Display supplier part stock (#717)

* Display supplier part stock

* dart format

* Update release notes

assets/release_notes.md

@@ -1,7 +1,8 @@
 ### 0.21.0 - November 2025
 ---
 
-- Display default stock location in part detail page
+- Display default stock location in Part detail page
+- Display stock information in SupplierPart detail page
 
 ### 0.20.2 - November 2025
 ---

lib/inventree/company.dart

@@ -225,6 +225,10 @@ class InvenTreeSupplierPart extends InvenTreeModel {
 
   int get partId => getInt("part");
 
+  double get inStock => getDouble("in_stock");
+
+  double get onOrder => getDouble("on_order");
+
   String get partImage =>
       (jsondata["part_detail"]?["thumbnail"] ?? InvenTreeAPI.staticThumb)
           as String;

lib/widget/company/supplier_part_detail.dart

@@ -1,6 +1,7 @@
 import "package:flutter/material.dart";
 import "package:flutter_speed_dial/flutter_speed_dial.dart";
 import "package:flutter_tabler_icons/flutter_tabler_icons.dart";
+import "package:inventree/helpers.dart";
 import "package:inventree/widget/link_icon.dart";
 
 import "package:inventree/app_colors.dart";
@@ -15,6 +16,7 @@ import "package:inventree/widget/progress.dart";
 import "package:inventree/widget/refreshable_state.dart";
 import "package:inventree/widget/snacks.dart";
 import "package:inventree/widget/company/manufacturer_part_detail.dart";
+import "package:inventree/widget/stock/stock_list.dart";
 
 /*
  * Detail widget for viewing a single SupplierPart instance
@@ -142,6 +144,28 @@ class _SupplierPartDisplayState
       );
     }
 
+    // Stock levels associated with this SupplierPart
+    tiles.add(
+      ListTile(
+        title: Text(L10().availableStock),
+        leading: Icon(TablerIcons.packages),
+        trailing: LinkIcon(
+          text: simpleNumberString(widget.supplierPart.inStock),
+        ),
+        onTap: () {
+          Navigator.push(
+            context,
+            MaterialPageRoute(
+              builder: (context) => StockItemList({
+                "in_stock": "true",
+                "supplier_part": widget.supplierPart.pkString,
+              }),
+            ),
+          );
+        },
+      ),
+    );
+
     // Supplier details
     tiles.add(
       ListTile(
@@ -196,7 +220,7 @@ class _SupplierPartDisplayState
 
       tiles.add(
         ListTile(
-          title: Text(L10().manufacturerPartNumber),
+          title: Text(L10().manufacturerPart),
           subtitle: Text(widget.supplierPart.MPN),
           leading: Icon(TablerIcons.hash, color: COLOR_ACTION),
           trailing: LinkIcon(),