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  follow-ups and never lets a superseded query replace follow-up memory.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.

src/layers/localAdsb/index.js

@@ -828,6 +828,40 @@ export function createLocalAdsbLayer({
       return enabled && selectMarker(`${ENTITY_PREFIX}${icao}`);
     },
 
+    /**
+     * Snapshot loaded locally received aircraft as plain JSON-safe records for the analyst
+     * query engine. On demand only (once per spoken query); [] while the
+     * layer is off.
+     * @param {number} [maxCount=Infinity] Most records to return.
+     * @returns {Array<Object>} {id, icao24, callsign, lat, lon, altitudeM, speedKts, heading, onGround}.
+     */
+    getAnalystRecords(maxCount = Infinity) {
+      if (!enabled) return [];
+      const num = (v) => (Number.isFinite(v) ? v : null);
+      const result = [];
+      for (const marker of markers.values()) {
+        if (result.length >= maxCount) break;
+        const record = marker.record || {};
+        const lat = marker.lat ?? record.lat;
+        const lon = marker.lon ?? record.lon;
+        if (!Number.isFinite(lat) || !Number.isFinite(lon)) continue;
+        result.push({
+          id: record.callsign || record.icao,
+          icao24: record.icao || null,
+          callsign: record.callsign || null,
+          lat,
+          lon,
+          altitudeM: Number.isFinite(record.altitudeFt)
+            ? Math.round(record.altitudeFt * 0.3048)
+            : null,
+          speedKts: num(record.groundSpeedKt),
+          heading: num(record.trackDeg),
+          onGround: record.onGround === true,
+        });
+      }
+      return result;
+    },
+
     getAllPositions(maxCount = 500) {
       return positionRows(maxCount);
     },