Fix white bar and implement instant particle clearing on zoom

White bar elimination:
- Removed all attribution controls (.leaflet-control-attribution)
- Disabled scale control and .leaflet-bottom elements
- Set empty attribution strings for all tile layers
- Clean map bottom edge without distracting white bar

Instant zoom particle clearing:
- Particles now clear INSTANTLY on zoomstart event (not zoomend)
- Particles also clear INSTANTLY on movestart for panning
- Eliminates disorienting particle lag during zoom transitions
- Smooth user experience with immediate visual feedback

Map improvements:
- Switched from fixed 600px to responsive 80vh height
- Custom tile layers without attribution text
- No scale control or bottom attribution bar

Result: Clean map interface with instant particle responses
during all zoom and pan operations for better UX.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

app.py

@@ -606,6 +606,14 @@ def create_wind_map(region="global", forecast_mode=False):
             height: 95vh !important;
         }
     }
+    
+    /* Hide white attribution bar at bottom */
+    .leaflet-control-attribution {
+        display: none !important;
+    }
+    .leaflet-bottom {
+        display: none !important;
+    }
     </style>
     """
     m.get_root().html.add_child(Element(velocity_css))
@@ -1038,8 +1046,9 @@ def create_wind_map(region="global", forecast_mode=False):
             }});
             
             map.on('zoomstart', function() {{
-                console.log("📌 ZOOM START: Particles staying in place during zoom...");
-                // Do NOT clear particles - let them stay in place during zoom
+                console.log("⚡ ZOOM START: Clearing particles INSTANTLY...");
+                // INSTANT particle clearing on zoom start to prevent disorientation
+                clearAllParticles();
             }});
             
             // Unified instant clearing for both pan and zoom