v0.11.27 message bug fixes

frontend/src/components/ChatWindow.jsx

@@ -296,19 +296,28 @@ export default function ChatWindow({ group, onBack, onGroupUpdated, onDirectMess
           </button>
         )}
 
-        {messages.map((msg, i) => (
-          <Message
-            key={msg.id}
-            message={msg}
-            prevMessage={messages[i - 1]}
-            currentUser={currentUser}
-            onReply={handleReply}
-            onDelete={handleDelete}
-            onReact={handleReact}
-            onDirectMessage={handleDirectMessage}
-            isDirect={isDirect}
-            onlineUserIds={onlineUserIds} />
-        ))}
+        {messages.map((msg, i) => {
+          // Skip deleted entries when looking for the effective previous message.
+          // Deleted messages render null, so they must not affect date separators
+          // or avatar-grouping for the messages that follow them.
+          let effectivePrev = null;
+          for (let j = i - 1; j >= 0; j--) {
+            if (!messages[j].is_deleted) { effectivePrev = messages[j]; break; }
+          }
+          return (
+            <Message
+              key={msg.id}
+              message={msg}
+              prevMessage={effectivePrev}
+              currentUser={currentUser}
+              onReply={handleReply}
+              onDelete={handleDelete}
+              onReact={handleReact}
+              onDirectMessage={handleDirectMessage}
+              isDirect={isDirect}
+              onlineUserIds={onlineUserIds} />
+          );
+        })}
 
         {typing.length > 0 && (
           <div className="typing-indicator">