Update dependency flutter_lints to v6

replace container with sizedbox
add check for context being mounted.

lib/widgets/custom_dialog_box.dart

@@ -94,8 +94,9 @@ class CustomDialogBoxState extends State<CustomDialogBox> {
         );
       });
     }
-
-    FocusScope.of(context).unfocus(); // Close keyboard
+    if (mounted) {
+      FocusScope.of(context).unfocus(); // Close keyboard
+    }
   }
 
   void _nextPage() {
@@ -175,7 +176,7 @@ class CustomDialogBoxState extends State<CustomDialogBox> {
                 ),
               ),
               if (_predictions.isNotEmpty)
-                Container(
+                SizedBox(
                   height: 150,
                   child: ListView.builder(
                     itemCount: _predictions.length,
@@ -206,9 +207,9 @@ class CustomDialogBoxState extends State<CustomDialogBox> {
               const SizedBox(height: 10),
               DropdownButtonFormField<String>(
                 value: _selectedRadius,
-                decoration: const InputDecoration(labelText: 'Search Radius'),
+                decoration: const InputDecoration(labelText: 'Search2 Radius'),
                 items:
-                    ['1 mile', '2 miles', '5 miles']
+                    ['1/8 mile', '1/4 mile', '3/4 mile', '1 mile']
                         .map((e) => DropdownMenuItem(value: e, child: Text(e)))
                         .toList(),
                 onChanged: (val) => setState(() => _selectedRadius = val),

pubspec.yaml

@@ -55,7 +55,7 @@ dev_dependencies:
   # activated in the `analysis_options.yaml` file located at the root of your
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
-  flutter_lints: ^5.0.0
+  flutter_lints: 6.0.0
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec