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/songbirdTestnet.ts

@@ -0,0 +1,22 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const songbirdTestnet = /*#__PURE__*/ defineChain({
+  id: 16,
+  name: 'Songbird Testnet Coston',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'Coston Flare',
+    symbol: 'CFLR',
+  },
+  rpcUrls: {
+    default: { http: ['https://coston-api.flare.network/ext/C/rpc'] },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Coston Explorer',
+      url: 'https://coston-explorer.flare.network',
+      apiUrl: 'https://coston-explorer.flare.network/api',
+    },
+  },
+  testnet: true,
+})