Remove unused imports and variables (S1128, S1481, S1854)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/components/Login.test.js

@@ -94,7 +94,7 @@ describe("Login", () => {
   });
 
   it("stores return-to URL from route query", () => {
-    const wrapper = mountLogin({
+    mountLogin({
       route: { query: { "return-to": "encodedUrl" } },
     });
     const store = useLoginStore();