Fix product page layout and add bold fonts to comment buttons

- Restore two-column layout for product and content pages on desktop
- Add font-weight: bold to comment buttons in light mode for consistency

Fixes regression where product pages were displaying single column on desktop

make_post_sell/static/css/common.css

@@ -485,18 +485,21 @@ input.mps-button-red {
     background: var(--green-color);
     color: white;
     border: 2px solid transparent;
+    font-weight: bold;
 }
 
 .delete-link {
     background: var(--red-color);
     color: white;
     border: 2px solid transparent;
+    font-weight: bold;
 }
 
 .mps-comment-form-button {
     background: var(--green-color);
     color: white;
     border: 2px solid transparent;
+    font-weight: bold;
 }
 
 [data-theme="dark"] .reply-link,

make_post_sell/templates/content.j2

@@ -30,7 +30,7 @@
 
 {% block content -%}
 
-<section class="one-column">
+<section class="two-column">
 
   <div class="product-images">
     {% if "thumbnail1" in product.extensions %}