chore: validate edit collection activity for duplicate collection

store/postwoman.js

@@ -132,6 +132,12 @@ export const mutations = {
 
   editCollection({ collections }, payload) {
     const { collection, collectionIndex } = payload;
+    const { name } = collection
+    const duplicateCollection = collections.some(item => item.name === name)
+    if (duplicateCollection) {
+      this.$toast.info('Duplicate collection');
+      return;
+    }
     collections[collectionIndex] = collection;
   },