Improvements and tests for live transcription.

src/App.tsx

@@ -9,7 +9,7 @@ import { ModelPicker } from "./components/ModelPicker";
 import { TranscriptView } from "./components/TranscriptView";
 import { TranscriptionOptions } from "./components/TranscriptionOptions";
 import { decodeAudioFile } from "./lib/audio";
-import { LiveTranscriber, type LiveTranscribeResult } from "./lib/live";
+import { LIVE_TUNING, LiveTranscriber, type LiveTranscribeResult } from "./lib/live";
 import { startMicCapture, type MicCapture } from "./lib/mic";
 import { getDownloadedModels } from "./lib/modelCache";
 import { registerServiceWorker } from "./pwa/register";
@@ -297,9 +297,7 @@ export function App() {
     // live. `.en` models take neither (same rule as the file flow).
     const options = (getModel(modelId)?.multilingual ?? false) ? { language, task } : {};
     const transcriber = new LiveTranscriber({
-      tentativeIntervalMs: 2500,
-      minTentativeSeconds: 2.0,
-      segmenter: { commitSilenceSeconds: 2.5, maxSegmentSeconds: 29 },
+      ...LIVE_TUNING,
       transcribe: (audio) => transcribeLiveSegment(worker, audio, options),
       onUpdate: (update) => {
         setLiveCommitted(update.committedText);