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  follow-ups and never lets a superseded query replace follow-up memory.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/data/pickRegistry.js

@@ -65,6 +65,23 @@ export function unregisterPickOwner(layerId) {
   _owners.delete(layerId);
 }
 
+/**
+ * The registered layer that owns a picked id, or null.
+ * @param {string} pickedId - Canonical pick id from {@link resolvePickId}.
+ * @returns {string|null} Owning layer id.
+ */
+export function findPickOwner(pickedId) {
+  if (!pickedId) return null;
+  for (const [ownerId, predicate] of _owners) {
+    try {
+      if (predicate(pickedId)) return ownerId;
+    } catch {
+      // a broken predicate must never break picking
+    }
+  }
+  return null;
+}
+
 /**
  * True when some OTHER registered layer owns the picked id.
  * @param {string} layerId - The asking layer's id (excluded from the scan).