fix(audio): prime Safari mic graph; use raw PCM fallback; stabilize teardown

Route mic source through analyser into a silent sink to force processing on Safari/WebKit.

Add ScriptProcessorNode raw-PCM capture path for reliable RMS/entropy sampling.

Clamp/scale levels to avoid Infinity/opacity warnings and improve UI thresholds.

Deduplicate/guard AudioContext shutdown to prevent “Cannot close a closed AudioContext”.

Improve logging around context state, pipeline init, and capture source selection.

src/App.tsx

@@ -33,6 +33,7 @@ import CameraEntropy from './components/CameraEntropy';
 import DiceEntropy from './components/DiceEntropy';
 import { InteractionEntropy } from './lib/interactionEntropy';
 
+import AudioEntropy from './AudioEntropy';
 console.log("OpenPGP.js version:", openpgp.config.versionString);
 
 interface StorageItem {
@@ -736,6 +737,17 @@ function App() {
                           </div>
                         )}
 
+                        {/* Audio Entropy Component */}
+                        {entropySource === 'audio' && !generatedSeed && (
+                          <AudioEntropy
+                            key={`audio-${resetCounter}`}
+                            wordCount={seedWordCount}
+                            onEntropyGenerated={handleEntropyGenerated}
+                            onCancel={() => setEntropySource(null)}
+                            interactionEntropy={interactionEntropyRef.current}
+                          />
+                        )}
+
                         {/* Generated Seed Display + Destination Selector */}
                         {generatedSeed && (
                           <div className="space-y-4">