Add dynamic footer badge marquee with admin management.

Store badges in Postgres, expose public/admin APIs, render an infinite footer slider, and ship /admin for paste-embed CRUD.

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

app/globals.css

@@ -116,6 +116,68 @@
   .mobile-sidebar-link-danger:hover::before {
     @apply bg-red-400;
   }
+
+  .badge-marquee {
+    @apply relative w-full overflow-hidden;
+    mask-image: linear-gradient(
+      to right,
+      transparent,
+      black 8%,
+      black 92%,
+      transparent
+    );
+  }
+
+  .badge-marquee-track {
+    @apply flex w-max items-center gap-10;
+    animation: badge-marquee-scroll var(--badge-marquee-duration, 28s) linear infinite;
+  }
+
+  .badge-marquee:hover .badge-marquee-track {
+    animation-play-state: paused;
+  }
+
+  @media (prefers-reduced-motion: reduce) {
+    .badge-marquee-track {
+      animation: none;
+      flex-wrap: wrap;
+      justify-content: center;
+      width: 100%;
+    }
+
+    .badge-marquee-item[aria-hidden="true"] {
+      display: none;
+    }
+  }
+
+  .badge-marquee-item {
+    @apply flex shrink-0 items-center justify-center;
+  }
+
+  .badge-marquee-slot {
+    @apply flex h-14 max-h-14 items-center justify-center;
+  }
+
+  .badge-marquee-slot a,
+  .badge-marquee-link {
+    @apply m-0 inline-flex items-center p-0 leading-none no-underline;
+  }
+
+  .badge-marquee-slot img,
+  .badge-marquee-slot iframe,
+  .badge-marquee-slot svg,
+  .badge-marquee-slot object {
+    display: block !important;
+    margin: 0 !important;
+    padding: 0 !important;
+    border: 0 !important;
+    max-height: 3.5rem !important;
+    width: auto !important;
+    height: auto !important;
+    max-width: min(280px, 70vw) !important;
+    object-fit: contain;
+    vertical-align: middle;
+  }
 }
 
 @keyframes mockup-float {
@@ -246,3 +308,12 @@
     transform: scale(0.6) rotate(90deg);
   }
 }
+
+@keyframes badge-marquee-scroll {
+  from {
+    transform: translateX(0);
+  }
+  to {
+    transform: translateX(-50%);
+  }
+}