The HUD builds place context for its AI summary whenever the camera
settles, and each build paid for up to four reverse geocodes plus a Nearby
Places search, even when no OpenAI key was configured to use them.
- Ask GET /api/openai/hud-summary/status once; with no summary configured,
or after an unconfigured reply, make no place lookups for the page.
- Reverse-geocode at most two points: the view center and one viewport
point.
- Reuse a lookup until the view center moves a quarter of the visible
width, the camera's distance to it doubles or halves, or the camera
crosses a lookup height. The reused points are asked again, so only a
timeout, failure or empty answer spends.
- Repaint the last AI reply when a small pan leaves the context unchanged.
Cached-only hosts and voice context lookups are unchanged.
