Make sponsor image 1px border configurable in manifest

src/serena/resources/dashboard/dashboard.css

@@ -172,39 +172,6 @@ body {
     margin: 5px 0;
 }
 
-/* Sponsor Banners */
-.platinum-sponsors-section {
-    position: relative;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    height: 100px;
-    margin-bottom: 20px;
-    background-color: var(--bg-secondary);
-    border: 1px solid var(--border-color);
-    border-radius: 5px;
-    padding: 0;
-    box-shadow: var(--shadow);
-    transition: background-color 0.3s ease, border-color 0.3s ease;
-}
-
-/* Platinum sponsor in header */
-.platinum-sponsors-section.header-sponsor {
-    margin-bottom: 0;
-    width: 450px;
-    height: 100px;
-    background-color: transparent;
-    box-shadow: none;
-}
-
-.platinum-banner {
-    display: inline-block;
-    position: relative;
-    width: 100%;
-    height: 100px;
-    overflow: hidden;
-}
-
 .platinum-sponsor-slide {
     position: absolute;
     top: 0;
@@ -222,6 +189,11 @@ body {
 
 .sponsor-image {
     object-fit: contain;
+    border-radius: var(--border-radius);
+}
+
+.sponsor-border {
+    border: 1px solid var(--border-color);
 }
 
 .platinum-sponsor-slide .sponsor-image {

src/serena/resources/dashboard/dashboard.js

@@ -77,6 +77,9 @@ class SponsorRotation {
                         if (index === 0) {
                             $sponsor.addClass('active');
                         }
+                        if (sponsor.border) {
+                            $img.addClass('sponsor-border');
+                        }
                         $container.append($sponsor);
                     });
                 }