feat(09-02): add WeightSummaryCard with donut chart and classification subtotals

- Install recharts dependency for donut chart visualization
- Create WeightSummaryCard component with pill toggle (category/classification views)
- Compute base/worn/consumable/total weight subtotals from items array
- Render donut chart with colored segments, center total, and hover tooltips
- Wire WeightSummaryCard into setup detail page below sticky bar

src/client/routes/setups/$setupId.tsx

@@ -4,6 +4,7 @@ import { CategoryHeader } from "../../components/CategoryHeader";
 import { ClassificationBadge } from "../../components/ClassificationBadge";
 import { ItemCard } from "../../components/ItemCard";
 import { ItemPicker } from "../../components/ItemPicker";
+import { WeightSummaryCard } from "../../components/WeightSummaryCard";
 import {
 	useDeleteSetup,
 	useRemoveSetupItem,
@@ -189,9 +190,10 @@ function SetupDetailPage() {
 				</div>
 			)}
 
-			{/* Items grouped by category */}
+			{/* Weight summary card + items grouped by category */}
 			{itemCount > 0 && (
 				<div className="pb-6">
+					<WeightSummaryCard items={setup.items} />
 					{Array.from(groupedItems.entries()).map(
 						([
 							categoryId,