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d456bd23e0
Silently ignored DB errors in handlers could cause data loss (frontier point transactions completing without DB writes), reward duplication (stamp exchange granting items on failed UPDATE), and crashes (tower mission page=0 causing index-out-of-bounds). House access state defaulting to 0 on DB failure also bypassed all access controls. HIGH risk fixes: - frontier point buy/sell now fails with ACK on DB error - stamp exchange/stampcard abort on failed UPDATE - guild meal INSERT returns fail ACK instead of orphaned ID 0 - mercenary/airou creation aborts on failed sequence nextval MEDIUM risk fixes: - tower mission page clamped to >= 1 preventing array underflow - tower RP donation returns early on failed guild state read - house state defaults to 2 (password-protected) on DB failure - playtime read failure logged instead of silently resetting RP Also cache userID on Session at login time, eliminating ~25 redundant subqueries of the form WHERE u.id=(SELECT c.user_id FROM characters c WHERE c.id=$1) across shop, gacha, command, and distitem handlers.