fix(miniprogram): align workbench header logo layout with template classes

Co-authored-by: Cursor <cursoragent@cursor.com>

miniprogram/styles/mp-shell.scss

@@ -59,27 +59,24 @@ page {
 }
 
 .mp-header__title-row {
-  padding-right: var(--sq-capsule-right-safe, 96px);
-  box-sizing: border-box;
-}
-
-.mp-header__brand {
   display: flex;
   flex-direction: row;
   align-items: center;
   gap: 20rpx;
   min-width: 0;
+  padding-right: var(--sq-capsule-right-safe, 96px);
+  box-sizing: border-box;
 }
 
 .mp-header__logo {
-  height: 64rpx;
-  width: auto;
+  width: 72rpx;
+  height: 72rpx;
   flex-shrink: 0;
   border-radius: 12rpx;
   background: rgba(255, 255, 255, 0.18);
 }
 
-.mp-header__brand-text {
+.mp-header__titles {
   flex: 1;
   min-width: 0;
 }