subcategories implemented and working now

src/controllers/shop.rs

@@ -51,7 +51,7 @@ async fn category_sidebar(
         &v,
         "shop/_sidebar.html",
         json!({
-            "category_tree": view::sidebar_rows(&categories::tree(&published)),
+            "category_groups": view::sidebar_groups(&published),
             "lang": current_lang(&jar),
         }),
     )

src/views/shop.rs

@@ -45,12 +45,24 @@ pub fn product_form(product: &products::Model, image: Option<String>) -> Value {
     })
 }
 
-/// Depth-ordered `{ name, slug, depth }` rows for the storefront sidebar,
-/// rendered as an indented flat list.
-pub fn sidebar_rows(tree: &[(categories::Model, usize)]) -> Vec<Value> {
-    tree.iter()
-        .map(|(category, depth)| {
-            json!({ "name": category.name, "slug": category.slug, "depth": depth })
+/// Two-level grouping for the storefront sidebar menu: each top-level category
+/// as `{ name, slug, children: [{ name, slug }] }`, with its direct
+/// subcategories nested under `children` (empty when the category has none).
+/// Siblings are ordered by position then name on both levels.
+pub fn sidebar_groups(categories: &[categories::Model]) -> Vec<Value> {
+    let mut top: Vec<&categories::Model> = categories
+        .iter()
+        .filter(|c| c.parent_id.is_none())
+        .collect();
+    top.sort_by(|a, b| a.position.cmp(&b.position).then_with(|| a.name.cmp(&b.name)));
+
+    top.into_iter()
+        .map(|category| {
+            let children: Vec<Value> = crate::models::categories::children_of(categories, category.id)
+                .into_iter()
+                .map(|child| json!({ "name": child.name, "slug": child.slug }))
+                .collect();
+            json!({ "name": category.name, "slug": category.slug, "children": children })
         })
         .collect()
 }