feat: add Inventory page — composites and layout sections

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

src/pages/Inventory/sections/CompositesSection.module.css

@@ -0,0 +1,74 @@
+.section {
+  margin-bottom: 40px;
+}
+
+.sectionTitle {
+  font-size: 22px;
+  font-weight: 700;
+  color: var(--text-primary);
+  margin: 0 0 24px;
+}
+
+.componentCard {
+  background: var(--bg-surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-md);
+  padding: 20px;
+  margin-bottom: 16px;
+  box-shadow: var(--shadow-sm);
+}
+
+.componentTitle {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin: 0 0 4px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.componentDesc {
+  font-size: 12px;
+  color: var(--text-muted);
+  margin: 0 0 16px;
+}
+
+.demoArea {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 12px;
+  align-items: flex-start;
+}
+
+.demoAreaColumn {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  align-items: flex-start;
+}
+
+.demoAreaRow {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 12px;
+  align-items: center;
+}
+
+.demoLabel {
+  font-size: 11px;
+  color: var(--text-muted);
+  font-weight: 500;
+}
+
+.demoGroup {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.demoGroupRow {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}