Restore configured terminal history on reconnect, retaining 10,000 rows plus the screen. Serialize the worker-owned xterm buffer directly to ANSI and forward negotiated bounded replay chunks while preserving ANSI-era clients and per-viewer live ordering.
Preserve captured geometry through replay, bound pressure recovery to 500 rows, and keep the omitted visible-history default at 200. Remove the full cell-grid copy and obsolete JSON rendering.
All 21 CI checks pass. Real browser, native Debug emulator/simulator and Linux Electron coverage and platform limits are documented in the PR. The Android Debug invalid native delegate dispatch also reproduces on upstream main; its cause and any change in frequency remain unproven.
Credit Manav Dhindsa (DrakenKor), #6139 and #6148, and Lennart Schoch, #6743, for prior ANSI replay and retention work informing this change.
Closes#6137.
Closes#6147.