refactor(compare-toggle): migrate to queryKeys.dashboardWidgets factory

The compare-toggle component still declared three bare-literal
`["user", "dashboardWidgets"]` queryKeys for read, onMutate
cancel/set, onError rollback and onSettled invalidation. Migrate every
call site to the central `queryKeys.dashboardWidgets()` factory so a
future rename or shape evolution only touches one file. Extend the
W-RSC factory-bypass walker to cover `src/components/comparison/`
so any future regression in this directory gets caught by CI.

Closes UX H1 from the v1.4.40 QA round.

src/components/comparison/compare-toggle.tsx

@@ -3,6 +3,7 @@
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { useTranslations } from "@/lib/i18n/context";
 import { cn } from "@/lib/utils";
+import { queryKeys } from "@/lib/query-keys";
 import {
   COMPARISON_BASELINES,
   resolveDashboardLayout,
@@ -26,7 +27,7 @@ export function CompareToggle({ className }: { className?: string }) {
   const queryClient = useQueryClient();
 
   const { data: layoutData } = useQuery({
-    queryKey: ["user", "dashboardWidgets"],
+    queryKey: queryKeys.dashboardWidgets(),
     queryFn: async () => {
       const res = await fetch("/api/dashboard/widgets");
       if (!res.ok) throw new Error("failed");
@@ -52,15 +53,14 @@ export function CompareToggle({ className }: { className?: string }) {
     },
     onMutate: async (next) => {
       await queryClient.cancelQueries({
-        queryKey: ["user", "dashboardWidgets"],
+        queryKey: queryKeys.dashboardWidgets(),
       });
-      const prev = queryClient.getQueryData<DashboardLayout>([
-        "user",
-        "dashboardWidgets",
-      ]);
+      const prev = queryClient.getQueryData<DashboardLayout>(
+        queryKeys.dashboardWidgets(),
+      );
       if (prev) {
         queryClient.setQueryData<DashboardLayout>(
-          ["user", "dashboardWidgets"],
+          queryKeys.dashboardWidgets(),
           { ...prev, comparisonBaseline: next },
         );
       }
@@ -68,11 +68,13 @@ export function CompareToggle({ className }: { className?: string }) {
     },
     onError: (_err, _next, ctx) => {
       if (ctx?.prev) {
-        queryClient.setQueryData(["user", "dashboardWidgets"], ctx.prev);
+        queryClient.setQueryData(queryKeys.dashboardWidgets(), ctx.prev);
       }
     },
     onSettled: () => {
-      queryClient.invalidateQueries({ queryKey: ["user", "dashboardWidgets"] });
+      queryClient.invalidateQueries({
+        queryKey: queryKeys.dashboardWidgets(),
+      });
     },
   });
 

src/lib/__tests__/query-keys.test.ts

@@ -172,6 +172,7 @@ describe("queryKey factory enforcement", () => {
   // guard's scope until a follow-up wave routes those keys.
   const guardedRoots = [
     join(repoRoot, "src", "components", "charts"),
+    join(repoRoot, "src", "components", "comparison"),
     join(repoRoot, "src", "app", "page.tsx"),
     join(repoRoot, "src", "hooks", "use-auth.ts"),
   ];