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/MobileCapturePage.tsx

@@ -142,7 +142,7 @@ export function MobileCapturePage() {
 
       <Card className="space-y-3 p-4">
         <div className="flex items-center justify-between">
-          <h3 className="text-base font-semibold text-slate-900">拍照/选择文件</h3>
+          <h3 className="text-base font-semibold text-zinc-900">拍照/选择文件</h3>
           <span className={isOnline ? "text-emerald-600" : "text-orange-600"}>
             {isOnline ? "在线" : "离线"}
           </span>
@@ -160,7 +160,7 @@ export function MobileCapturePage() {
           type="file"
         />
 
-        <div className="text-sm text-slate-600">
+        <div className="text-sm text-zinc-600">
           当前文件：{selectedFile ? `${selectedFile.name} (${Math.ceil(selectedFile.size / 1024)} KB)` : "未选择"}
         </div>
 
@@ -216,20 +216,20 @@ export function MobileCapturePage() {
 
       <Card className="space-y-3 p-4" data-testid="mobile-capture-queue">
         <div className="flex items-center justify-between">
-          <h3 className="text-base font-semibold text-slate-900">离线上传队列</h3>
-          <span className="text-sm text-slate-500">{queuedCountLabel}</span>
+          <h3 className="text-base font-semibold text-zinc-900">离线上传队列</h3>
+          <span className="text-sm text-zinc-500">{queuedCountLabel}</span>
         </div>
 
-        {queueQuery.isLoading ? <div className="flex items-center gap-2 text-sm text-slate-500"><Spinner size="sm" />加载中...</div> : null}
+        {queueQuery.isLoading ? <div className="flex items-center gap-2 text-sm text-zinc-500"><Spinner size="sm" />加载中...</div> : null}
 
         {!queueQuery.isLoading && queuedItems.length === 0 ? (
-          <p className="text-sm text-slate-500">暂无待上传文件。</p>
+          <p className="text-sm text-zinc-500">暂无待上传文件。</p>
         ) : null}
 
         {queuedItems.map((item) => (
-          <div key={item.id} className="rounded-lg border border-slate-200 px-3 py-2 text-sm">
-            <div className="font-medium text-slate-800">{item.fileName}</div>
-            <div className="text-slate-500">创建时间：{formatTime(item.createdAt)}</div>
+          <div key={item.id} className="rounded-lg border border-zinc-200 px-3 py-2 text-sm">
+            <div className="font-medium text-zinc-800">{item.fileName}</div>
+            <div className="text-zinc-500">创建时间：{formatTime(item.createdAt)}</div>
             <div className="mt-2">
               <Button
                 data-testid={`mobile-capture-remove-${item.id}`}