feat(projects): capa nos cards de projeto (captura real ou painel gerado em codigo)

- ProjectCover usa as capturas ja publicadas (next/image, webp/avif) e, sem captura, um painel com monograma e stack
- .ds-cover mantem proporcao 16:10 e nao encolhe no card flex

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

app/globals.css

@@ -942,6 +942,53 @@ textarea {
   }
 }
 
+/* Capa dos cards de projeto: captura real ou painel gerado em codigo */
+.ds-cover {
+  position: relative;
+  flex: none; /* o card e uma coluna flex: sem isto a capa encolhe e perde a proporcao */
+  aspect-ratio: 16 / 10;
+  overflow: hidden;
+  margin-bottom: var(--sp-5);
+  border: 1px solid var(--border);
+  background: var(--ink);
+
+  & img {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+    object-position: top;
+    transition: transform 0.7s var(--ease-out);
+  }
+
+  .ds-card:hover & img {
+    transform: scale(1.035);
+  }
+}
+
+.ds-section-dark .ds-cover {
+  border-color: rgba(255, 255, 255, 0.1);
+}
+
+.ds-cover-fallback {
+  display: grid;
+  place-items: center;
+  padding: var(--sp-4);
+  color: var(--paper);
+  background:
+    radial-gradient(120% 90% at 100% 0%, var(--slash-dim), transparent 60%),
+    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px) 0 0 / 100% 32px,
+    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px) 0 0 / 32px 100%,
+    var(--ink);
+
+  & .ds-cover-mark {
+    font-family: var(--font-display);
+    font-size: clamp(48px, 7vw, 96px);
+    font-weight: 800;
+    letter-spacing: -0.05em;
+    color: var(--slash);
+  }
+}
+
 /* Cinematic card hover effect */
 .ds-card {
   transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);