main: before delete: draft + staged README.md + open terminal persisted
main: after archive/delete: draft=true terminal=true pendingFileOnServer=true attachments.delete=false
pr: before delete: draft + staged README.md + open terminal persisted
pr: after archive/delete: draft=false terminal=false pendingFileOnServer=false attachments.delete=true
pr: attachments.delete RPC returned Success
PASS: original bug reproduced on main; exact PR head clears browser and server state