Add read-only OCSentinel debug dashboard

infra/debug-dashboard/templates/overview.html

@@ -0,0 +1,35 @@
+{% extends "base.html" %}
+{% block content %}
+<section class="hero">
+  <p class="eyebrow">Central Ingest</p>
+  <h1>Endpoint Signals, ohne Rauschen.</h1>
+  <p>Letzte signierte OCSentinel-Berichte aus PostgreSQL.</p>
+</section>
+
+<section class="metrics">
+  <article><span>Berichtende Geräte</span><strong>{{ summary[0] }}</strong></article>
+  <article><span>Warnungen</span><strong class="warning">{{ summary[1] }}</strong></article>
+  <article><span>Kritisch</span><strong class="critical">{{ summary[2] }}</strong></article>
+  <article><span>Events</span><strong>{{ summary[3] }}</strong></article>
+  <article><span>Letzter Eingang</span><strong class="timestamp">{{ summary[7] or 'noch keiner' }}</strong></article>
+</section>
+
+{% if alerts %}
+<section class="panel alert-panel">
+  <div class="panel-heading"><p class="eyebrow">Priorität</p><h2>Auffällige Geräte</h2></div>
+  <div class="alert-grid">
+  {% for alert in alerts %}
+    <a class="alert-card {{ alert[1] }}" href="{{ url_for('device', machine_name=alert[0]) }}">
+      <span>{{ alert[1] }}</span><strong>{{ alert[0] }}</strong><small>{{ alert[2] }} Events · {{ alert[3] }} IPs · {{ alert[4] }}</small>
+    </a>
+  {% endfor %}
+  </div>
+</section>
+{% endif %}
+
+<section class="panel">
+  <div class="panel-heading"><p class="eyebrow">Live-Bestand</p><h2>Letzte Geräteberichte</h2></div>
+  <div class="table-wrap"><table><thead><tr><th>Gerät</th><th>Organisation</th><th>Status</th><th>Events</th><th>IPs</th><th>Empfangen</th></tr></thead>
+  <tbody>{% for row in reports %}<tr><td><a href="{{ url_for('device', machine_name=row[0]) }}">{{ row[0] }}</a></td><td>{{ row[1] or '—' }}</td><td><span class="state {{ row[3] }}">{{ row[3] }}</span></td><td>{{ row[4] }}</td><td>{{ row[5] }}</td><td>{{ row[2] or '—' }}</td></tr>{% endfor %}</tbody></table></div>
+</section>
+{% endblock %}