Fix UI overlap with OS nav bar/buttons

lib/widgets/add_node_sheet.dart

@@ -51,10 +51,7 @@ class AddNodeSheet extends StatelessWidget {
           }
         }
 
-        return Padding(
-          padding:
-              EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
-          child: Column(
+        return Column(
             mainAxisSize: MainAxisSize.min,
             children: [
               const SizedBox(height: 12),
@@ -192,7 +189,6 @@ class AddNodeSheet extends StatelessWidget {
               ),
               const SizedBox(height: 20),
             ],
-          ),
         );
       },
     );

lib/widgets/edit_node_sheet.dart

@@ -53,10 +53,7 @@ class EditNodeSheet extends StatelessWidget {
           }
         }
 
-        return Padding(
-          padding:
-              EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
-          child: Column(
+        return Column(
             mainAxisSize: MainAxisSize.min,
             children: [
               const SizedBox(height: 12),
@@ -199,7 +196,6 @@ class EditNodeSheet extends StatelessWidget {
               ),
               const SizedBox(height: 20),
             ],
-          ),
         );
       },
     );

lib/widgets/map_view.dart

@@ -525,13 +525,16 @@ class MapViewState extends State<MapView> {
         ),
 
         // All map overlays (mode indicator, zoom, attribution, add pin)
-        MapOverlays(
-          mapController: _controller.mapController,
-          uploadMode: appState.uploadMode,
-          session: session,
-          editSession: editSession,
-          attribution: appState.selectedTileType?.attribution,
-          onSearchPressed: widget.onSearchPressed,
+        MediaQuery(
+          data: MediaQuery.of(context).copyWith(viewInsets: EdgeInsets.zero),
+          child: MapOverlays(
+            mapController: _controller.mapController,
+            uploadMode: appState.uploadMode,
+            session: session,
+            editSession: editSession,
+            attribution: appState.selectedTileType?.attribution,
+            onSearchPressed: widget.onSearchPressed,
+          ),
         ),
 
         // Network status indicator (top-left) - conditionally shown