('div', 'title', t.title));
+      left.appendChild(el('div', 'meta-text',
+        `${t.room ? t.room.roomNumber : 'Gemeinschaftsbereich'} · ${new Date(t.createdAt).toLocaleDateString('de-DE')}`));
+      row.appendChild(left);
+      row.appendChild(el('span', `priority-chip ${t.priority}`, PRIORITY_LABEL[t.priority] || t.priority));
+      ticketList.appendChild(row);
+    });
+  }
+
+  loadData();
+  setInterval(loadData, REFRESH_INTERVAL_MS);
+</script>
+
+</body>
+</html>
