edge case

app.py

@@ -75,7 +75,7 @@ def process_ocr_qa(text, lang_choice):
                 if 'unknown_tokens' in diagnostics and diagnostics['unknown_tokens']:
                     unknown_tokens = diagnostics['unknown_tokens']
                     output_lines.append(f"❌ Unrecognized unique tokens ({u}):\n{' '.join(unknown_tokens)}")
-                elif 'unknown_tokens' in diagnostics:
+                elif 'unknown_tokens' in diagnostics and total > 0:
                     output_lines.append("✨ All tokens were known – no OCR errors detected.")
                 
                 # Model information