Initial commit: LiveStream Platform

Backend: FastAPI + SQLAlchemy + SQLite
Frontend: React + Vite + Ant Design (serif Anthropic theme)
Media server: MediaMTX with edge node support
Load balancing: round-robin / weighted / least-conn
Multicast detection with automatic fallback
Transcoding support via FFmpeg (configurable quality)
hls.js player with line & quality switching
Admin panel with password auth
Windows compatible scripts

frontend/index.html

@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>LiveStream Platform</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,500;0,8..60,600;1,8..60,400&display=swap" rel="stylesheet" />
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>