feat: add Component Inventory page — primitives section

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/pages/Inventory/Inventory.module.css

@@ -0,0 +1,87 @@
+.page {
+  min-height: 100vh;
+  background: var(--bg-body);
+  font-family: var(--font-body);
+}
+
+.header {
+  position: sticky;
+  top: 0;
+  z-index: 10;
+  background: var(--bg-surface);
+  border-bottom: 1px solid var(--border);
+  padding: 12px 24px;
+  display: flex;
+  align-items: center;
+  gap: 16px;
+}
+
+.headerTitle {
+  font-size: 18px;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin: 0;
+}
+
+.backLink {
+  font-size: 13px;
+  color: var(--amber);
+  text-decoration: none;
+  margin-left: auto;
+}
+
+.backLink:hover {
+  text-decoration: underline;
+}
+
+.body {
+  display: flex;
+  gap: 0;
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 24px;
+}
+
+.nav {
+  width: 200px;
+  flex-shrink: 0;
+  position: sticky;
+  top: 57px;
+  height: calc(100vh - 57px);
+  overflow-y: auto;
+  padding-right: 16px;
+}
+
+.navSection {
+  margin-bottom: 8px;
+}
+
+.navLabel {
+  font-size: 11px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+  color: var(--text-muted);
+  padding: 8px 8px 4px;
+  display: block;
+}
+
+.navLink {
+  display: block;
+  font-size: 13px;
+  color: var(--text-secondary);
+  text-decoration: none;
+  padding: 4px 8px;
+  border-radius: var(--radius-sm);
+  line-height: 1.5;
+}
+
+.navLink:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.content {
+  flex: 1;
+  min-width: 0;
+}