Fix file sharing load speed and move error; misc updates

- Remove recursive directory size calculations (single Seafile API call per list)
- Remove 'Used in this location' usage display
- Fix move using v2 per-type endpoints instead of broken batch endpoint
- Send entry type from frontend for correct move routing

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

supabase/migrations/20260414193000_add_expense_receipts.sql

@@ -0,0 +1,22 @@
+alter table public.expenses
+  add column if not exists receipt_path text,
+  add column if not exists receipt_name text;
+
+insert into storage.buckets (id, name, public)
+values ('expense-receipts', 'expense-receipts', false)
+on conflict (id) do nothing;
+
+drop policy if exists "Team reads expense receipts storage" on storage.objects;
+drop policy if exists "Team inserts expense receipts storage" on storage.objects;
+drop policy if exists "Team updates expense receipts storage" on storage.objects;
+drop policy if exists "Team deletes expense receipts storage" on storage.objects;
+
+create policy "Team reads expense receipts storage" on storage.objects
+  for select to authenticated using (bucket_id = 'expense-receipts' and get_my_role() = 'team');
+create policy "Team inserts expense receipts storage" on storage.objects
+  for insert to authenticated with check (bucket_id = 'expense-receipts' and get_my_role() = 'team');
+create policy "Team updates expense receipts storage" on storage.objects
+  for update to authenticated using (bucket_id = 'expense-receipts' and get_my_role() = 'team')
+  with check (bucket_id = 'expense-receipts' and get_my_role() = 'team');
+create policy "Team deletes expense receipts storage" on storage.objects
+  for delete to authenticated using (bucket_id = 'expense-receipts' and get_my_role() = 'team');