Restyle index table.

web/index.html

@@ -6,6 +6,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
     <link rel="modulepreload" href="/pkg/package.js" as="script" type="text/javascript">
     <link rel="preload" href="/pkg/package_bg.wasm" as="fetch" type="application/wasm" crossorigin="anonymous">
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.9.4/css/bulma.min.css">
 <style>
 .message {
   padding-left: 0.5em;
@@ -23,6 +24,11 @@ iframe {
   height: 100%;
   width: 100%;
 }
+.index .from {
+  width: 200px;
+}
+.index .subject {
+}
 </style>
 </head>