reshuffle, use -vanilla consistently

examples/simple-host/example-host.html

@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-    <head>
-        <meta charset="UTF-8">
-        <meta name="viewport" content="width=device-width, initial-scale=1.0">
-        <style>
-            #chat-root {
-                display: flex;
-                flex-direction: column;
-            }
-        </style>
-        <script src="/src/example-host.ts" type="module"></script>
-        <title>Example MCP View Host</title>
-    </head>
-    <body>
-        <h1>Example MCP View Host</h1>
-
-        <div id="controls"></div>
-        <div id="chat-root"></div>
-    </body>
-</html>