feat(digital-human): 头部标题改为「短视频工厂/数字人」,去掉 Pixelle 副标题

Co-Authored-By: Claude <noreply@anthropic.com>

src/web/pages/DigitalHuman.tsx

@@ -861,9 +861,8 @@ export default function DigitalHuman() {
     <div className="digital-human-page animate-fade-in">
       <section className="console-hero">
         <div className="console-hero-copy">
-          <span className="console-kicker">Digital Human</span>
+          <span className="console-kicker">Short Video Studio</span>
-          <h1>数字人</h1>
+          <h1>短视频工厂/数字人</h1>
-          <p>基于 Pixelle-Video，串联图像、TTS、模板与 BGM，一句主题自动产出口播短片。</p>
         </div>
         <div className="console-hero-rail" aria-label="数字人摘要">
           <div>