feat(dashboard): add paper/live toggle

- /api/live endpoint serves copybot_live_real.json (live bot feed)
- Toggle button switches between paper (/api/feed) and live (/api/live)
- Live mode shows red button label for visual distinction

live/bot_dashboard.html

@@ -53,8 +53,9 @@ footer{text-align:center;color:var(--dim);font-size:12px;margin-top:30px}
   <h1>Polymarket 跟单 Bot · 实时</h1>
   <div class="sub">
     <span class="live-dot"></span><span id="status">连接中…</span>
-    · 数据更新于 <span id="updated">—</span>
+    · 数据更新于 <span id="updated">-</span>
     · 浏览器每 30 秒自动拉取
+    · <button id="toggle-mode" onclick="toggleMode()" style="background:var(--line);color:var(--fg);border:1px solid var(--line);border-radius:4px;padding:3px 12px;cursor:pointer;font-size:12px;">PAPER</button>
   </div>
 
   <div class="cards">
@@ -102,8 +103,19 @@ footer{text-align:center;color:var(--dim);font-size:12px;margin-top:30px}
 </div>
 
 <script>
+let currentMode = 'paper';
+function toggleMode() {
+  currentMode = currentMode === 'paper' ? 'live' : 'paper';
+  const btn = document.getElementById('toggle-mode');
+  btn.textContent = currentMode.toUpperCase();
+  btn.style.background = currentMode === 'live' ? '#3a1a1a' : 'var(--line)';
+  btn.style.color = currentMode === 'live' ? 'var(--red)' : 'var(--fg)';
+  render();
+}
+
 async function fetchFeed() {
-  const r = await fetch('/api/feed', {cache: 'no-store'});
+  const endpoint = currentMode === 'live' ? '/api/live' : '/api/feed';
+  const r = await fetch(endpoint, {cache: 'no-store'});
   if (!r.ok) throw new Error('HTTP ' + r.status);
   return await r.json();
 }

live/serve_dashboard.py

@@ -34,7 +34,10 @@ class Handler(http.server.SimpleHTTPRequestHandler):
         if self.path in ("/", "/bot.html"):
             self.path = "/bot_dashboard.html"
         elif self.path == "/api/feed":
-            self._serve_json("copybot_live.json", "feed")
+            self._serve_json("copybot_live.json", "paper feed")
+            return
+        elif self.path == "/api/live":
+            self._serve_json("copybot_live_real.json", "live feed")
             return
         elif self.path == "/api/portfolio":
             self._serve_json("portfolio.json", "portfolio")