feat(voice): voice core — honest layer reach, spoken summary with on-screen card, narration, point-and-ask

- Voice layer manifest (src/voice/layerManifest.js) generates the layer enums,
  aliases and analyst field hints; a test fails when a catalog layer has no entry.
- analyst_query validates fields, operators, units, values and scopes, counts up
  to 250,000 loaded records per layer, reports complete/partial/unanswered, tells
  LAYER_OFF / NOT_READY / FEED_UNAVAILABLE apart from zero, refuses mismatched
  follow-ups and never lets a superseded query replace follow-up memory. Seven
  more layers expose analyst records.
- Tool results carry a code-built say line and a display card; the voice card in
  the mic control shows captions, plan steps and the result
  (src/voice/resultDisplay.js is the one adapter). Slow tools narrate their
  current step out of band; holding Space while the assistant talks cuts it off.
  Turn spans go to the debug log; caption transcription is metered; the log
  omits what was said unless GEV_VOICE_LOG_CONTENT=1.
- Point and ask: the Space-down pointer snapshot resolves "this", "that one" and
  "around here" through 'pointer' targets, and "the second one" through
  referent:n from the last numbered list.
- Prompt states each policy once (instructions + tools 48.5k -> 46.7k chars).
- Voice benchmark harness (scripts/qa-voice-bench.mjs, scripts/voice-bench/)
  shares its phrase table and grading with scripts/qa-voice-routing.mjs.

.env.example

@@ -64,6 +64,13 @@ OPENAI_REALTIME_REASONING_EFFORT=low
 # Keep only a short conversational window. Current map state is fetched live.
 OPENAI_REALTIME_CONTEXT_TOKENS=3000
 OPENAI_REALTIME_CONTEXT_RETENTION=0.5
+# Voice-card captions of what you said. Billed separately by OpenAI and
+# counted in the session cost meter and cap; off disables them.
+OPENAI_REALTIME_TRANSCRIBE_MODEL=gpt-4o-mini-transcribe
+# The voice debug log (.gev-logs/realtime-conversations.jsonl, rotated at
+# 32 MB, never expired) omits transcripts and typed or spoken text by default.
+# Set to 1 to keep them while debugging; delete the log when you are done.
+GEV_VOICE_LOG_CONTENT=
 OPENAI_HUD_SUMMARY_MODEL=gpt-5-nano
 # Optional: opt-in per-IP rate limit for the OpenAI cost endpoints
 # (/api/realtime/token + /api/openai/hud-summary), in requests per minute.