统一结账押金字段为押金赔付扣除

号主修正去掉无效的其他押金扣款，仅保留押金赔付扣除；
前后端与账单文案统一，修正时 other 与 deduct 对齐。

backend/internal/modules/dispute/arbitration.go

@@ -337,7 +337,7 @@ func buildArbitrationHandoffContent(req ArbitrateRequest, settlement arbitration
 		content += "\n结算给号主：" + money.FormatWithSymbol(settlement.OwnerIncomeAmountCent)
 	}
 	if settlement.DepositDeductAmountCent > 0 {
-		content += "\n押金扣除：" + money.FormatWithSymbol(settlement.DepositDeductAmountCent)
+		content += "\n押金赔付扣除：" + money.FormatWithSymbol(settlement.DepositDeductAmountCent)
 	}
 	return content
 }