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/frontend/nav/header-menu-buttons.css

@@ -611,35 +611,47 @@ body.theme-dark body > .drop-newadd .newadd-btns__item {
   color: #fff;
 }
 
-/* Theme toggle */
+/* Theme toggle — zibll toggle-radius (29px) + absolute FA center, not flex+translate(-50%) */
 .navbar-but-cluster .theme-toggle-desktop,
-.navbar-but-cluster .toggle-theme {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  width: 34px;
-  height: 34px;
+.navbar-but-cluster .toggle-theme,
+.navbar-top .toggle-theme.toggle-radius {
+  display: inline-block;
+  align-items: unset;
+  justify-content: unset;
+  width: 29px;
+  height: 29px;
   padding: 0;
-  border-radius: 999px;
+  border-radius: 100%;
   flex: 0 0 auto;
   position: relative;
   overflow: hidden;
+  vertical-align: middle;
+  box-sizing: border-box;
 }
 
 .navbar-but-cluster .theme-toggle-desktop > i,
-.navbar-but-cluster .toggle-theme > i {
+.navbar-but-cluster .toggle-theme > i,
+.navbar-top .toggle-theme.toggle-radius > i {
   margin: 0 !important;
-  line-height: 1;
+  line-height: 1 !important;
   position: absolute;
-  left: 50%;
+  left: 0 !important;
+  right: 0 !important;
   top: 50%;
-  transform: translate(-50%, -50%);
+  transform: translateY(-50%);
+  width: 1em;
+  height: 1em;
+  text-align: center;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
 }
 
 .theme-toggle-desktop,
 .theme-toggle-mobile,
 .toggle-theme {
   position: relative;
+  overflow: hidden;
 }
 
 .theme-toggle-desktop .theme-icon-moon,
@@ -649,11 +661,18 @@ body.theme-dark body > .drop-newadd .newadd-btns__item {
 .toggle-theme .theme-icon-moon,
 .toggle-theme .theme-icon-sun {
   margin: 0 !important;
-  line-height: 1;
+  line-height: 1 !important;
   width: 1em;
+  height: 1em;
   text-align: center;
 }
 
+/* Hide inactive sun/moon without leaving layout shift */
+.toggle-theme .theme-icon-sun[style*="display:none"],
+.toggle-theme .theme-icon-moon[style*="display:none"] {
+  display: none !important;
+}
+
 /* float commerce */
 .float-btn-shop-cart {
   position: relative;