fix(client): address CI and review findings on blank-session reuse

- docs: fix cross-class note links (../feature/...), mirror the membership
  reuse criterion in README.zh.md and the connectWorkspace architecture
  note (EN/ZH/sidecars re-recorded)
- test(client): stray + member blank at the same path — the scan skips the
  stray and reuses the member
- test(web): re-registration after delete now mints a fresh blank session
  (the old cwd-only reuse is gone), so the account is no longer empty;
  assert the retained seeded session is still not re-adopted

packages/client/runtime/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/client/runtime/README.md
-README.md: dd780369a1d888dde2579e436afe2ce1e6dcfdd1
-README.zh.md: 5574ad6452c6a2d94fb63da7e53b98e8d074f1c9
+README.md: adcc9595bbf6865f1a01eedf9eead1da5d4b5657
+README.zh.md: 5857b929e5a2535420a46b6933ec0497fb1ff117