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/ReimbursementsPage.tsx

@@ -95,7 +95,7 @@ export function ReimbursementsPage() {
           <div className="flex flex-col gap-2 sm:flex-row sm:items-center">
             {showProxyOwnerSelector ? (
               <select
-                className="h-11 rounded-lg border border-zinc-300 bg-white px-3 py-2 text-sm"
+                className="select-std"
                 data-testid="reimbursements-owner-select"
                 onChange={(event) => setProxyOwnerEmployeeId(event.target.value)}
                 value={proxyOwnerEmployeeId}