v2.6.3 (Lyra): Content multi-type handling, getAllPages() structuur, . verberg-prefix

- Content bestanden met dezelfde naam maar ander type (md/php/html) worden
  correct geserveerd: URL met extensie opent dat bestand, URL zonder extensie
  valt terug op md > php > html (resolveContentByType helper)
- Admin content editor accepteert bestanden met dezelfde naam (ander type);
  preview-knop linkt per extensie
- Frontend navigatie/directory listing/search tonen elk bestandstype apart
- getAllPages() array structuur gewijzigd naar list van
  ['path','title','type'] met type 'md'/'php'/'html'/'folder'
- Verberg-prefix logica: _ is geen verberg-prefix meer, alleen . (en -);
  admin toont wél alle . bestanden/mappen
- ContentAPI getPage()/pageExists() respecteren expliciete extensie
- Handleiding content-api.md (NL+EN) herschreven
- File-tree unificatie: _file-tree.twig + _editor-styles.twig includes
- Versie verhoogd naar 2.6.3

admin/theme/default/views/pages/content-move-form.twig

@@ -4,7 +4,7 @@
 
 {% block content %}
 <div class="d-flex justify-content-between align-items-center mb-4 flex-wrap gap-2">
-    <h2 class="mb-0"><i class="bi bi-arrows-move"></i> {{ ta.file|default('Bestand') }} {{ ta.move_suffix|default('verplaatsen') }}</h2>
+    <h2 class="mb-0"><i class="bi bi-arrows-move"></i> {{ ta.file|default('Bestand') }} {{ ta.move_suffix|default('verplaatsen / hernoemen') }}</h2>
     <a href="/admin/content?file={{ relFile|url_encode }}" class="btn btn-outline-secondary btn-sm">
         <i class="bi bi-arrow-left"></i> {{ ta.back|default('Terug') }}
     </a>
@@ -15,22 +15,29 @@
     <input type="hidden" name="file" value="{{ relFile }}">
     <div class="card-body">
         <div class="alert alert-info">
-            {{ ta.move_prefix|default('Verplaats') }} <strong>{{ itemName }}</strong>
+            {{ ta.move_prefix|default('Verplaats / hernoem') }} <strong>{{ itemName }}{{ itemExt }}</strong>
             {% if itemDir %}<span class="text-muted">(content/{{ itemDir }})</span>{% else %}<span class="text-muted">(content/)</span>{% endif %}
-            {{ ta.move_to|default('naar:') }}
+        </div>
+        <div class="mb-3">
+            <label for="new_name" class="form-label">{{ ta.filename|default('Bestandsnaam') }}</label>
+            <div class="input-group">
+                <input type="text" class="form-control" id="new_name" name="new_name" value="{{ itemName }}" required>
+                <span class="input-group-text">{{ itemExt }}</span>
+            </div>
+            <small class="form-text text-muted">{{ ta.name_help|default('Alleen letters, cijfers, punten, underscores en streepjes.') }}</small>
         </div>
         <div class="mb-3">
             <label for="destination" class="form-label">{{ ta.target_folder|default('Doelmap') }} <small class="text-muted">(content/)</small></label>
             <select class="form-select" id="destination" name="destination" required>
                 {% for directory in directories %}
-                <option value="{{ directory }}">{{ directory == '' ? '(content root)' : directory }}</option>
+                <option value="{{ directory }}" {{ directory == itemDir ? 'selected' : '' }}>{{ directory == '' ? '(content root)' : directory }}</option>
                 {% endfor %}
             </select>
         </div>
     </div>
     <div class="card-footer bg-white">
         <button type="submit" class="btn btn-primary">
-            <i class="bi bi-check-lg"></i> {{ ta.move|default('Verplaatsen') }}
+            <i class="bi bi-check-lg"></i> {{ ta.save|default('Opslaan') }}
         </button>
         <a href="/admin/content?file={{ relFile|url_encode }}" class="btn btn-outline-secondary">{{ ta.cancel|default('Annuleren') }}</a>
     </div>