feat: user-chosen browse views with grid/list toggle and profile sync

- view modes grid | table | rows + density cozy/compact, persisted via
  localStorage and shareable ?view=?density= URL params (URL wins)
- table view: sortable columns (name, rating, reviews), new sort options
  name_asc/name_desc/recently_updated (backend enum + handler)
- live debounced search, removable filter chips, '/' focuses search
- virtualization via @tanstack/react-virtual for table and rows views
- profile sync: users.preferences jsonb + GET/PUT /api/auth/me/preferences;
  preference precedence URL > server profile > localStorage > default
- add local rollup/lightningcss/tailwindcss oxide native binaries for macos dev

artifacts/toolrate/src/components/density-toggle.tsx

@@ -0,0 +1,28 @@
+import { Slider } from "@/components/ui/slider";
+import { Maximize2, Minimize2 } from "lucide-react";
+
+export type Density = "cozy" | "compact";
+
+export function DensityToggle({
+  value,
+  onValueChange,
+}: {
+  value: Density;
+  onValueChange: (d: Density) => void;
+}) {
+  return (
+    <div className="flex items-center gap-2" title={`Density: ${value === "compact" ? "Compact" : "Comfortable"}`}>
+      <Maximize2 className="w-4 h-4 text-muted-foreground" aria-hidden />
+      <Slider
+        className="w-16"
+        min={0}
+        max={1}
+        step={1}
+        value={[value === "compact" ? 1 : 0]}
+        onValueChange={([v]) => onValueChange(v === 1 ? "compact" : "cozy")}
+        aria-label="List density"
+      />
+      <Minimize2 className="w-4 h-4 text-muted-foreground" aria-hidden />
+    </div>
+  );
+}