Update app.py

app.py

@@ -64,12 +64,14 @@ def extract_image_caption(path: str) -> str:
         return vision_client.image_to_text(img)
 
 
-def process_pdf(pdf_path: str) -> str:
+def process_pdf(local_path: str) -> str:
     """Ingest a local PDF file, extract text & images, chunk, embed, and index."""
     global vector_store, qa_chain
 
     # Move the uploaded PDF into our PDFs folder
-    src = Path(pdf_path)
+    src = Path(local_path)
+    if src.suffix.lower() != ".pdf":
+        return "❗ Error: Uploaded file is not a PDF."
     dest = PDF_DIR / src.name
     src.rename(dest)
 
@@ -113,11 +115,8 @@ with gr.Blocks() as demo:
     gr.Markdown("## 📄📷 Multimodal RAG — Hugging Face Spaces")
 
     with gr.Row():
-        pdf_in = gr.File(
-            label="Upload PDF",
-            file_types=["pdf"],
-            type="filepath"
-        )
+        # just accept any local file; we check for .pdf in process_pdf()
+        pdf_in = gr.File(label="Upload PDF", type="filepath")
         btn_proc = gr.Button("Process PDF")
         status = gr.Textbox(label="Status")