fix mobile text autosizing on shop pages

Chrome's font boosting algorithm was applying different text size
multipliers across pages, making the announcement bar font size
inconsistent between home and collection views on mobile.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

assets/css/shop/components.css

@@ -833,6 +833,8 @@
     font-family: var(--t-font-body);
     color: var(--t-text-primary);
     min-height: 100vh;
+    -webkit-text-size-adjust: 100%;
+    text-size-adjust: 100%;
   }
 
   .shop-container[data-bottom-nav] {