fix(codex): close stdin and filter benign stdin stderr

feat: split codex flags into independent checkboxes

fix: codex fullAuto uses --full-auto --ask-for-approval never --sandbox danger-full-access

feat: integrate opencli runtime and seed starter template

feat: improve external session handling and delete policies

feat(create-agent): runtime model dropdown and provider-specific model apply

Merge remote-tracking branch 'origin/main'

docs: clarify auto external import and clone-with-context design

feat: auto-compact large sessions before agent stop

feat(scanner): support codex external session import and tail sync

Merge PR #7 with runtime CLI reasoning effort detection

Improve local-first setup and provider instruction files

fix reasoning effort options

docs: add file attachment feature to README and docs

fix: defer file upload to send time instead of paste time