fix(nav): align navbar text and icon baselines with zibll

Center FA icons in toggle-radius/btn chips, restore menu-item title flex baseline, and match CTA/logo vertical alignment so top bar text and icons no longer drift.

assets/css/core/buttons.css

@@ -253,7 +253,7 @@
 .active.badg.hollow,
 .active > .hollow:not(.vip-tag) { --this-color: var(--focus-color); }
 
-/* toggle-radius (round 29px toggle) */
+/* toggle-radius (round 29px toggle) — zibll 1:1 */
 .toggle-radius {
   background: var(--this-bg);
   width: 29px;
@@ -265,8 +265,24 @@
   vertical-align: text-top;
   --this-bg: var(--main-border-color);
 }
+/* zibll groups these with abs-* : absolute + vertical center; then pin left/right 0 */
 .toggle-radius .fa,
-.toggle-radius .icon { right: 0 !important; left: 0 !important; margin: auto; }
+.toggle-radius .icon,
+.toggle-radius > i {
+  position: absolute;
+  top: 50%;
+  right: 0 !important;
+  left: 0 !important;
+  margin: auto;
+  transform: translateY(-50%);
+  line-height: 1;
+  width: 1em;
+  height: 1em;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  text-align: center;
+}
 
 /* solid color modifiers — set --this-bg; default --this-color white */
 .b-gray, .b-theme, .b-red, .b-yellow, .b-blue, .b-blue-2, .b-black,