refactor(web): 采用 Button/Card 原语替换多处手搓样式

apps/web/components/style/StyleUpload.tsx

@@ -8,6 +8,7 @@ import { Button } from "@/components/ui/Button";
 import { Field } from "@/components/ui/Field";
 import { StatusNote } from "@/components/ui/StatusNote";
 import { TextArea } from "@/components/ui/TextArea";
+import { buttonClass } from "@/lib/ui/variants";
 
 interface StyleUploadProps {
   busy: boolean;
@@ -76,7 +77,7 @@ export function StyleUpload({
       </Field>
 
       <div className="flex items-center gap-3">
-        <label className="cursor-pointer rounded border border-line px-3 py-1.5 text-sm text-ink hover:border-cinnabar hover:text-cinnabar">
+        <label className={buttonClass({ variant: "secondary", className: "cursor-pointer" })}>
           选择文本文件
           <input
             type="file"