feat(web): add ChicoryTV component primitives

refs #80

web/src/shell.css

@@ -254,6 +254,93 @@
   line-height: 1;
 }
 
+.ctv-gallery {
+  margin-top: var(--space-9, 24px);
+}
+
+.ctv-gallery-heading {
+  margin-bottom: var(--space-7, 16px);
+}
+
+.ctv-gallery-heading p {
+  margin: 0 0 var(--space-2, 4px);
+  color: var(--text-secondary, #a89e92);
+  font-size: var(--text-xs, 12px);
+  font-weight: var(--weight-semibold, 600);
+  letter-spacing: var(--tracking-caps, 0.06em);
+  text-transform: uppercase;
+}
+
+.ctv-gallery-heading h2 {
+  margin: 0;
+  font-size: var(--text-xl, 20px);
+  line-height: var(--leading-tight, 1.2);
+}
+
+.ctv-gallery-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: var(--space-7, 16px);
+}
+
+.ctv-card-title h3 {
+  margin: 0;
+  font-size: var(--text-md, 14px);
+  line-height: 1.2;
+}
+
+.ctv-demo-stack {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-7, 16px);
+}
+
+.ctv-demo-row {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: var(--space-5, 10px);
+}
+
+.ctv-demo-fields {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: var(--space-7, 16px);
+}
+
+.ctv-stat-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: var(--space-8, 20px);
+}
+
+.ctv-demo-progress {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-6, 12px);
+}
+
+.ctv-feedback-grid {
+  display: grid;
+  grid-template-columns: minmax(260px, 1fr) auto;
+  gap: var(--space-7, 16px);
+  align-items: start;
+}
+
+.ctv-navigation-demo {
+  display: grid;
+  grid-template-columns: 216px minmax(0, 1fr);
+  gap: var(--space-8, 20px);
+  align-items: start;
+}
+
+.ctv-navigation-panel {
+  border: 1px solid var(--border-hairline, #2e2823);
+  border-radius: var(--radius-md, 7px);
+  background: var(--surface-card, #1c1917);
+  padding: var(--space-3, 6px);
+}
+
 @media (max-width: 720px) {
   .ctv-app-shell {
     grid-template-columns: 1fr;
@@ -281,6 +368,13 @@
   .ctv-theme-switcher {
     justify-content: flex-start;
   }
+
+  .ctv-gallery-grid,
+  .ctv-demo-fields,
+  .ctv-feedback-grid,
+  .ctv-navigation-demo {
+    grid-template-columns: 1fr;
+  }
 }
 
 @media (prefers-reduced-motion: reduce) {