fix human language quick-create path creation

Create a real sub-category under Human Language and pass sub_category_id when creating the course so the new path renders immediately in the hierarchy panel.

Made-with: Cursor

src/pages/content-management/HumanLanguagePage.tsx

@@ -628,10 +628,20 @@ export function HumanLanguagePage() {
       if (!effectiveCategoryId) {
         throw new Error("Missing human language category id")
       }
-      const title = `${quickSubCategoryName.trim()} - ${quickCourseName.trim()}`
+
+      const createdSubCategory = await createCourseCategory({
+        name: quickSubCategoryName.trim(),
+        parent_id: effectiveCategoryId,
+      })
+      const subCategoryId = createdSubCategory.data?.data?.id
+      if (!subCategoryId) {
+        throw new Error("Failed to create subcategory")
+      }
+
       await createCourse({
         category_id: effectiveCategoryId,
-        title,
+        sub_category_id: Number(subCategoryId),
+        title: quickCourseName.trim(),
         description: `${quickSubCategoryName.trim()} / ${quickCourseName.trim()}`,
       })
       toast.success("Subcategory/course path created")

src/types/course.types.ts

@@ -45,6 +45,7 @@ export interface GetCoursesResponse {
 
 export interface CreateCourseRequest {
   category_id: number
+  sub_category_id?: number | null
   title: string
   description: string
 }