feat:加上 Vue 学习站与可嵌入机芯

站点按 bloub 三栏做自定义、动画时间线和设置，支持序列导出。
形体只留常见几种并配中文名；动画页右栏拉满时间线旁空位，滚动条隐藏。
机芯补 GROK.create / <grok-bot>，以及暂停冻结。

index.html

@@ -0,0 +1,18 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>study — spring character</title>
+    <meta
+      name="description"
+      content="Unofficial study of a spring-driven character engine. Site layout after bloub; motion from the replica engine."
+    />
+    <meta name="theme-color" content="#f9f9f9" media="(prefers-color-scheme: light)" />
+    <meta name="theme-color" content="#0a0a0c" media="(prefers-color-scheme: dark)" />
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.ts"></script>
+  </body>
+</html>