fix: correct crispasr cache_ensure_file call + upload source label

cache_ensure_file() requires both filename and url. Use
registry_lookup_by_filename() to get the URL from CrispASR's built-in
registry before downloading, and surface a clear gr.Error if the model
name is unknown.

Also: show 'Source: uploaded file' instead of 'Download Method: yt-dlp'
in verbose output when the user uploads a file rather than a URL.

app.py

@@ -663,8 +663,9 @@ def transcribe_audio(audio_input, audio_url, proxy_url, proxy_username, proxy_pa
         else:
             logging.getLogger().setLevel(logging.WARNING)
 
-        logging.info(f"Transcription parameters: pipeline_type={pipeline_type}, model_id={model_id}, dtype={dtype}, batch_size={batch_size}, download_method={download_method}")
-        verbose_messages = f"Starting transcription with parameters:\nPipeline Type: {pipeline_type}\nModel ID: {model_id}\nData Type: {dtype}\nBatch Size: {batch_size}\nDownload Method: {download_method}\n"
+        logging.info(f"Transcription parameters: pipeline_type={pipeline_type}, model_id={model_id}, dtype={dtype}, batch_size={batch_size}")
+        source_label = f"Download Method: {download_method}" if (audio_url and audio_url.strip()) else "Source: uploaded file"
+        verbose_messages = f"Starting transcription with parameters:\nPipeline Type: {pipeline_type}\nModel ID: {model_id}\nData Type: {dtype}\nBatch Size: {batch_size}\n{source_label}\n"
 
         if verbose:
             yield verbose_messages, "", None
@@ -747,15 +748,20 @@ def transcribe_audio(audio_input, audio_url, proxy_url, proxy_username, proxy_pa
             elif pipeline_type == "crispasr":
                 actual_model_path = model_id
                 if model_id == "auto":
-                    # For demo purposes, we'll auto-resolve a decent model if 'auto' is picked
-                    # In a real CLI it would prompt, here we just pick qwen3-asr-0.6b
                     actual_model_path = "qwen3-asr-0.6b.gguf"
-                
-                # Check if it's a local file, if not try to ensure it's in cache
+
                 if not os.path.exists(actual_model_path):
-                    logging.info(f"Ensuring model {actual_model_path} is in cache...")
-                    actual_model_path = crispasr.cache_ensure_file(actual_model_path)
-                
+                    entry = crispasr.registry_lookup_by_filename(actual_model_path)
+                    if entry is None:
+                        raise gr.Error(
+                            f"Model '{actual_model_path}' not found in the CrispASR registry. "
+                            "Provide a local file path or choose a known model name."
+                        )
+                    logging.info(f"Downloading {entry.filename} (~{entry.approx_size}) from registry...")
+                    actual_model_path = crispasr.cache_ensure_file(entry.filename, entry.url)
+                    if not actual_model_path:
+                        raise gr.Error(f"Failed to download model '{model_id}' from {entry.url}.")
+
                 model_or_pipeline = crispasr.CrispASR(actual_model_path)
             else:
                 error_msg = "Invalid pipeline type"