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/unichainSepolia.ts

@@ -0,0 +1,52 @@
+import { chainConfig } from '../../op-stack/chainConfig.js'
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+const sourceId = 11_155_111 // sepolia
+
+export const unichainSepolia = /*#__PURE__*/ defineChain({
+  ...chainConfig,
+  id: 1301,
+  name: 'Unichain Sepolia',
+  nativeCurrency: {
+    name: 'Ether',
+    symbol: 'ETH',
+    decimals: 18,
+  },
+  blockTime: 1_000,
+  rpcUrls: {
+    default: {
+      http: ['https://sepolia.unichain.org'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Uniscan',
+      url: 'https://sepolia.uniscan.xyz',
+      apiUrl: 'https://api-sepolia.uniscan.xyz/api',
+    },
+  },
+  contracts: {
+    ...chainConfig.contracts,
+    multicall3: {
+      address: '0xca11bde05977b3631167028862be2a173976ca11',
+      blockCreated: 0,
+    },
+    portal: {
+      [sourceId]: {
+        address: '0x0d83dab629f0e0F9d36c0Cbc89B69a489f0751bD',
+      },
+    },
+    l1StandardBridge: {
+      [sourceId]: {
+        address: '0xea58fcA6849d79EAd1f26608855c2D6407d54Ce2',
+      },
+    },
+    disputeGameFactory: {
+      [sourceId]: {
+        address: '0xeff73e5aa3B9AEC32c659Aa3E00444d20a84394b',
+      },
+    },
+  },
+  testnet: true,
+  sourceId,
+})