feat(03-02): navigation restructure, TotalsBar refactor, and setup hooks

- Move collection view from / to /collection with gear/planning tabs
- Rewrite / as dashboard with three summary cards (Collection, Planning, Setups)
- Refactor TotalsBar to accept optional stats/linkTo/title props
- Create DashboardCard component for dashboard summary cards
- Create useSetups hooks (CRUD + sync/remove item mutations)
- Update __root.tsx with route-aware TotalsBar, FAB visibility, resolve navigation
- Add item picker and setup delete UI state to uiStore
- Invalidate setups queries on item update/delete for stale data prevention
- Update routeTree.gen.ts with new collection/setups routes

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

src/client/components/DashboardCard.tsx

@@ -0,0 +1,50 @@
+import { Link } from "@tanstack/react-router";
+import type { ReactNode } from "react";
+
+interface DashboardCardProps {
+  to: string;
+  search?: Record<string, string>;
+  title: string;
+  icon: ReactNode;
+  stats: Array<{ label: string; value: string }>;
+  emptyText?: string;
+}
+
+export function DashboardCard({
+  to,
+  search,
+  title,
+  icon,
+  stats,
+  emptyText,
+}: DashboardCardProps) {
+  const allZero = stats.every(
+    (s) => s.value === "0" || s.value === "$0.00" || s.value === "0g",
+  );
+
+  return (
+    <Link
+      to={to}
+      search={search}
+      className="block bg-white rounded-xl border border-gray-100 hover:border-gray-200 hover:shadow-md transition-all p-6"
+    >
+      <div className="flex items-center gap-3 mb-4">
+        <span className="text-2xl">{icon}</span>
+        <h2 className="text-lg font-semibold text-gray-900">{title}</h2>
+      </div>
+      <div className="space-y-1.5">
+        {stats.map((stat) => (
+          <div key={stat.label} className="flex items-center justify-between">
+            <span className="text-sm text-gray-500">{stat.label}</span>
+            <span className="text-sm font-medium text-gray-700">
+              {stat.value}
+            </span>
+          </div>
+        ))}
+      </div>
+      {allZero && emptyText && (
+        <p className="mt-4 text-sm text-blue-600 font-medium">{emptyText}</p>
+      )}
+    </Link>
+  );
+}