feat: add sound and flash alert for automod caught messages (#5026)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/messages/layouts/MessageLayout.cpp

@@ -342,9 +342,13 @@ void MessageLayout::updateBuffer(QPixmap *buffer,
               this->message_->flags.has(MessageFlag::HighlightedWhisper)) &&
              !this->flags.has(MessageLayoutFlag::IgnoreHighlights))
     {
-        // Blend highlight color with usual background color
-        backgroundColor =
-            blendColors(backgroundColor, *this->message_->highlightColor);
+        assert(this->message_->highlightColor);
+        if (this->message_->highlightColor)
+        {
+            // Blend highlight color with usual background color
+            backgroundColor =
+                blendColors(backgroundColor, *this->message_->highlightColor);
+        }
     }
     else if (this->message_->flags.has(MessageFlag::Subscription) &&
              ctx.preferences.enableSubHighlight)

src/messages/layouts/MessageLayoutContext.cpp

@@ -47,6 +47,12 @@ void MessagePreferences::connectSettings(Settings *settings,
         },
         holder);
 
+    settings->enableAutomodHighlight.connect(
+        [this](const auto &newValue) {
+            this->enableAutomodHighlight = newValue;
+        },
+        holder);
+
     settings->alternateMessages.connect(
         [this](const auto &newValue) {
             this->alternateMessages = newValue;

src/messages/layouts/MessageLayoutContext.hpp

@@ -39,6 +39,7 @@ struct MessagePreferences {
     bool enableElevatedMessageHighlight{};
     bool enableFirstMessageHighlight{};
     bool enableSubHighlight{};
+    bool enableAutomodHighlight{};
 
     bool alternateMessages{};
     bool separateMessages{};