Upload app.py

app.py

@@ -229,40 +229,54 @@ def process_uploads(files, progress=gr.Progress()) -> str:
 # ── Chat ─────────────────────────────────────────────────────────────
 
 def chat_respond(message: str, history: List) -> Tuple[List, str]:
+    """
+    Handles the chat logic using the modern Gradio 'messages' format (list of dicts).
+    """
     if not _system_ready or _qa is None:
-        history.append((message, "⚠️ System not ready. Upload PDF files or wait for pre-built data to load."))
+        history.append({"role": "user", "content": message})
+        history.append({
+            "role": "assistant",
+            "content": "⚠️ System not ready. Please upload PDF files or wait for the pre-built graph to finish loading."
+        })
         return history, ""
 
     try:
         start = time.time()
+        # Perform GraphRAG QA
         result = _qa.answer(message, top_k=8, use_communities=True)
         elapsed = time.time() - start
 
+        # Construct the response text
         response_parts = [result.answer]
 
         if result.sources:
             response_parts.append("\n\n---\n**📚 Sources:**")
             for i, src in enumerate(result.sources[:5], 1):
                 scores = []
-                if src.dense_score > 0:
-                    scores.append(f"dense={src.dense_score:.2f}")
-                if src.sparse_score > 0:
-                    scores.append(f"sparse={src.sparse_score:.2f}")
-                if src.graph_score > 0:
-                    scores.append(f"graph={src.graph_score:.2f}")
+                if src.dense_score > 0: scores.append(f"dense={src.dense_score:.2f}")
+                if src.sparse_score > 0: scores.append(f"sparse={src.sparse_score:.2f}")
+                if src.graph_score > 0: scores.append(f"graph={src.graph_score:.2f}")
+
                 score_str = f" ({', '.join(scores)})" if scores else ""
                 response_parts.append(
                     f"{i}. **{src.title[:60]}** — p.{src.page} — score: {src.score:.4f}{score_str}"
                 )
 
-        response_parts.append(f"\n*Confidence: {result.confidence:.0%} | Time: {elapsed:.2f}s | {', '.join(result.reasoning)}*")
+        response_parts.append(
+            f"\n*Confidence: {result.confidence:.0%} | Time: {elapsed:.2f}s | {', '.join(result.reasoning)}*"
+        )
+
+        full_response = "\n".join(response_parts)
 
-        response = "\n".join(response_parts)
-        history.append((message, response))
+        # Append to history using dictionary format
+        history.append({"role": "user", "content": message})
+        history.append({"role": "assistant", "content": full_response})
 
     except Exception as e:
-        history.append((message, f"❌ Error: {str(e)}"))
+        history.append({"role": "user", "content": message})
+        history.append({"role": "assistant", "content": f"❌ Error: {str(e)}"})
 
+    # Return updated history and an empty string to clear the input textbox
     return history, ""