fix(nuxt): better equality check for json cookies

packages/nuxt/src/app/composables/cookie.ts

@@ -34,7 +34,7 @@ export function useCookie <T=string> (name: string, _opts?: CookieOptions<T>): C
   } else if (process.server) {
     const nuxtApp = useNuxtApp()
     const writeFinalCookieValue = () => {
-      if (cookie.value !== cookies[name]) {
+      if (!isEqualValue(cookie.value, cookies[name])) {
         writeServerCookie(useRequestEvent(nuxtApp), name, cookie.value, opts)
       }
     }
@@ -72,3 +72,12 @@ function writeServerCookie (event: CompatibilityEvent, name: string, value: any,
     appendHeader(event, 'Set-Cookie', serializeCookie(name, value, opts))
   }
 }
+
+function isEqualValue (val1: unknown, val2: unknown) {
+  try {
+    if (typeof val1 === 'object' && typeof val2 === 'object') {
+      return JSON.stringify(val1) === JSON.stringify(val2)
+    }
+  } catch {}
+  return val1 === val2
+}