Upload app.py

src/app.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import base64
 import os
 from pathlib import Path
 from typing import List
@@ -13,6 +14,19 @@ from pyvis.network import Network
 import streamlit.components.v1 as components
 
 HF_REPO_ID = os.environ.get("HF_REPO_ID", "")
+
+
+def csv_download_link(data: bytes, filename: str, label: str) -> None:
+    """st.download_button 대신 base64 HTML 링크로 다운로드 — 서버 연결 불필요."""
+    b64 = base64.b64encode(data).decode()
+    st.markdown(
+        f'<a href="data:text/csv;base64,{b64}" download="{filename}" '
+        f'style="display:block;text-align:center;padding:8px 12px;'
+        f'background:#1e293b;color:white;border-radius:8px;'
+        f'text-decoration:none;font-size:14px;width:100%;box-sizing:border-box;">'
+        f'{label}</a>',
+        unsafe_allow_html=True,
+    )
 HF_TOKEN   = os.environ.get("HF_TOKEN", "")
 
 st.set_page_config(page_title="CitationHub", page_icon="📚", layout="wide")
@@ -1149,11 +1163,7 @@ with tab_analytics:
         csv_seed = seed_filtered[
             ["title", "doi", "journal", "author", "country", "field", "citedby_count"]
         ].to_csv(index=False).encode("utf-8")
-        st.download_button(
-            "⬇ Seed Papers (CSV)",
-            csv_seed, "seed_papers.csv", "text/csv",
-            use_container_width=True,
-        )
+        csv_download_link(csv_seed, "seed_papers.csv", "⬇ Seed Papers (CSV)")
 
     with col_e2:
         _cite_cols = [c for c in
@@ -1167,16 +1177,8 @@ with tab_analytics:
                 "primary_intent": "intent", "context_count": "contexts",
                 "is_influential": "influential",
             }).to_csv(index=False).encode("utf-8"))
-        st.download_button(
-            "⬇ Citation Events (CSV)",
-            cite_export, "citation_events.csv", "text/csv",
-            use_container_width=True,
-        )
+        csv_download_link(cite_export, "citation_events.csv", "⬇ Citation Events (CSV)")
 
     with col_e3:
         intent_csv = intent_summary.to_csv(index=False).encode("utf-8")
-        st.download_button(
-            "⬇ Intent Summary (CSV)",
-            intent_csv, "intent_summary.csv", "text/csv",
-            use_container_width=True,
-        )
+        csv_download_link(intent_csv, "intent_summary.csv", "⬇ Intent Summary (CSV)")