search notify where we are searching

src/controllers/shop.rs

@@ -250,6 +250,13 @@ async fn run_search(
         // Numeric form so the <select> can mark the active option (Tera can't
         // compare a string param against a numeric category id).
         "selected_category_id": selected_category.parse::<i32>().unwrap_or(-1),
+        // Display name of the active category, so the search bar can show that
+        // the query is scoped to it. `None` for "all"/"none" (the template maps
+        // "none" to the localized "uncategorized" label itself).
+        "selected_category_name": selected_category
+            .parse::<i32>()
+            .ok()
+            .and_then(|id| category_name.get(&id).cloned()),
         "uncategorized_count": uncategorized_count,
         "sort": sort,
         "per_page": per_page,