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。

frontend/src/features/orders/composables/useOrderActions.ts

@@ -92,7 +92,6 @@ export interface CheckoutFormState {
 export interface CounterFormState {
   consumableAmountYuan: number
   coin_consumed_m: number
-  otherAmountYuan: number
   depositDeductAmountYuan: number
   reason: string
   evidenceText: string
@@ -112,7 +111,6 @@ function createCounterForm(): CounterFormState {
   return {
     consumableAmountYuan: 0,
     coin_consumed_m: 0,
-    otherAmountYuan: 0,
     depositDeductAmountYuan: 0,
     reason: '',
     evidenceText: '',
@@ -395,7 +393,8 @@ export function useOrderActions(options: UseOrderActionsOptions) {
         content: reasonText,
         consumableAmountYuan: counterForm.value.consumableAmountYuan,
         coin_consumed_m: counterForm.value.coin_consumed_m,
-        otherAmountYuan: counterForm.value.otherAmountYuan,
+        // 号主修正只保留「押金赔付扣除」；与 other 同步写入，兼容旧字段语义
+        otherAmountYuan: counterForm.value.depositDeductAmountYuan,
         depositDeductAmountYuan: counterForm.value.depositDeductAmountYuan,
         reason: reasonText,
         evidence_urls: linesToList(counterForm.value.evidenceText),