Merge branch 'main' into feat/voice-geometry

Picks up the HUD summary locale work (#1488). No conflicts; it changes no
voice prompt or tool description.

docs/CURRENT-STATE.md

@@ -5412,8 +5412,11 @@ and unreachable upstream (502/504) separately from road geometry.
 ### AI HUD Summary (June 2026)
 
 - HUD `SUMMARY` readout requests a five-word intelligence-style summary from `/api/openai/hud-summary` (model `OPENAI_HUD_SUMMARY_MODEL`, default `gpt-5-nano`, minimal reasoning).
-- Input is the live basemap label context (place/street/nearby-place labels + enabled layers) — the model is instructed not to infer from coordinates.
-- Output is sanitized to exactly five words; falls back to the deterministic telemetry summary on error/timeout (5s abort); typewriter animation on update.
+- Input: place/street/nearby-place labels, enabled layers and `feedProvenance`, with layer names as the user sees them; outside English the narration note and per-layer state ids are left out (`overall` carries the state). No model call without a place, street or nearby-place label: the deterministic line is shown.
+- Language: the HUD sends `locale` (part of the dedupe signature); the proxy keeps a shipped locale, English otherwise. Switching language in place drops the reply and aborts the request in flight, so the next tick asks again.
+- Reply: `{summary, feedState}` (`text.format` JSON schema, `feedState` a snapshot state or null). A view that is not nominal needs the matching `feedState`. The HUD adds its own translated tag, state first and layer names last (`STALE | … | LIVE FLIGHTS`), so the warning is never clipped. Outside English a reply falls back when it carries a feed-state id, a translated layer's English name or id, only Latin letters in a non-Latin language, or, with every feed healthy, the UNAVAILABLE word. `get_hud_caption` uses the same check and tag order, in English, and returns `feedState`.
+- The model is asked for at most five words; the proxy keeps up to 80 characters, or 20 for Japanese and Chinese, cut at a word boundary unless the first word is longer. It does not count words, since the model reads a name like Rue de Rivoli as one. Errors and the 5 s timeout fall back to the deterministic line; a camera move during typing shows that line instead of the fragment.
+- `partial` is a feed state of its own, ranked between `fallback` and `nominal`, so one partial layer, or partial plus nominal, reads partial, not off or nominal (HUD, voice view state, `analyst_query`, `brief`, the agent world packet). Its narration note says coverage is incomplete rather than not live.
 - A summary asked for before the camera starts moving never paints over the next view: `moveStart` marks the summary dirty and bumps its revision, as `moveEnd` does, aborts the request in flight and stops a reply still typing; neither a reply nor a fallback line (on an error, the 5 s timeout, the abort, or a failed context build) paints once the revision has moved. A dropped request forgets its signature and a timeout counts as a failure, so the next 15 s tick asks again even over the same place. An interrupted typewriter reply also forgets its signature; fully displayed answers remain reusable.
 
 ### Place-search providers