feat: add search functionality to opeanapi operation picker dialog

lib/dashbot/features/chat/view/widgets/openapi_operation_picker_dialog.dart

@@ -40,12 +40,24 @@ Future<List<OpenApiOperationItem>?> showOpenApiOperationPickerDialog({
   // Multi-select: default select all
   final selected = <int>{for (var i = 0; i < ops.length; i++) i};
   bool selectAll = ops.isNotEmpty;
+  String searchQuery = '';
 
   return showDialog<List<OpenApiOperationItem>>(
     context: context,
     useRootNavigator: true,
     builder: (ctx) {
       return StatefulBuilder(builder: (ctx, setState) {
+        // Filter operations based on search query
+        final filteredOps = <int>[];
+        for (int i = 0; i < ops.length; i++) {
+          final o = ops[i];
+          final label = '${o.method} ${o.path}'.toLowerCase();
+          if (searchQuery.isEmpty ||
+              label.contains(searchQuery.toLowerCase())) {
+            filteredOps.add(i);
+          }
+        }
+
         return AlertDialog(
           title: Text('Import from $title'),
           content: SizedBox(
@@ -54,13 +66,25 @@ Future<List<OpenApiOperationItem>?> showOpenApiOperationPickerDialog({
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.stretch,
               children: [
-                ExpansionTile(
+                // TODO: Create a Search field widget
-                  initiallyExpanded: true,
-                  title: const Text('Available routes'),
-                  children: [
                 Padding(
-                      padding: const EdgeInsets.symmetric(horizontal: 8.0),
+                  padding: const EdgeInsets.only(bottom: 16.0),
-                      child: CheckboxListTile(
+                  child: TextField(
+                    onChanged: (value) {
+                      setState(() {
+                        searchQuery = value;
+                      });
+                    },
+                    decoration: const InputDecoration(
+                      labelText: 'Search routes',
+                      hintText: 'Type to filter routes...',
+                      prefixIcon: Icon(Icons.search),
+                      border: OutlineInputBorder(),
+                    ),
+                  ),
+                ),
+                // Select all checkbox
+                CheckboxListTile(
                   value: selectAll,
                   onChanged: (v) {
                     setState(() {
@@ -75,12 +99,12 @@ Future<List<OpenApiOperationItem>?> showOpenApiOperationPickerDialog({
                   title: const Text('Select all'),
                   controlAffinity: ListTileControlAffinity.leading,
                 ),
-                    ),
+                // Routes list
-                    SizedBox(
+                Expanded(
-                      height: 300,
                   child: ListView.builder(
-                        itemCount: ops.length,
+                    itemCount: filteredOps.length,
-                        itemBuilder: (c, i) {
+                    itemBuilder: (c, index) {
+                      final i = filteredOps[index];
                       final o = ops[i];
                       final label = '${o.method} ${o.path}';
                       final checked = selected.contains(i);
@@ -104,8 +128,6 @@ Future<List<OpenApiOperationItem>?> showOpenApiOperationPickerDialog({
                 ),
               ],
             ),
-              ],
-            ),
           ),
           actions: [
             TextButton(