feat(chat): prevent duplicate paste image context menu options

lib/features/chat/widgets/modern_chat_input.dart

@@ -319,10 +319,9 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
 
   /// Builds a custom context menu with standard options plus "Paste Image".
   ///
-  /// The standard paste only works for text. This adds a "Paste Image"
+  /// Adds a "Paste Image" option when there's an image in the clipboard,
-  /// option that uses the pasteboard package to read images from clipboard
+  /// but only if the system hasn't already provided one (to avoid duplicates
-  /// on both iOS and Android. The option only appears when there's actually
+  /// on platforms like iOS that may include their own paste image option).
-  /// an image in the clipboard.
   Widget _buildContextMenu(
     BuildContext context,
     EditableTextState editableTextState,
@@ -348,6 +347,19 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
         final hasImage = imageData != null && imageData.isNotEmpty;
 
         if (hasImage) {
+          // Check if the system already provides a paste image option
+          // (e.g., iOS may include one automatically). Look for any button
+          // with a label containing "image" (case-insensitive) to avoid
+          // adding a duplicate.
+          final pasteImageLabel =
+              AppLocalizations.of(context)?.pasteImage ?? 'Paste Image';
+          final alreadyHasPasteImage = buttonItems.any(
+            (item) =>
+                item.label != null &&
+                item.label!.toLowerCase().contains('image'),
+          );
+
+          if (!alreadyHasPasteImage) {
             // Find the index of the standard Paste button to insert after it
             final pasteIndex = buttonItems.indexWhere(
               (item) => item.type == ContextMenuButtonType.paste,
@@ -355,7 +367,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
 
             // Capture imageData in closure to avoid re-reading clipboard
             final pasteImageItem = ContextMenuButtonItem(
-            label: AppLocalizations.of(context)?.pasteImage ?? 'Paste Image',
+              label: pasteImageLabel,
               onPressed: () {
                 // Close the context menu first
                 ContextMenuController.removeAny();
@@ -371,6 +383,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
               buttonItems.add(pasteImageItem);
             }
           }
+        }
 
         return AdaptiveTextSelectionToolbar.buttonItems(
           anchors: editableTextState.contextMenuAnchors,
@@ -1621,7 +1634,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
                       .toList(),
                   onContentInserted: _handleContentInserted,
                 ),
-                // Custom context menu with "Paste Image" option for iOS
+                // Custom context menu with "Paste Image" option
                 contextMenuBuilder: (context, editableTextState) {
                   return _buildContextMenu(context, editableTextState);
                 },