fix: strip code blocks before Piper HI TTS — prose only

app.js

@@ -93,8 +93,9 @@ window.speakText = function(text) {
         .replace(/#{1,6}\s/g, "")
         .replace(/\*\*/g, "")
         .replace(/\*/g, "")
-        .replace(/`{1,3}/g, "")
-        .replace(/🎯|💻|🔍|⚠️|🚀|💡/g, "")
+        .replace(/```[\s\S]*?```/g, "")
+        .replace(/`[^`]+`/g, "code snippet")
+	.replace(/🎯|💻|🔍|⚠️|🚀|💡/g, "")
         .replace(/\[([^\]]+)\]\([^)]+\)/g, "$1")
         .trim();
     // Non-English: translate via backend then speak via Piper TTS