Add debug output to OCR step

smoke_signal_tab.py

@@ -683,12 +683,18 @@ def _profile_status_html() -> str:
 def run_ocr() -> tuple:
     """Run Surya OCR on all profiled PDFs."""
     df = load_manifest_df()
+    debug = f"[DEBUG] SS_ROOT={SS_ROOT}\nMANIFEST_CSV={MANIFEST_CSV}\nCSV exists={MANIFEST_CSV.exists()}\n"
+    if not df.empty:
+        debug += f"Manifest rows={len(df)}\nStatuses={df['status'].value_counts().to_dict()}\n"
+    else:
+        debug += "Manifest is EMPTY\n"
+
     if df.empty:
-        return _ocr_status_html(), "No sources. Complete Steps 1-2 first."
+        return _ocr_status_html(), debug + "No sources. Complete Steps 1-2 first."
 
     eligible = df[df["status"] == "profiled"]
     if eligible.empty:
-        return _ocr_status_html(), "No profiled PDFs. Complete Step 2 first."
+        return _ocr_status_html(), debug + "No profiled PDFs. Complete Step 2 first."
 
     log = []