BootNodeDev/canton-dappbooster: canton-connect/architecture/popup-close-guard.md

# The popup close guard `guardedConnect.ts` wraps `sdk.connect()` when the SDK's own popup picker is in use. All of it rests on `dapp-sdk` internals, so this chapter is the why: what the SDK misses, what the guard does, and where it breaks. The bump procedure it justifies is in [`../CLAUDE.md`](../C