feat: add comprehensive GitHub workflow and development tools

app/templates/stiftung/unterstuetzungen_list.html

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+{% extends 'base.html' %}
+{% block title %}Destinatärunterstützungen - Administration{% endblock %}
+{% block content %}
+<div class="d-flex justify-content-between align-items-center mb-4">
+  <h1 class="h3"><i class="fas fa-hand-holding-usd me-2"></i>Destinatärunterstützungen</h1>
+  <div class="btn-group">
+    <a class="btn btn-outline-primary" href="?format=csv"><i class="fas fa-file-csv me-2"></i>CSV exportieren</a>
+    <a class="btn btn-outline-danger" href="?format=pdf"><i class="fas fa-file-pdf me-2"></i>PDF exportieren</a>
+  </div>
+  </div>
+<div class="card shadow">
+  <div class="card-body">
+    <div class="table-responsive">
+      <table class="table table-hover">
+        <thead class="table-light">
+          <tr>
+            <th>Destinatär</th>
+            <th>Bank</th>
+            <th>IBAN</th>
+            <th>Betrag</th>
+            <th>Konto</th>
+            <th>Fällig am</th>
+            <th>Status</th>
+            <th>Beschreibung</th>
+            <th>Aktionen</th>
+          </tr>
+        </thead>
+        <tbody>
+          {% for u in unterstuetzungen %}
+          <tr>
+            <td>{{ u.destinataer.get_full_name }}</td>
+            <td>{{ u.konto.bank_name }}</td>
+            <td>{{ u.konto.iban }}</td>
+            <td>€{{ u.betrag|floatformat:2 }}</td>
+            <td>{{ u.konto }}</td>
+            <td>{{ u.faellig_am|date:"d.m.Y" }}</td>
+            <td><span class="badge bg-secondary">{{ u.get_status_display }}</span></td>
+            <td>{{ u.beschreibung }}</td>
+            <td>
+              <div class="btn-group btn-group-sm" role="group">
+                <a href="{% url 'stiftung:unterstuetzung_edit' pk=u.pk %}" class="btn btn-outline-warning"><i class="fas fa-edit"></i></a>
+                <a href="{% url 'stiftung:unterstuetzung_delete' pk=u.pk %}" class="btn btn-outline-danger"><i class="fas fa-trash"></i></a>
+              </div>
+            </td>
+          </tr>
+          {% empty %}
+          <tr><td colspan="6" class="text-center text-muted">Keine Einträge</td></tr>
+          {% endfor %}
+        </tbody>
+      </table>
+    </div>
+  </div>
+</div>
+{% endblock %}
+