fix: update the input style sheet when scaling (#5960)

CHANGELOG.md

@@ -25,6 +25,7 @@
 - Bugfix: Ensure miniaudio backend exits even if it doesn't exit cleanly. (#5896)
 - Bugfix: Fixed search in emote popup not always working correctly. (#5946)
 - Bugfix: Fixed channel point redemptions with messages not showing up if PubSub is disconnected. (#5948)
+- Bugfix: Fixed the input font not immediately updating when zooming in/out. (#5960)
 - Dev: Subscriptions to PubSub channel points redemption topics now use no auth token, making it continue to work during PubSub shutdown. (#5947)
 - Dev: Add initial experimental EventSub support. (#5837, #5895, #5897, #5904, #5910, #5903, #5915, #5916, #5930, #5935, #5932, #5943, #5952, #5953)
 - Dev: Remove unneeded platform specifier for toasts. (#5914)

src/widgets/splits/SplitInput.cpp

@@ -235,6 +235,14 @@ void SplitInput::scaleChangedEvent(float scale)
     }
     this->ui_.textEdit->setFont(
         app->getFonts()->getFont(FontStyle::ChatMedium, scale));
+
+    QPalette placeholderPalette;
+    placeholderPalette.setColor(
+        QPalette::PlaceholderText,
+        this->theme->messages.textColors.chatPlaceholder);
+
+    this->ui_.textEdit->setStyleSheet(this->theme->splits.input.styleSheet);
+    this->ui_.textEdit->setPalette(placeholderPalette);
     this->ui_.textEditLength->setFont(
         app->getFonts()->getFont(FontStyle::ChatMedium, scale));
     this->ui_.replyLabel->setFont(