refactor(ui): [UI8] 补齐全局异常卡片边距并统一剩余下拉表单样式

client/src/pages/reimbursement-detail/ReimbursementActions.tsx

@@ -95,7 +95,7 @@ export function ReimbursementActions({
             value={paymentDate}
           />
           <select
-            className="h-11 w-full rounded-lg border border-zinc-300 bg-white px-3 py-2 text-sm"
+            className="select-std"
             data-testid="reimbursement-pay-channel"
             onChange={(event) =>
               setPaymentChannel(event.target.value as PaymentChannel)

client/src/pages/reimbursement-detail/ReimbursementItemEditor.tsx

@@ -78,7 +78,7 @@ export function ReimbursementItemEditor({
             费用类型
           </label>
           <select
-            className="h-11 w-full rounded-lg border border-zinc-300 bg-white px-3 py-2 text-sm"
+            className="select-std"
             data-testid="reimbursement-item-expense-type"
             disabled={expenseTypes.length === 0 || isPending}
             id="expenseTypeId"