Add export for all system default tasks

app/modules/services/ui.py

@@ -24,6 +24,7 @@ from app.modules.services.bulk_imports import (
     import_due_date_extensions,
 )
 from app.modules.services.catalogue_export import build_service_catalogue_export
+from app.modules.services.default_tasks_export import build_default_tasks_export
 from app.modules.services.due_dates import (
     DUE_PERIOD_TYPES,
     DUE_YEAR_BASIS_CHOICES,
@@ -1009,6 +1010,28 @@ def default_templates_catalogue_list(request: Request):
         db.close()
 
 
+@router.get('/defaults/export')
+def default_tasks_export(request: Request):
+    db = CommonSessionLocal()
+    try:
+        user = get_current_user(request, db=db)
+        if not user:
+            return RedirectResponse(url='/login', status_code=303)
+        require_permission(db, user, 'service_tasks.view')
+        if not _is_system_admin(db, user):
+            return _redirect_denied()
+
+        workbook_bytes = build_default_tasks_export(db)
+        filename = f"system_default_tasks_export_{datetime.now(timezone.utc).strftime('%Y%m%d_%H%M%S')}.xlsx"
+        return StreamingResponse(
+            iter([workbook_bytes]),
+            media_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+            headers={'Content-Disposition': f'attachment; filename="{filename}"'},
+        )
+    finally:
+        db.close()
+
+
 @router.get('/catalogue/{catalogue_id}/defaults')
 def default_templates_detail(request: Request, catalogue_id: int):
     db = CommonSessionLocal()