Phase 3: Django-natives DMS – Paperless-NGX durch DokumentDatei ersetzt

- Neues Modell DokumentDatei mit PostgreSQL FTS (SearchVectorField, GinIndex)
- Upload-Pfad: dokumente/YYYY/MM/<uuid>/dateiname
- 7 DMS-Views: list, detail, download, upload (HTMX Drag&Drop), delete, edit, search_api
- Templates: list, detail, edit, upload mit Drag&Drop-Zone, Partials
- URLs: /dms/ komplett verdrahtet
- Sidebar: DMS als Primäreintrag, Paperless als Legacy
- Migrationsskript: manage.py migrate_paperless_dokumente (DokumentLink → DokumentDatei)
- compose.yml: paperless-Dienst deaktiviert (Legacy-Kommentarblock)
- Migration 0048 angewendet

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/templates/stiftung/dms/edit.html

@@ -0,0 +1,66 @@
+{% extends 'base.html' %}
+{% load static %}
+
+{% block title %}{{ dok.titel }} bearbeiten – DMS – Stiftungsverwaltung{% endblock %}
+
+{% block content %}
+<div class="row justify-content-center">
+    <div class="col-lg-7">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h1 class="h3">
+                <i class="fas fa-edit text-primary me-2"></i>
+                Metadaten bearbeiten
+            </h1>
+            <a href="{% url 'stiftung:dms_detail' pk=dok.pk %}" class="btn btn-outline-secondary">
+                <i class="fas fa-arrow-left me-2"></i>Zurück
+            </a>
+        </div>
+
+        <div class="card shadow">
+            <div class="card-body">
+                <form method="post">
+                    {% csrf_token %}
+
+                    <div class="mb-3">
+                        <label class="form-label fw-semibold">Titel</label>
+                        <input type="text" name="titel" class="form-control"
+                               value="{{ dok.titel }}" required maxlength="255">
+                    </div>
+
+                    <div class="mb-3">
+                        <label class="form-label fw-semibold">Typ / Kontext</label>
+                        <select name="kontext" class="form-select">
+                            {% for code, label in kontext_choices %}
+                            <option value="{{ code }}" {% if code == dok.kontext %}selected{% endif %}>{{ label }}</option>
+                            {% endfor %}
+                        </select>
+                    </div>
+
+                    <div class="mb-4">
+                        <label class="form-label fw-semibold">Beschreibung</label>
+                        <textarea name="beschreibung" class="form-control" rows="3">{{ dok.beschreibung }}</textarea>
+                    </div>
+
+                    <div class="d-flex gap-2 justify-content-end">
+                        <a href="{% url 'stiftung:dms_detail' pk=dok.pk %}" class="btn btn-outline-secondary">Abbrechen</a>
+                        <button type="submit" class="btn btn-primary">
+                            <i class="fas fa-save me-2"></i>Speichern
+                        </button>
+                    </div>
+                </form>
+            </div>
+        </div>
+
+        <!-- Datei-Info (read-only) -->
+        <div class="card shadow mt-4">
+            <div class="card-header bg-light py-2">
+                <span class="small text-muted"><i class="fas fa-file me-2"></i>Datei (nicht änderbar)</span>
+            </div>
+            <div class="card-body py-2">
+                <span class="font-monospace small text-muted">{{ dok.dateiname_original|default:dok.datei.name }}</span>
+                <span class="text-muted small ms-3">{{ dok.get_human_size }}</span>
+            </div>
+        </div>
+    </div>
+</div>
+{% endblock %}