Storm cards show live GOES infrared satellite; replace the dead RainViewer satellite toggle

RainViewer's satellite feed is empty, so the Clouds toggle never drew anything and ground
radar doesn't reach open ocean. Use NASA GIBS GOES-West/East infrared tiles instead,
auto-enabled when flying to a storm, default off otherwise.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

app/public/index.html

@@ -292,7 +292,7 @@
               </span>
             </label>
             <label class="toggle-control">
-              <span class="toggle-label">☁️ Clouds</span>
+              <span class="toggle-label">🛰 Satellite (IR)</span>
               <span class="switch-toggle">
                 <input type="checkbox" id="toggle-satellite" data-layer="satellite">
                 <span class="toggle-slider"></span>