Fix missing CSRF tokens in all delete forms

- Added @Html.AntiForgeryToken() to Products delete form
- Added @Html.AntiForgeryToken() to Categories delete form
- Added @Html.AntiForgeryToken() to Users delete form
- Added @Html.AntiForgeryToken() to ShippingRates delete form
- Added @Html.AntiForgeryToken() to Product Variations delete form

This fixes the 400 Bad Request errors when trying to delete items

.claude/settings.local.json

@@ -30,7 +30,9 @@
       "Bash(tasklist)",
       "Bash(findstr:*)",
       "Read(//mnt/c/Production/Source/SilverLABS/SilverPAY/**)",
-      "Bash(git commit:*)"
+      "Bash(git commit:*)",
+      "Bash(docker build:*)",
+      "Bash(git fetch:*)"
     ],
     "deny": [],
     "ask": []