Update app.py

app.py

@@ -22,10 +22,10 @@ from transformers import pipeline
 # Config (easy knobs)
 # ----------------------------
 EMBED_MODEL_ID = "sentence-transformers/all-MiniLM-L6-v2"
-GEN_MODEL_ID   = "google/flan-t5-small"
+GEN_MODEL_ID   = "Qwen/Qwen2.5-0.5B-Instruct"
 
-CHUNK_SIZE    = 500
-CHUNK_OVERLAP = 100
+CHUNK_SIZE    = 300
+CHUNK_OVERLAP = 50
 TOP_K         = 3
 
 # ----------------------------