units,lesson as standalone

controllers/admin/lessons.controller.js

@@ -66,6 +66,19 @@ const LESSON_LIST_COMPUTED = [
       WHERE ul.lesson_id = "Lesson"."lesson_id"
     )`,
   },
+  {
+    key: "course_bound",
+    label: "Course Status",
+    type: "boolean",
+    literal: `(
+      SELECT EXISTS (
+        SELECT 1
+        FROM unit_lessons ul
+        JOIN course_units cu ON cu.unit_id = ul.unit_id
+        WHERE ul.lesson_id = "Lesson"."lesson_id"
+      )
+    )`,
+  },
 ];
 
 // ══════════════════════════════════════════════════════════════════════════════
@@ -101,6 +114,11 @@ exports.getLessonsFlat = async (req, res) => {
           WHERE ul.lesson_id = l.lesson_id)                   AS unit_count
       FROM lessons l
       WHERE l."deletedAt" IS NULL
+        AND NOT EXISTS (
+          SELECT 1 FROM unit_lessons ul2
+            JOIN course_units cu ON cu.unit_id = ul2.unit_id
+          WHERE ul2.lesson_id = l.lesson_id
+        )
       ORDER BY l.title ASC
     `, { type: sequelize.QueryTypes.SELECT });
     return R.success(res, "Lessons retrieved.", rows);