- export now shares _add_session_filter_args / build_prune_filters with
prune/archive: AGE grammar (5h/2d/1w/ISO) on --older-than plus the full
filter set (--model, --provider, --min-messages, --min-cost, --branch,
--chat-id, ...) for both JSONL and md/qmd bulk exports; --dry-run works
on JSONL too; removes the one-off list_export_candidates helper.
- new --redact flag runs exported message content and tool output through
force-mode secret redaction (agent.redact) for jsonl, md, and qmd.
- docs EN + zh-Hans updated; new tests for AGE grammar, extended filters,
filtered JSONL, and redaction.
Replaces the parallel export-md subcommand from the salvaged commit with
a --format jsonl|md|qmd flag on the existing export subcommand, so all
session export formats share one surface. Adds AUTHOR_MAP entry.
Salvage follow-up for PR #59542 by @web3blind.
