frontend: fix inconsistent font

Button and Textarea had different fonts compared to the rest of
the app. To improve the UI, we'd like to unify the font family.

Author: shonsirsha

frontends/web/src/style/layout.css

@@ -116,6 +116,10 @@
     }
 }
 
+button, textarea {
+    font-family: inherit;
+}
+
 .content {
     flex: 1;
     margin: 0 auto;
@@ -392,4 +396,4 @@
 .light-mode .show-in-darkmode,
 .dark-mode .show-in-lightmode {
     display: none;
-}
+}