test(web): follow current recent chats semantics

[gcharang]

Summary

• wait for hydration before the paid live test interacts with the connect and chat routes
• locate recent chats through the current navigation/group accessibility structure
• use the deterministic suite's 15-second hydration allowance

Evidence

The isolated release gate at 9c5de95a380a05981c5dec400950ffbf0c288de6 completed upload, durable ingestion, cited SSE chat, feedback, document detail, and persisted thread creation. It stopped before tagging because the final history assertion expected the removed complementary landmark; the live accessibility tree exposes navigation "Side navigation" > group "Recent chats".

Verification

• make web-check
• git diff --check
• pre-push React Doctor: 100/100
• deterministic Playwright: 14 passed, 1 skipped, 6 failed from a local Vite client-entry import/watcher failure unrelated to this paid-only test; repository CI is the authoritative clean-run gate

No tag or release has been created. The disposable live project and volumes were removed, and the prior normal-stack services were restored.