treewide cleanups

lib/widgets/composer/composer.dart

@@ -399,11 +399,11 @@ class const Composer(
 
                                       if (!shiftPressed) {
                                         send();
-                                        return KeyEventResult.handled;
+                                        return .handled;
                                       }
                                     }
 
-                                    return KeyEventResult.ignored;
+                                    return .ignored;
                                   },
                                   // Overrides the keyboard shortcut for pasting
                                   child: Actions(

lib/widgets/composer/relation_preview.dart

@@ -38,7 +38,7 @@ class const RelationPreview(
               onPressed: toggleShouldMention,
               child: Text(
                 shouldMention ? "@On" : "@Off",
-                style: TextStyle(
+                style: .new(
                   fontWeight: .w900,
                   color: shouldMention ? null : Theme.of(context).disabledColor,
                 ),