- Typing: type_text_into_active_context now uses variable, human-like
inter-keystroke gaps from humanize::keystroke_delays when no explicit --delay
is given (Fast/Human); Off stays instant. Explicit --delay still wins.
- CLI: `--humanize off|fast|human` surfaces AGENT_BROWSER_HUMANIZE so the
session's daemon (a child that inherits this env) applies it, overriding the
adaptive detector. Invalid values warn and are ignored.
Verified headless: `--humanize human` + type lands "hello world" correctly.
Deferred: in-bbox landing jitter (helper ready, needs bbox threaded) + wheel/drag
easing.