refactor: use qclone for deep copying topics

packages/core/collections/topics.js

@@ -1,6 +1,7 @@
 import Notebooks from "./notebooks";
 import Notes from "./notes";
 import Topic from "../models/topic";
+import { qclone } from "qclone";
 
 export default class Topics {
   /**
@@ -59,7 +60,7 @@ export default class Topics {
   }
 
   async delete(...topics) {
-    let allTopics = JSON.parse(JSON.stringify(this.all)); //FIXME: make a deep copy
+    let allTopics = qclone(this.all); //FIXME: make a deep copy
     for (let i = 0; i < allTopics.length; i++) {
       let topic = allTopics[i];
       if (!topic) continue;

packages/core/package.json

@@ -19,6 +19,7 @@
     "fast-sort": "^2.0.1",
     "fuzzysearch": "^1.0.3",
     "node-fetch": "^2.6.0",
+    "qclone": "^1.0.4",
     "transfun": "^1.0.2"
   }
 }

packages/core/yarn.lock

@@ -3807,6 +3807,11 @@ punycode@^2.1.0, punycode@^2.1.1:
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.1.1.tgz#b58b010ac40c22c5657616c8d2c2c02c7bf479ec"
   integrity sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==
 
+qclone@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/qclone/-/qclone-1.0.4.tgz#a0e6657f6a77c5e5dfa75139670a177547120c4e"
+  integrity sha512-PJerDoeC0mU6WCBfshfgu6oYPju7CDHlvF/7tt/ZVN37L04nZ0zZSgs0Ds3QyX7psfPA91DvkTR80WTW79Uy+Q==
+
 qs@~6.5.2:
   version "6.5.2"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.2.tgz#cb3ae806e8740444584ef154ce8ee98d403f3e36"