feat: add Vue.js WebUI — YesPlayMusic-inspired SPA with all pages and components

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/index.html

@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>TSMusicBot</title>
+  <link rel="preconnect" href="https://fonts.googleapis.com">
+  <link href="https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700;800&display=swap" rel="stylesheet">
+</head>
+<body>
+  <div id="app"></div>
+  <script type="module" src="/src/main.ts"></script>
+</body>
+</html>