feat: Implement paste shortcut and remove popup menu option

taken from https://github.com/krille-chan/fluffychat/pull/2775

lib/pages/chat/chat.dart

@@ -344,6 +344,12 @@ class ChatController extends State<ChatPageWithRoom>
         }
       }
 
+      return KeyEventResult.ignored;
+    } else if (evt is KeyDownEvent &&
+      evt.logicalKey == LogicalKeyboardKey.keyV &&
+      (HardwareKeyboard.instance.isControlPressed ||
+          HardwareKeyboard.instance.isMetaPressed)) {
+      sendImageFromClipBoardAction();
       return KeyEventResult.ignored;
     } else {
       return KeyEventResult.ignored;
@@ -659,10 +665,17 @@ class ChatController extends State<ChatPageWithRoom>
 
   Future<void> sendImageFromClipBoard(Uint8List? image) async {
     if (image == null) return;
+    if (!mounted) return;
+
+    final mimeType = lookupMimeType('', headerBytes: image);
+    final fileType = mimeType == null ? null : extensionFromMime(mimeType);
+    final extension = fileType == null ? '' : '.$fileType';
+    final fileName = 'clipboard-image$extension';
+
     await showAdaptiveDialog(
       context: context,
       builder: (c) => SendFileDialog(
-        files: [XFile.fromData(image)],
+        files: [XFile.fromData(image, name: fileName, mimeType: mimeType)],
         room: room,
         outerContext: context,
         threadRootEventId: activeThreadId,
@@ -1248,9 +1261,6 @@ class ChatController extends State<ChatPageWithRoom>
       case AddPopupMenuActions.location:
         sendLocationAction();
         return;
-      case AddPopupMenuActions.pasteImage:
-        sendImageFromClipBoardAction();
-        return;
     }
   }
 
@@ -1458,5 +1468,4 @@ enum AddPopupMenuActions {
   photoCamera,
   videoCamera,
   location,
-  pasteImage,
 }