Harden Supabase URL and explanation fallback

src/ml/predict.py

@@ -29,6 +29,8 @@ def explain_linear_top_features(
     Returns top_k feature contributions for `class_label` on the first row of X.
     Contributions are in logit units (not probability).
     """
+    if "text" not in model.named_steps:
+        return ["Feature explanations unavailable for this model."]
     text = model.named_steps["text"]
     clf = model.named_steps["clf"]
 
@@ -73,4 +75,4 @@ def predict_one_with_reasons(model: Pipeline, subject: str, body: str, top_k: in
     reasons = explain_linear_top_features(model, X, class_label=label, top_k=top_k)
     return label, confidence, probs, reasons
 
-   
+   

src/store/supabase_io.py

@@ -7,7 +7,9 @@ from supabase import create_client
 
 
 def make_supabase_client():
-    url = os.environ["SUPABASE_URL"]
+    url = os.environ["SUPABASE_URL"].strip()
+    if not url.endswith("/"):
+        url = f"{url}/"
     key = os.environ["SUPABASE_ANON_KEY"]  
     return create_client(url, key)
 
@@ -50,4 +52,4 @@ def download_artifact(
 
     data = supabase.storage.from_(bucket).download(object_path)  # bytes
     lp.write_bytes(data)
-    return lp
+    return lp