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/zksync/utils/camelCaseKeys.ts

@@ -0,0 +1,11 @@
+export function camelCaseKeys(response: object): object {
+  if (!response) return response
+  if (typeof response !== 'object') return response
+  if (Array.isArray(response)) return response.map(camelCaseKeys)
+  return Object.fromEntries(
+    Object.entries(response).map(([key, value]) => [
+      key.replace(/_([a-z])/g, (_, letter) => letter.toUpperCase()),
+      camelCaseKeys(value),
+    ]),
+  )
+}