fix: add selectinload and sync fields to search and get_step endpoints

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/api/endpoints/steps.py

@@ -40,7 +40,7 @@ async def get_step_or_404(
         select(StepLibrary).where(
             StepLibrary.id == step_id,
             StepLibrary.is_active == True
-        )
+        ).options(selectinload(StepLibrary.source_tree))
     )
     step = result.scalar_one_or_none()
     if not step:
@@ -157,7 +157,7 @@ async def search_steps(
         StepLibrary.is_active == True,
         build_step_visibility_filter(current_user),
         func.to_tsvector('english', StepLibrary.title).match(search_query)
-    ).order_by(desc(StepLibrary.rating_average)).limit(limit)
+    ).options(selectinload(StepLibrary.source_tree)).order_by(desc(StepLibrary.rating_average)).limit(limit)
 
     result = await db.execute(query)
     steps = result.scalars().all()
@@ -177,6 +177,8 @@ async def search_steps(
             "is_featured": step.is_featured,
             "created_by": step.created_by,
             "created_at": step.created_at,
+            "is_flow_synced": step.is_flow_synced,
+            "source_tree_name": step.source_tree.name if step.source_tree else None,
         }
 
         if step.category_id: