fix:parser and ui

src/transcript_cleaner.cpp

@@ -0,0 +1,33 @@
+#include "transcript_cleaner.h"
+
+#include <cctype>
+#include <string_view>
+
+std::string clean_transcript(std::string transcript) {
+  // Qwen3-ASR prefixes raw transcripts with the detected language and a text marker.
+  constexpr std::string_view kLanguagePrefix = "language ";
+  constexpr std::string_view kMarkers[] = {"<asr_text>", "<astext>"};
+
+  size_t prefix = 0;
+  if (transcript.compare(0, 3, "\xef\xbb\xbf") == 0) prefix = 3;
+  while (prefix < transcript.size() &&
+         std::isspace(static_cast<unsigned char>(transcript[prefix]))) {
+    prefix++;
+  }
+  if (transcript.compare(prefix, kLanguagePrefix.size(), kLanguagePrefix) != 0) {
+    return transcript;
+  }
+
+  size_t marker_position = std::string::npos;
+  std::string_view matched_marker;
+  for (std::string_view marker : kMarkers) {
+    const size_t position = transcript.find(marker, prefix + kLanguagePrefix.size());
+    if (position != std::string::npos &&
+        (marker_position == std::string::npos || position < marker_position)) {
+      marker_position = position;
+      matched_marker = marker;
+    }
+  }
+  if (marker_position == std::string::npos) return transcript;
+  return transcript.substr(marker_position + matched_marker.size());
+}