offers: curated 114; squash evidence whitespace at display

app/offers.py

@@ -220,6 +220,22 @@ def is_card_linked(off: Dict) -> bool:
     return bool(off.get("card_id") or (off.get("applies_to_issuer") or "").strip())
 
 
+def _display(s: Optional[str]) -> Optional[str]:
+    """A stored quote, made fit to show a person.
+
+    The evidence we bank is deliberately NOT whitespace-normalised: line breaks
+    are load-bearing for evidence_on_page(), which checks the quote part by part
+    so an offer whose headline and expiry sit on different lines still verifies.
+    27 of the 114 catalogue rows carry runs of newlines for that reason, and no
+    row has a `text` field, so this string IS what reaches the user - it rendered
+    as an offer note followed by seven blank lines.
+
+    So squash at the display boundary and leave the stored quote alone.
+    """
+    s = re.sub(r"\s+", " ", s or "").strip()
+    return s or None
+
+
 def best_open_offer(offs: List[Dict], amount: float, category: Optional[str] = None,
                     channel: Optional[str] = None):
     """Best discount available to ANYONE on this purchase, regardless of card.
@@ -239,7 +255,7 @@ def best_open_offer(offs: List[Dict], amount: float, category: Optional[str] = N
             continue
         val = offer_value(off, amount, category)
         if val > best:
-            best, note = val, off.get("text") or off.get("evidence") or None
+            best, note = val, _display(off.get("text") or off.get("evidence"))
     return best, note