feat(web): shared sv/en LabelEditor

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/src/i18n/en.json

@@ -7,6 +7,7 @@
   "visibility": { "draft": "Draft", "internal": "Internal", "public": "Public" },
   "form": { "selectPlaceholder": "— select —", "create": "Create object", "save": "Save", "cancel": "Cancel", "visibility": "Visibility", "draft": "Draft", "internal": "Internal", "required": "This field is required", "rejected": "The server rejected the changes — check required and referenced fields", "flexibleHeading": "Catalogue fields" },
   "actions": { "edit": "Edit", "delete": "Delete", "confirmDelete": "Delete this object? This cannot be undone." },
+  "labels": { "en": "Label (EN)", "sv": "Label (SV)", "externalUri": "External URI (optional)" },
   "publish": {
     "heading": "Visibility",
     "advanceInternal": "Advance to internal",