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/dchainTestnet.ts

@@ -0,0 +1,28 @@
+import { chainConfig } from '../../op-stack/chainConfig.js'
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const dchainTestnet = /*#__PURE__*/ defineChain({
+  ...chainConfig,
+  id: 2713017997578000,
+  name: 'Dchain Testnet',
+  nativeCurrency: { name: 'Ether', symbol: 'ETH', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: [
+        'https://dchaintestnet-2713017997578000-1.jsonrpc.testnet.sagarpc.io',
+      ],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Dchain Explorer',
+      url: 'https://dchaintestnet-2713017997578000-1.testnet.sagaexplorer.io',
+      apiUrl:
+        'https://api-dchaintestnet-2713017997578000-1.testnet.sagaexplorer.io/api',
+    },
+  },
+  contracts: {
+    ...chainConfig.contracts,
+  },
+  testnet: true,
+})