nav: bump ⌂ home-glyph size for visual weight

Author: jdalton

walkthrough-overrides.css

@@ -704,6 +704,12 @@ body.wt-ready .topbar-actions {
 .topbar .part-nav a.wt-home-link {
   border-color: rgba(255, 255, 255, 0.55) !important;
   margin-right: 8px;
+  /* ⌂ (U+2302) renders small at body size — bump the glyph alone so
+   * it carries the same visual weight as the numbered part pills. */
+  font-size: 18px;
+  line-height: 1;
+  padding-top: 2px;
+  padding-bottom: 2px;
 }
 /* "Parts:" label prepended by walkthrough-drag.js once the topbar has
  * mounted. Eight numbered pills read as repetitive "Part 1 Part 2 Part