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/nexi.ts

@@ -0,0 +1,25 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const nexi = /*#__PURE__*/ defineChain({
+  id: 4242,
+  name: 'Nexi',
+  nativeCurrency: { name: 'Nexi', symbol: 'NEXI', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.chain.nexi.technology'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'NexiScan',
+      url: 'https://www.nexiscan.com',
+      apiUrl: 'https://www.nexiscan.com/api',
+    },
+  },
+  contracts: {
+    multicall3: {
+      address: '0x0277A46Cc69A57eE3A6C8c158bA874832F718B8E',
+      blockCreated: 25770160,
+    },
+  },
+})