fix(frontend-tests): migrate shared msw handlers to v2 api

Unblock CI by aligning the shared mock server with the installed msw major version.

Decision: switch from rest/ctx responder style to http/HttpResponse to match v2 semantics used elsewhere in the contract tests.

This keeps test behavior unchanged while removing a brittle version mismatch that caused all frontend unit suites to fail at import time.

Author: gildesmarais

frontend/src/__tests__/mocks/server.ts

@@ -1,28 +1,26 @@
 import { setupServer } from 'msw/node';
-import { rest } from 'msw';
+import { http, HttpResponse } from 'msw';
 
 export const server = setupServer(
-  rest.get('/api/v1/strategies', (req, res, ctx) => {
-    return res(
-      ctx.json({
-        success: true,
-        data: {
-          strategies: [
-            {
-              id: 'ssrf_filter',
-              name: 'ssrf_filter',
-              display_name: 'SSRF Filter',
-            },
-            {
-              id: 'browserless',
-              name: 'browserless',
-              display_name: 'Browserless',
-            },
-          ],
-        },
-        meta: { total: 2 },
-      })
-    );
+  http.get('/api/v1/strategies', () => {
+    return HttpResponse.json({
+      success: true,
+      data: {
+        strategies: [
+          {
+            id: 'ssrf_filter',
+            name: 'ssrf_filter',
+            display_name: 'SSRF Filter',
+          },
+          {
+            id: 'browserless',
+            name: 'browserless',
+            display_name: 'Browserless',
+          },
+        ],
+      },
+      meta: { total: 2 },
+    });
   })
 );