feat: top-level nav and chat list view

chat/templates/chat_list.html

@@ -0,0 +1,26 @@
+{% extends "layout.html" %}
+{% block title %}Chats - chat{% endblock %}
+{% block content %}
+<header class="page-header">
+  <h1>Chats</h1>
+  <a class="btn" href="/bots/new">+ New bot</a>
+</header>
+{% if chats %}
+<ul class="chat-list">
+  {% for chat in chats %}
+  <li class="chat-row">
+    <a href="/chats/{{ chat.id }}">
+      <div class="chat-row-name">{{ chat.host_bot_name }}</div>
+      <div class="chat-row-snippet muted">{{ chat.last_message_snippet or '—' }}</div>
+      <div class="chat-row-meta muted">
+        <span>{{ chat.time }}</span>
+        {% if chat.last_played_at %}<span>· {{ chat.last_played_at }}</span>{% endif %}
+      </div>
+    </a>
+  </li>
+  {% endfor %}
+</ul>
+{% else %}
+<p class="muted">No chats yet. <a href="/bots/new">Create a bot</a> to start.</p>
+{% endif %}
+{% endblock %}