Fix type mismatch in UnusedDays binding

NULLIF(int, '') fails when prepared statements type the parameter
as integer. Use direct cast since NUMBER input always has a value.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pages/Operations - Unused Items/queries/unused_items/unused_items.txt

@@ -31,5 +31,5 @@ LEFT JOIN (
     GROUP BY isite.itemsite_item_id
 ) last_txn ON last_txn.itemsite_item_id = i.item_id
 WHERE (CURRENT_DATE - COALESCE(last_txn.last_transaction_date, i.item_created, cc.comment_date)::date)
-      >= COALESCE(NULLIF('{{UnusedDays.text}}','')::int, 365)
+      >= '{{UnusedDays.text}}'::int
 ORDER BY "Days Unused" DESC