Improve MineGeo exploration and mapping features

supabase/migrations/20261005065029_withdraw_contribution.sql

@@ -0,0 +1,16 @@
+create function public.withdraw_contribution(p_dataset uuid,p_owner uuid) returns void
+language plpgsql security invoker set search_path='' as $$
+declare parent uuid; d public.datasets;
+begin
+ select parent_dataset_id into parent from public.datasets where id=p_dataset and owner_id=p_owner;
+ if parent is null then raise exception 'Contribution not found'; end if;
+ perform 1 from public.datasets where id=parent for update;
+ -- Match the worker's job-before-dataset lock order.
+ perform 1 from public.upload_jobs where dataset_id=p_dataset for update;
+ select * into d from public.datasets where id=p_dataset and owner_id=p_owner for update;
+ if d.contribution_status not in ('pending','submitted') then raise exception 'Only pending contributions can be withdrawn'; end if;
+ update public.upload_jobs set state='cancelled',updated_at=now() where dataset_id=p_dataset and state in ('queued','running');
+ update public.datasets set state='failed',contribution_status='rejected',rejection_reason='Withdrawn by contributor',updated_at=now() where id=p_dataset;
+end; $$;
+revoke execute on function public.withdraw_contribution(uuid,uuid) from public,anon,authenticated;
+grant execute on function public.withdraw_contribution(uuid,uuid) to service_role;