fix: handle None values in length sliders

summarizer/summarize.py

@@ -11,6 +11,10 @@ def generate_summary(text=None, file=None, min_length=30, max_length=100, do_sam
 
     if not content or len(content.split()) < INPUT_MIN_SIZE:
         return "⚠️ Input too short or empty."
+
+    # Fallback defaults if somehow None is passed
+    min_len = min_len or 30
+    max_len = max_len or 100
     
     # Model selection based on language detection
     lang = detect_language(content)