feat(furni-editor): sync empty public_name from furnidata name

When a furni has a matching furnidata entry with a display name but its
items_base.public_name (the DB fallback) is empty, the editor now shows a
'Sync from furnidata' button next to the Public Name field. It reuses the
generic item update (a partial { publicName } payload) to fill the DB column
from the stored furnidata name, so the read-only fallback stops being blank.
Button shows only when the entry's classname matches, the DB field is empty,
and the furnidata name is present; it disappears after the sync re-fetch.

src/hooks/furni-editor/useFurniEditor.ts

@@ -291,6 +291,17 @@ export const useFurniEditor = () =>
         SendMessageComposer(new FurniEditorRevertFurnidataComposer(id));
     }, []);
 
+    // Fill an empty items_base.public_name from the furnidata display name. Reuses
+    // the generic item update (a partial { publicName } payload is accepted), so the
+    // existing 'update' result path shows the toast and re-fetches the detail.
+    const syncPublicName = useCallback((id: number, name: string) =>
+    {
+        setLoading(true);
+        setError(null);
+        pendingActionRef.current = { action: 'update', itemId: id };
+        SendMessageComposer(new FurniEditorUpdateComposer(id, JSON.stringify({ publicName: name })));
+    }, []);
+
     const importText = useCallback((id: number) =>
     {
         setLoading(true);
@@ -323,6 +334,6 @@ export const useFurniEditor = () =>
         selectedItem, setSelectedItem, catalogItems, furniDataEntry, furniDataDiagnostic,
         interactions,
         searchItems, loadDetail, loadBySpriteId, updateItem, deleteItem, loadInteractions,
-        updateFurnidata, revertFurnidata, importText, importResult
+        updateFurnidata, revertFurnidata, syncPublicName, importText, importResult
     };
 };