Update app.py

app.py

@@ -11,7 +11,7 @@ client         = openai.OpenAI(api_key=OPENAI_API_KEY)
 EMBED_MODEL = "text-embedding-3-small"
 CHAT_MODEL  = "gpt-4o-mini"
 CHUNK_SIZE  = 100
-OVERLAP     = 40
+OVERLAP     = 60
 TOP_K       = 2
 
 # ── GLOBALS ──────────────────────────────────────────────────────────────────