refactor: fix clang-tidy auto*, const&, and curly braces (#5083)

src/common/ChatterSet.cpp

@@ -27,11 +27,15 @@ void ChatterSet::updateOnlineChatters(
     for (auto &&chatter : lowerCaseUsernames)
     {
         if (this->items.exists(chatter))
+        {
             tmp.put(chatter, this->items.get(chatter));
 
-        // Less chatters than the limit => try to preserve as many as possible.
+            // Less chatters than the limit => try to preserve as many as possible.
+        }
         else if (lowerCaseUsernames.size() < chatterLimit)
+        {
             tmp.put(chatter, chatter);
+        }
     }
 
     this->items = std::move(tmp);
@@ -50,7 +54,9 @@ std::vector<QString> ChatterSet::filterByPrefix(const QString &prefix) const
     for (auto &&item : this->items)
     {
         if (item.first.startsWith(lowerPrefix))
+        {
             result.push_back(item.second);
+        }
     }
 
     return result;