filtered deleted messages from search and chat view, refactored chat bubble styling for deleted comments, and updated tests

lib/view/pages/talk/widgets/chat_bubble.dart

@@ -148,11 +148,33 @@ class _ChatBubbleState extends State<ChatBubble>
     ).asDialog(context);
   }
 
+  bool get _rendersAsCommentBubble =>
+      widget.bubbleData.messageType ==
+          GetRoomResponseObjectMessageType.comment ||
+      widget.bubbleData.messageType ==
+          GetRoomResponseObjectMessageType.deletedComment;
+
+  TextStyle? _messageTextStyle(BuildContext context) {
+    final theme = Theme.of(context);
+    switch (widget.bubbleData.messageType) {
+      case GetRoomResponseObjectMessageType.system:
+        return theme.textTheme.bodySmall;
+      case GetRoomResponseObjectMessageType.deletedComment:
+        return theme.textTheme.bodyMedium?.copyWith(
+          color: theme.hintColor,
+          fontStyle: FontStyle.italic,
+        );
+      case GetRoomResponseObjectMessageType.comment:
+      case GetRoomResponseObjectMessageType.voiceMessage:
+      case GetRoomResponseObjectMessageType.command:
+        return null;
+    }
+  }
+
   BubbleStyle _getStyle() {
     final styles = ChatBubbleStyles(context);
     final BubbleStyle base;
-    if (widget.bubbleData.messageType !=
-        GetRoomResponseObjectMessageType.comment) {
+    if (!_rendersAsCommentBubble) {
       base = styles.getSystemStyle();
     } else {
       base = widget.isSender
@@ -210,14 +232,11 @@ class _ChatBubbleState extends State<ChatBubble>
       originalData: widget.bubbleData.messageParameters,
     );
     final showActorDisplayName =
-        widget.bubbleData.messageType ==
-            GetRoomResponseObjectMessageType.comment &&
+        _rendersAsCommentBubble &&
         widget.chatData.type != GetRoomResponseObjectConversationType.oneToOne;
     final showBubbleTime =
         widget.bubbleData.messageType !=
-            GetRoomResponseObjectMessageType.system &&
-        widget.bubbleData.messageType !=
-            GetRoomResponseObjectMessageType.deletedComment;
+        GetRoomResponseObjectMessageType.system;
 
     final parent = widget.bubbleData.parent;
     final actorBaseStyle = TextStyle(
@@ -294,11 +313,7 @@ class _ChatBubbleState extends State<ChatBubble>
                 timeText: timeText,
                 messageWidget: message.getWidget(
                   highlightQuery: widget.highlightQuery,
-                  style:
-                      widget.bubbleData.messageType ==
-                          GetRoomResponseObjectMessageType.system
-                      ? Theme.of(context).textTheme.bodySmall
-                      : null,
+                  style: _messageTextStyle(context),
                 ),
                 parent: parent,
                 bubbleData: widget.bubbleData,