feat: add manual 'verify & fix all interactions' admin tool

New POST /api/admin/import/furni/verify re-runs the full interaction
verification over items_base at any time, plus a Tools dropdown entry
in the furni import admin. It corrects interaction_type,
interaction_modes_count and allow_sit/lay/walk against real furniture
data (furnidata flags + .nitro animation states); items without real
data are skipped and existing emulator handler types are preserved.

src/app/api/admin/import/furni/verify/route.ts

@@ -0,0 +1,18 @@
+import { withAdmin } from "@/lib/api-handler";
+import { apiOk } from "@/lib/api-response";
+import { PERMS } from "@/lib/permissions";
+import { verifyAndFixInteractionModesCount } from "@/lib/services/furni-import";
+
+/**
+ * POST /api/admin/import/furni/verify
+ *
+ * Re-runs the interaction verification over the ENTIRE items_base table,
+ * correcting interaction_type, interaction_modes_count and allow_sit/
+ * allow_lay/allow_walk against the real furniture data (furnidata flags +
+ * .nitro animation states). Only items with authoritative data are touched —
+ * no keyword guesses, so no false positives.
+ */
+export const POST = withAdmin({ permission: PERMS.ASSETS_IMPORT }, async () => {
+	const result = await verifyAndFixInteractionModesCount();
+	return apiOk(result);
+});