fix: move offline SVG export from buttons() to right_page()

The buttons() plugin-template-extension hook was registered for
dcim.rack and rendered without error, but the button HTML never
appeared on the rendered rack detail page in production — NetBox's
Rack detail template apparently doesn't wire the buttons() slot into
its controls row. right_page() is confirmed working for this plugin
already (the device rack-width panel uses it), so the export links
now render there as a small card instead.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

netbox_utilities/__init__.py

@@ -1,6 +1,6 @@
 from netbox.plugins import PluginConfig, get_plugin_config
 
-__version__ = "0.11.0"
+__version__ = "0.11.1"
 
 
 class NetBoxUtilitiesConfig(PluginConfig):

netbox_utilities/template_content.py

@@ -155,12 +155,12 @@ class ConnectionVLANContent(PluginTemplateExtension):
 class RackUtilitiesContent(PluginTemplateExtension):
     models = ["dcim.rack"]
 
-    def buttons(self):
+    def right_page(self):
         if not offline_svg_export_enabled():
             return ""
         rack = self.context["object"]
         return self.render(
-            "netbox_utilities/rack_offline_svg_buttons.html",
+            "netbox_utilities/rack_offline_svg_panel.html",
             {"rack": rack},
         )
 

netbox_utilities/templates/netbox_utilities/rack_offline_svg_buttons.html

@@ -1,10 +0,0 @@
-<a href="{% url 'plugins:netbox_utilities:rack_elevation_offline_svg' pk=rack.pk %}?face=front"
-   class="btn btn-outline-secondary" title="Vorderseite als linkfreie SVG-Datei herunterladen">
-  <i class="mdi mdi-download" aria-hidden="true"></i>
-  SVG offline (vorne)
-</a>
-<a href="{% url 'plugins:netbox_utilities:rack_elevation_offline_svg' pk=rack.pk %}?face=rear"
-   class="btn btn-outline-secondary" title="Rückseite als linkfreie SVG-Datei herunterladen">
-  <i class="mdi mdi-download" aria-hidden="true"></i>
-  SVG offline (hinten)
-</a>

netbox_utilities/templates/netbox_utilities/rack_offline_svg_panel.html

@@ -0,0 +1,15 @@
+<div class="card">
+  <h2 class="card-header">SVG offline exportieren</h2>
+  <div class="card-body d-flex flex-column gap-2">
+    <a href="{% url 'plugins:netbox_utilities:rack_elevation_offline_svg' pk=rack.pk %}?face=front"
+       class="btn btn-outline-secondary" title="Vorderseite als linkfreie SVG-Datei herunterladen">
+      <i class="mdi mdi-download" aria-hidden="true"></i>
+      Vorderseite
+    </a>
+    <a href="{% url 'plugins:netbox_utilities:rack_elevation_offline_svg' pk=rack.pk %}?face=rear"
+       class="btn btn-outline-secondary" title="Rückseite als linkfreie SVG-Datei herunterladen">
+      <i class="mdi mdi-download" aria-hidden="true"></i>
+      Rückseite
+    </a>
+  </div>
+</div>