contact messages: 1.38em corner icon, ✉️ prefix on the trigger button

frontend/src/assets/pagerite.css

@@ -416,7 +416,7 @@ body.editing #sidebar {
    .editor-pens to out-specify the row's `font: inherit` reset). */
 .editor-pens .contact-icon {
   position: relative;
-  font-size: 1.25em;
+  font-size: 1.38em;
 }
 
 .contact-icon.has-unread {

pagerite/views.py

@@ -993,7 +993,7 @@ def _contact_tag(args: str, _env: dict) -> str:
     lazy-loads the panel bundle; in the editor preview it stays inert."""
     return str(
         E.button(
-            args.strip() or "Contact us", type="button", class_="contact-trigger"
+            f"✉️ {args.strip() or 'Contact us'}", type="button", class_="contact-trigger"
         )
     )