Add local spoken passages with Google retrieval and isolated runtime setup

apps/desktop/tests/match-display.test.mjs

@@ -74,6 +74,9 @@ test('optional reasons use real source routes and never claim semantic word conf
   assert.match(text.legend,/without the same words/);
   assert.equal(text.semanticPassage,true);
   assert.match(matchExplanation({match_kind:'semantic_audio',source:{kind:'timestamp_ms',number:13129}}).reason,/0:13.*not an exact spoken phrase/);
+  const speech=matchExplanation({match_kind:'semantic_speech',source:{kind:'timestamp_ms',number:13129}});
+  assert.match(speech.reason,/0:13.*estimated token position/);
+  assert.equal(speech.semanticPassage,true);
   assert.match(matchExplanation({match_kind:'semantic_video',source:{kind:'timestamp_ms',number:24167}}).reason,/frame.*0:24/);
   assert.match(matchExplanation({match_kind:'semantic_image'}).reason,/whole/);
   assert.match(matchExplanation({match_kind:'name_terms'}).reason,/filename, path or content/);