💄 Style: optimize PostChat widget style

assets/css/_partials/_widgets.scss

@@ -2,5 +2,6 @@
 @import '_widgets/fixed-button';
 @import '_widgets/github-corner';
 @import '_widgets/noscript-warning';
+@import '_widgets/post-chat';
 @import '_widgets/reading-progress';
 @import '_widgets/typeit';

assets/css/_partials/_widgets/_post-chat.scss

@@ -0,0 +1,3 @@
+#postChat_button {
+  @extend .print-d-none;
+}

layouts/partials/init/index.html

@@ -1,4 +1,4 @@
-{{- .Scratch.Set "version" "v0.3.19" -}}
+{{- .Scratch.Set "version" "v0.3.20-de72a8c8" -}}
 {{- .Scratch.Set "this" dict -}}
 
 {{- partial "init/detection-env.html" . -}}