统一PC前端布局密度（05-28-pc-frontend-layout-unification）

client/src/pages/ReimbursementsPage.tsx

@@ -838,7 +838,7 @@ export function ReimbursementsPage() {
 
       {batchMode ? (
         <div className="fixed bottom-6 left-1/2 z-40 w-[min(760px,calc(100vw-2rem))] -translate-x-1/2">
-          <div className="rounded-2xl border border-zinc-200 bg-white p-4 shadow-lg">
+          <div className="rounded-lg border border-zinc-200 bg-white p-3.5 shadow-lg">
             <div className="flex flex-col gap-3 md:flex-row md:items-center md:justify-between">
               <div className="text-sm text-zinc-700">已选 {selectedItems.length} 项可处理报销待办</div>
               <div className="flex flex-wrap items-center gap-2">
@@ -869,7 +869,7 @@ export function ReimbursementsPage() {
           </DialogHeader>
 
           <div className="space-y-4">
-            <div className="rounded-2xl border border-zinc-200 bg-zinc-50 p-4 text-sm text-zinc-700">
+            <div className="rounded-lg border border-zinc-200 bg-zinc-50 p-3.5 text-sm text-zinc-700">
               共 {selectedItems.length} 项：
               <div className="mt-2 max-h-40 space-y-1 overflow-auto">
                 {selectedItems.map((item) => (
@@ -923,9 +923,9 @@ export function ReimbursementsPage() {
             </DialogDescription>
           </DialogHeader>
 
-          <div className="max-h-[60vh] space-y-2 overflow-auto rounded-2xl border border-zinc-200 bg-zinc-50 p-4">
+          <div className="max-h-[60vh] space-y-2 overflow-auto rounded-lg border border-zinc-200 bg-zinc-50 p-3.5">
             {batchResult?.results.map((item) => (
-              <div key={`${item.taskId}-${item.outcome}`} className="rounded-xl border border-zinc-200 bg-white px-4 py-3">
+              <div key={`${item.taskId}-${item.outcome}`} className="rounded-lg border border-zinc-200 bg-white px-4 py-3">
                 <div className="flex flex-col gap-2 md:flex-row md:items-center md:justify-between">
                   <div>
                     <div className="font-medium text-zinc-900">