feat(web): PublishControl stepper (legal one-step moves, confirm-on-public, gate/illegal errors)

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

web/src/i18n/en.json

@@ -6,5 +6,18 @@
   "fieldsLabels": { "objectNumber": "Object number", "objectName": "Name", "count": "Number of objects", "briefDescription": "Brief description", "currentLocation": "Current location", "currentOwner": "Current owner", "recorder": "Recorder", "recordingDate": "Recording date", "visibility": "Visibility", "flexible": "Catalogue fields" },
   "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." }
+  "actions": { "edit": "Edit", "delete": "Delete", "confirmDelete": "Delete this object? This cannot be undone." },
+  "publish": {
+    "heading": "Visibility",
+    "advanceInternal": "Advance to internal",
+    "publish": "Publish →",
+    "backToDraft": "← Back to draft",
+    "unpublishInternal": "Unpublish to internal",
+    "confirmTitle": "Publish to public?",
+    "confirmBody": "This will make the record visible on the public API.",
+    "confirm": "Publish",
+    "gateError": "Can't publish — required fields are missing.",
+    "editLink": "Edit the record",
+    "illegalError": "That visibility change isn't allowed."
+  }
 }