DEV: Update linting config and run gjs-codemod (#177)

scss/composer.scss

@@ -1,3 +1,5 @@
+@use "lib/viewport";
+
 #reply-control
   .select-kit.dropdown-select-box.composer-actions
   .select-kit-header {
@@ -12,7 +14,7 @@
 }
 
 #reply-control.hide-preview:not(.draft) {
-  @include breakpoint("mobile-extra-large", $rule: min-width) {
+  @include viewport.from(sm) {
     background: var(--d-content-background);
     border-top-right-radius: var(--d-border-radius);
     border-top-left-radius: var(--d-border-radius);