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/UserManagementPage.tsx

@@ -189,7 +189,7 @@ export function UserManagementPage() {
             placeholder="搜索工号/姓名/手机号/邮箱"
           />
           <select
-            className="h-11 rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm"
+            className="h-11 rounded-lg border border-zinc-300 bg-white px-3 py-2 text-sm"
             data-testid="users-status-filter"
             value={status}
             onChange={(e) => {
@@ -216,7 +216,7 @@ export function UserManagementPage() {
           </p>
         ) : null}
 
-        <div className="rounded-lg border border-slate-200">
+        <div className="rounded-lg border border-zinc-200">
           <Table data-testid="users-table">
             <TableHeader>
               <tr>
@@ -232,14 +232,14 @@ export function UserManagementPage() {
                 listQuery.data?.items.map((item) => (
                   <TableRow data-testid="users-row" key={item.id}>
                     <TableCell>
-                      <div className="font-medium text-slate-900">
+                      <div className="font-medium text-zinc-900">
                         {item.employeeNo} / {item.name}
                       </div>
-                      <div className="text-xs text-slate-500 font-mono">{item.id}</div>
+                      <div className="text-xs text-zinc-500 font-mono">{item.id}</div>
                     </TableCell>
                     <TableCell className="text-sm">
                       <div>{item.email}</div>
-                      <div className="text-slate-500">{item.phone}</div>
+                      <div className="text-zinc-500">{item.phone}</div>
                     </TableCell>
                     <TableCell><StatusBadge status={item.status} /></TableCell>
                     <TableCell className="text-xs">{formatRoleCodes(item.roleCodes)}</TableCell>
@@ -283,7 +283,7 @@ export function UserManagementPage() {
                 ))
               ) : (
                 <TableRow>
-                  <TableCell colSpan={5} className="py-3 text-slate-500">
+                  <TableCell colSpan={5} className="py-3 text-zinc-500">
                     暂无数据
                   </TableCell>
                 </TableRow>