Fix plugin API signatures and dashboard JS for InvenTree compatibility

- Add context parameter to get_ui_panels and get_ui_dashboard_items
- Fix renderDashboardItem signature to (target, data) per InvenTree API
- Export plugin class from __init__.py for discovery

inventree_print_demand/__init__.py

@@ -0,0 +1,6 @@
+"""InvenTree 3D Print Demand Plugin."""
+
+from .plugin import PrintDemandPlugin
+
+__all__ = ["PrintDemandPlugin"]
+__version__ = "0.1.0"

inventree_print_demand/plugin.py

@@ -38,10 +38,10 @@ class PrintDemandPlugin(SettingsMixin, UrlsMixin, UserInterfaceMixin, InvenTreeP
             re_path(r'^api/demand/', self.api_demand, name='api-demand'),
         ]
 
-    def get_ui_panels(self, request, **kwargs):
+    def get_ui_panels(self, request, context, **kwargs):
         return []
 
-    def get_ui_dashboard_items(self, request, **kwargs):
+    def get_ui_dashboard_items(self, request, context, **kwargs):
         return [
             {
                 'key': 'print-demand',

inventree_print_demand/static/print_demand/dashboard.js

@@ -5,8 +5,11 @@
  * a colour-coded table showing stock vs demand for every 3D-printed part.
  */
 
-export function renderDashboardItem(context) {
+export function renderDashboardItem(target, data) {
-    const target = context.target;
+    if (!target) {
+        console.error("No target provided to renderDashboardItem");
+        return;
+    }
 
     target.innerHTML = '<em>Loading 3D print demand data...</em>';