v0.2.9

Changed

• Voice commands are ordinary patron tool calls. The listener calls the operator's existing priced chart_show_chart (and chart_read_chart for "read") with the display owner's npub and dpop_token, and display as dictated - blank "Where?" is this Mac's agent_id. The operator relays the change and this (or the named) Mac's relay changes the chart and takes its picture; the listener never drives the chart. Only the Shortcut's free resolve and scale lookups are answered locally. "snapshot" is not bought by voice (a picture cannot be spoken).
• Siri answers within about 3 seconds: an early refusal (sign-in expired, balance too low, unknown or silent display) is spoken; otherwise the hand-off, "Chart PLTR at half scale sent to Mac-mini. Good luck." ("this Mac" when "Where?" was blank; no scale for "as is"). The call finishes in the background and its outcome is logged - tool, "Where?" and any refusal, never the token.
• An expired sign-in is spoken ("Your ChartRemotely sign-in expired. Answer the DM on your phone to renew.") and renewed in the background: one chart_request_npub_proof DM at a time, then chart_receive_npub_proof on a slowing schedule for about half an hour; the new token goes back into the Keychain.
• chartremotely setup keeps the DM proof's dpop_token as the voice sign-in, in the login Keychain (generic password "ChartRemotely voice sign-in", one per npub), and the owner's npub in the config as owner_npub. Its DM prompt suggests replying with a longer cache_duration (e.g. 30 days, or unlimited; default 2 hours). A Mac paired with a saved or made key, or already paired, is offered the DM sign-in too. The nsec is never asked for or stored.
• The voice Shortcut no longer says "On it, requesting your chart now…" before sending; it speaks only the listener's reply. Re-run chartremotely setup for the sign-in and the new Shortcut.

Removed

• forward.py: the listener no longer uses the operator's /agent/forward, and no longer runs a chart change on this Mac itself.

Merged

• Voice commands call the priced chart tool as a patron and hand off at once (#22)