FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/viem/chains/definitions/happychainTestnet.ts

@@ -0,0 +1,30 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const happychainTestnet = /*#__PURE__*/ defineChain({
+  id: 216,
+  name: 'Happychain Testnet',
+  nativeCurrency: {
+    symbol: 'HAPPY',
+    name: 'HAPPY',
+    decimals: 18,
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.testnet.happy.tech/http'],
+      webSocket: ['wss://rpc.testnet.happy.tech/ws'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Happy Chain Testnet Explorer',
+      url: 'https://explorer.testnet.happy.tech',
+    },
+  },
+  contracts: {
+    multicall3: {
+      address: '0xca11bde05977b3631167028862be2a173976ca11',
+      blockCreated: 1,
+    },
+  },
+  testnet: true,
+})