add trailing button functionality to CustomSearchBar

lib/presentation/widgets/custom_search_bar.dart

@@ -6,11 +6,17 @@ class CustomSearchBar extends StatelessWidget {
   final String hintText;
   final ValueChanged<String>? onChanged;
   final BoxConstraints? constraints;
+  final bool trailingButtonEnabled;
+  final bool trailingButtonShown;
+  final VoidCallback? onTrailingButtonPressed;
 
   const CustomSearchBar({
     super.key,
     required this.controller,
     required this.hintText,
+    this.trailingButtonShown = false,
+    this.trailingButtonEnabled = true,
+    this.onTrailingButtonPressed,
     this.onChanged,
     this.constraints,
   });
@@ -25,6 +31,20 @@ class CustomSearchBar extends StatelessWidget {
       onChanged: onChanged,
       hintStyle: WidgetStateProperty.all(const TextStyle(fontSize: 16)),
       leading: const Icon(Icons.search),
+      trailing: trailingButtonShown
+          ? [
+              GestureDetector(
+                onTap: onTrailingButtonPressed,
+                child: Icon(
+                  Icons.add_circle,
+                  color: trailingButtonEnabled
+                      ? null
+                      : Colors.grey.withValues(alpha: 0.2),
+                ),
+              ),
+              SizedBox(width: 5),
+            ]
+          : null,
       backgroundColor: WidgetStateProperty.all(CustomTheme.boxColor),
       side: WidgetStateProperty.all(BorderSide(color: CustomTheme.boxBorder)),
       shape: WidgetStateProperty.all(