fix : use name parameter for API search filter

- Fix missing <template> tag in product/create.vue causing build error
- Preserve constructeurIds when product already has constructeurs loaded

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/services/modelTypes.ts

@@ -128,7 +128,7 @@ export async function listModelTypes(params: ModelTypeListParams = {}, opts: { s
   const query: Record<string, string | number> = {};
 
   if (params.q) {
-    query.q = params.q;
+    query.name = params.q;
   }
   if (params.category) {
     query.category = params.category;