feat: use new ui bubbletea

internal/transcriber/adapter_deepgram_batch.go

@@ -118,8 +118,9 @@ func (a *DeepgramBatchAdapter) buildURL() (string, error) {
 	q.Set("punctuate", "true")
 
 	// add language if specified
-	if a.language != "" {
-		q.Set("language", a.language)
+	lang := normalizeDeepgramLanguage(a.language)
+	if lang != "" {
+		q.Set("language", lang)
 	}
 
 	if len(a.keywords) > 0 {