Better handoff from tags to edit sheet

lib/screens/home_screen.dart

@@ -34,6 +34,9 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
   double _addSheetHeight = 0.0;
   double _editSheetHeight = 0.0;
   double _tagSheetHeight = 0.0;
+  
+  // Flag to prevent map bounce when transitioning from tag sheet to edit sheet
+  bool _transitioningToEdit = false;
 
   @override
   void initState() {
@@ -113,6 +116,9 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
     // Disable follow-me when editing a camera so the map doesn't jump around
     appState.setFollowMeMode(FollowMeMode.off);
     
+    // Set transition flag to prevent map bounce
+    _transitioningToEdit = true;
+    
     // Close any existing tag sheet first
     if (_tagSheetHeight > 0) {
       Navigator.of(context).pop();
@@ -120,21 +126,32 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
     
     final session = appState.editSession!;     // should be non-null when this is called
 
-    final controller = _scaffoldKey.currentState!.showBottomSheet(
-      (ctx) => MeasuredSheet(
-        onHeightChanged: (height) {
-          setState(() {
-            _editSheetHeight = height;
-          });
-        },
-        child: EditNodeSheet(session: session),
-      ),
-    );
-    
-    // Reset height when sheet is dismissed
-    controller.closed.then((_) {
-      setState(() {
-        _editSheetHeight = 0.0;
+    // Small delay to let tag sheet close smoothly
+    Future.delayed(const Duration(milliseconds: 150), () {
+      if (!mounted) return;
+      
+      final controller = _scaffoldKey.currentState!.showBottomSheet(
+        (ctx) => MeasuredSheet(
+          onHeightChanged: (height) {
+            setState(() {
+              _editSheetHeight = height;
+              // Clear transition flag and reset tag sheet height once edit sheet starts sizing
+              if (height > 0 && _transitioningToEdit) {
+                _transitioningToEdit = false;
+                _tagSheetHeight = 0.0; // Now safe to reset
+              }
+            });
+          },
+          child: EditNodeSheet(session: session),
+        ),
+      );
+      
+      // Reset height when sheet is dismissed
+      controller.closed.then((_) {
+        setState(() {
+          _editSheetHeight = 0.0;
+          _transitioningToEdit = false;
+        });
       });
     });
   }
@@ -147,15 +164,25 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
             _tagSheetHeight = height;
           });
         },
-        child: NodeTagSheet(node: node),
+        child: NodeTagSheet(
+          node: node,
+          onEditPressed: () {
+            final appState = context.read<AppState>();
+            appState.startEditSession(node);
+            // This will trigger _openEditNodeSheet via the existing auto-show logic
+          },
+        ),
       ),
     );
     
-    // Reset height when sheet is dismissed
+    // Reset height when sheet is dismissed (unless transitioning to edit)
     controller.closed.then((_) {
-      setState(() {
-        _tagSheetHeight = 0.0;
-      });
+      if (!_transitioningToEdit) {
+        setState(() {
+          _tagSheetHeight = 0.0;
+        });
+      }
+      // If transitioning to edit, keep the height until edit sheet takes over
     });
   }
 
@@ -174,7 +201,9 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
     // Pass the active sheet height directly to the map
     final activeSheetHeight = _addSheetHeight > 0 
         ? _addSheetHeight 
-        : (_editSheetHeight > 0 ? _editSheetHeight : _tagSheetHeight);
+        : (_editSheetHeight > 0 
+            ? _editSheetHeight 
+            : _tagSheetHeight);
 
     return MultiProvider(
       providers: [

lib/widgets/map/map_overlays.dart

@@ -69,7 +69,12 @@ class MapOverlays extends StatelessWidget {
             ),
             child: Builder(
               builder: (context) {
-                final zoom = mapController.camera.zoom;
+                double zoom = 15.0; // fallback
+                try {
+                  zoom = mapController.camera.zoom;
+                } catch (_) {
+                  // Map controller not ready yet
+                }
                 return Text(
                   'Zoom: ${zoom.toStringAsFixed(2)}',
                   style: const TextStyle(
@@ -118,8 +123,12 @@ class MapOverlays extends StatelessWidget {
                 mini: true,
                 heroTag: "zoom_in",
                 onPressed: () {
-                  final zoom = mapController.camera.zoom;
-                  mapController.move(mapController.camera.center, zoom + 1);
+                  try {
+                    final zoom = mapController.camera.zoom;
+                    mapController.move(mapController.camera.center, zoom + 1);
+                  } catch (_) {
+                    // Map controller not ready yet
+                  }
                 },
                 child: const Icon(Icons.add),
               ),
@@ -129,8 +138,12 @@ class MapOverlays extends StatelessWidget {
                 mini: true,
                 heroTag: "zoom_out",
                 onPressed: () {
-                  final zoom = mapController.camera.zoom;
-                  mapController.move(mapController.camera.center, zoom - 1);
+                  try {
+                    final zoom = mapController.camera.zoom;
+                    mapController.move(mapController.camera.center, zoom - 1);
+                  } catch (_) {
+                    // Map controller not ready yet
+                  }
                 },
                 child: const Icon(Icons.remove),
               ),

lib/widgets/node_tag_sheet.dart

@@ -6,8 +6,9 @@ import '../services/localization_service.dart';
 
 class NodeTagSheet extends StatelessWidget {
   final OsmNode node;
+  final VoidCallback? onEditPressed;
 
-  const NodeTagSheet({super.key, required this.node});
+  const NodeTagSheet({super.key, required this.node, this.onEditPressed});
 
   @override
   Widget build(BuildContext context) {
@@ -26,8 +27,13 @@ class NodeTagSheet extends StatelessWidget {
                            node.tags['_pending_deletion'] != 'true');
         
         void _openEditSheet() {
-          Navigator.pop(context); // Close this sheet first
-          appState.startEditSession(node); // HomeScreen will auto-show the edit sheet
+          if (onEditPressed != null) {
+            onEditPressed!(); // Use callback if provided
+          } else {
+            // Fallback behavior
+            Navigator.pop(context); // Close this sheet first
+            appState.startEditSession(node); // HomeScreen will auto-show the edit sheet
+          }
         }
 
         void _deleteNode() async {