feat: marketplace GPU spec cards with VRAM, CUDA, region, pricing

- Add GPU fields to OfferRecord type (gpu_model, gpu_memory_gb, etc.)
- Replace flat table with responsive GPU offer cards
- Show GPU model, VRAM, GPU count, CUDA version, capacity specs
- Display pricing and SLA with provider + region
- Add offer-card CSS with spec grid, hover effects, responsive layout

apps/marketplace-web/src/lib/api.ts

@@ -9,6 +9,13 @@ interface OfferRecord {
   price: number;
   sla: string;
   status: string;
+  created_at?: string;
+  gpu_model?: string;
+  gpu_memory_gb?: number;
+  gpu_count?: number;
+  cuda_version?: string;
+  price_per_hour?: number;
+  region?: string;
 }
 
 interface OffersResponse {

apps/marketplace-web/src/main.ts

@@ -124,38 +124,43 @@ function renderOffers(offers: MarketplaceOffer[]): void {
     return;
   }
 
-  const rows = offers
+  const cards = offers
     .map(
       (offer) => `
-        <tr>
-          <td>${offer.id}</td>
-          <td>${offer.provider}</td>
-          <td>${formatNumber(offer.capacity)} units</td>
-          <td>${formatNumber(offer.price, { minimumFractionDigits: 2, maximumFractionDigits: 2 })}</td>
-          <td>${offer.sla}</td>
-          <td><span class="${statusClass(offer.status)}">${offer.status}</span></td>
-        </tr>
+        <article class="offer-card">
+          <div class="offer-card-header">
+            <div class="offer-gpu-name">${offer.gpu_model || 'Unknown GPU'}</div>
+            <span class="${statusClass(offer.status)}">${offer.status}</span>
+          </div>
+          <div class="offer-provider">${offer.provider}${offer.region ? ` · ${offer.region}` : ''}</div>
+          <div class="offer-specs">
+            <div class="spec-item">
+              <span class="spec-label">VRAM</span>
+              <span class="spec-value">${offer.gpu_memory_gb ? `${offer.gpu_memory_gb} GB` : '—'}</span>
+            </div>
+            <div class="spec-item">
+              <span class="spec-label">GPUs</span>
+              <span class="spec-value">${offer.gpu_count ?? 1}×</span>
+            </div>
+            <div class="spec-item">
+              <span class="spec-label">CUDA</span>
+              <span class="spec-value">${offer.cuda_version || '—'}</span>
+            </div>
+            <div class="spec-item">
+              <span class="spec-label">Capacity</span>
+              <span class="spec-value">${formatNumber(offer.capacity)} units</span>
+            </div>
+          </div>
+          <div class="offer-pricing">
+            <div class="offer-price">${formatNumber(offer.price_per_hour ?? offer.price, { minimumFractionDigits: 2, maximumFractionDigits: 2 })} <small>credits/hr</small></div>
+            <div class="offer-sla">${offer.sla}</div>
+          </div>
+        </article>
       `,
     )
     .join('');
 
-  selectors.offersWrapper.innerHTML = `
-    <div class="table-responsive">
-      <table class="offers-table">
-        <thead>
-          <tr>
-            <th>ID</th>
-            <th>Provider</th>
-            <th>Capacity</th>
-            <th>Price</th>
-            <th>SLA</th>
-            <th>Status</th>
-          </tr>
-        </thead>
-        <tbody>${rows}</tbody>
-      </table>
-    </div>
-  `;
+  selectors.offersWrapper.innerHTML = `<div class="offers-grid">${cards}</div>`;
 }
 
 function showToast(message: string, duration = 2500): void {

apps/marketplace-web/src/style.css

@@ -112,6 +112,97 @@ body {
   overflow-x: auto;
 }
 
+.offers-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
+  gap: 20px;
+}
+
+.offer-card {
+  background: #ffffff;
+  border: 1px solid #e5e9f1;
+  border-radius: 14px;
+  padding: 20px;
+  transition: box-shadow 200ms ease, transform 200ms ease;
+}
+
+.offer-card:hover {
+  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.12);
+  transform: translateY(-2px);
+}
+
+.offer-card-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  margin-bottom: 4px;
+}
+
+.offer-gpu-name {
+  font-size: 1.15rem;
+  font-weight: 700;
+  color: #1d2736;
+}
+
+.offer-provider {
+  font-size: 0.85rem;
+  color: #64748b;
+  margin-bottom: 16px;
+}
+
+.offer-specs {
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+  gap: 8px;
+  background: #f8fafc;
+  border-radius: 10px;
+  padding: 12px;
+  margin-bottom: 16px;
+}
+
+.spec-item {
+  text-align: center;
+}
+
+.spec-label {
+  display: block;
+  font-size: 0.7rem;
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+  color: #94a3b8;
+  margin-bottom: 4px;
+}
+
+.spec-value {
+  display: block;
+  font-size: 0.95rem;
+  font-weight: 600;
+  color: #1e293b;
+}
+
+.offer-pricing {
+  display: flex;
+  justify-content: space-between;
+  align-items: baseline;
+}
+
+.offer-price {
+  font-size: 1.3rem;
+  font-weight: 700;
+  color: #6366f1;
+}
+
+.offer-price small {
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: #94a3b8;
+}
+
+.offer-sla {
+  font-size: 0.8rem;
+  color: #64748b;
+}
+
 .status-pill {
   display: inline-flex;
   align-items: center;