fix(ui): [UI7-2] 统一全局 Design Tokens，移除冗余字体，修复异常色值引用

client/src/pages/WorkflowTaskDetailPage.tsx

@@ -157,7 +157,7 @@ export function WorkflowTaskDetailPage() {
       </Card>
 
       <Card className="space-y-4 p-6">
-        <h3 className="text-base font-semibold text-slate-900">审批动作</h3>
+        <h3 className="text-base font-semibold text-zinc-900">审批动作</h3>
 
         {actionError ? (
           <p
@@ -179,8 +179,8 @@ export function WorkflowTaskDetailPage() {
           </Button>
         </div>
 
-        <div className="space-y-2 rounded-lg border border-slate-200 p-4">
-          <p className="text-sm font-medium text-slate-800">驳回</p>
+        <div className="space-y-2 rounded-lg border border-zinc-200 p-4">
+          <p className="text-sm font-medium text-zinc-800">驳回</p>
           <Textarea
             data-testid="workflow-task-reject-comment"
             onChange={(event) => setRejectComment(event.target.value)}
@@ -198,8 +198,8 @@ export function WorkflowTaskDetailPage() {
           </Button>
         </div>
 
-        <div className="space-y-2 rounded-lg border border-slate-200 p-4">
-          <p className="text-sm font-medium text-slate-800">退回</p>
+        <div className="space-y-2 rounded-lg border border-zinc-200 p-4">
+          <p className="text-sm font-medium text-zinc-800">退回</p>
           <Textarea
             data-testid="workflow-task-return-comment"
             onChange={(event) => setReturnComment(event.target.value)}
@@ -217,10 +217,10 @@ export function WorkflowTaskDetailPage() {
           </Button>
         </div>
 
-        <div className="space-y-2 rounded-lg border border-slate-200 p-4">
-          <p className="text-sm font-medium text-slate-800">转审</p>
+        <div className="space-y-2 rounded-lg border border-zinc-200 p-4">
+          <p className="text-sm font-medium text-zinc-800">转审</p>
           <select
-            className="h-11 w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm"
+            className="h-11 w-full rounded-lg border border-zinc-300 bg-white px-3 py-2 text-sm"
             data-testid="workflow-task-transfer-to-approver"
             onChange={(event) => setSelectedApprover(event.target.value)}
             value={selectedApprover}
@@ -256,20 +256,20 @@ export function WorkflowTaskDetailPage() {
       </Card>
 
       <Card className="space-y-3 p-6">
-        <h3 className="text-base font-semibold text-slate-900">处理历史</h3>
+        <h3 className="text-base font-semibold text-zinc-900">处理历史</h3>
         <div className="space-y-2">
           {detail.history.length ? (
             detail.history.map((item) => (
-              <div className="rounded-lg border border-slate-200 px-3 py-2 text-sm" key={item.id}>
-                <div className="font-medium text-slate-900">
+              <div className="rounded-lg border border-zinc-200 px-3 py-2 text-sm" key={item.id}>
+                <div className="font-medium text-zinc-900">
                   {item.action} · {item.actorName || item.actorId}
                 </div>
-                <div className="text-slate-600">{item.comment || "-"}</div>
-                <div className="text-xs text-slate-500">{item.createdAt || "-"}</div>
+                <div className="text-zinc-600">{item.comment || "-"}</div>
+                <div className="text-xs text-zinc-500">{item.createdAt || "-"}</div>
               </div>
             ))
           ) : (
-            <p className="text-sm text-slate-500">暂无历史记录</p>
+            <p className="text-sm text-zinc-500">暂无历史记录</p>
           )}
         </div>
       </Card>