feat: introduce PolyWeather web map application with FastAPI backend and Leaflet frontend.

web/static/index.html

@@ -5,7 +5,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>PolyWeather — 天气衍生品智能地图</title>
-    <meta name="description" content="Polymarket 天气衍生品交易智能地图。实时 METAR、DEB 融合预报与 AI 分析。">
+    <meta name="description" content="PolyWeather 天气衍生品智能地图。实时 METAR、MGM、DEB 融合预报与 AI 分析。">
 
     <!-- Leaflet -->
     <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
@@ -140,13 +140,6 @@
         </div>
     </aside>
 
-    <!-- ── Polymarket Floating Widget ── -->
-    <div id="marketFloatingWidget" class="market-floating hidden">
-        <div class="market-widget-header">
-            <h3>📈 Polymarket</h3>
-            <button class="market-close" id="marketClose">✕</button>
-        </div>
-        <div id="marketOdds" class="market-odds"></div>
     </div>
 
     <!-- ── Loading Overlay ── -->