Fix: write data to /tmp/smoke_signal (writable on HF Spaces)

smoke_signal_tab.py

@@ -35,7 +35,8 @@ import gradio as gr
 import pandas as pd
 
 # ── Paths ──────────────────────────────────────────────────────────────────────
-SS_ROOT      = Path(__file__).parent / "smoke_signal"
+# Use /tmp for all data — writable on HF Spaces, persists within a session
+SS_ROOT      = Path(os.environ.get("SS_DATA_ROOT", "/tmp/smoke_signal"))
 SOURCE_DIR   = SS_ROOT / "source_pdfs"
 MANIFEST_CSV = SS_ROOT / "manifest" / "source_manifest.csv"
 PROFILES_DIR = SS_ROOT / "manifest" / "page_profiles"