backend: airline/chain-direct offers in flight+hotel HTTP scoring

app/main.py

@@ -188,6 +188,13 @@ class FlightSellersRequest(BaseModel):
     held_cards: Optional[List[str]] = None
     persona: Optional[List[str]] = None
     city: Optional[str] = None
+    # The picked flight's airline, so the DIRECT channel scores that airline's
+    # own offers (Air India's flat Rs3,000 Axis discount, etc.) - the on-device
+    # app passes this via airlineBrandKey; without it the endpoint's optional
+    # comparison scored the airline website with no airline and missed those
+    # deals (2026-08-11 international app-vs-endpoint test). Optional: an older
+    # client that omits it gets exactly the prior behaviour.
+    airline: Optional[str] = None
     include_comparison: Optional[bool] = False   # app scores on-device by default
 
 
@@ -224,6 +231,9 @@ class HotelSellersRequest(BaseModel):
     adults: Optional[int] = 2
     held_cards: Optional[List[str]] = None
     persona: Optional[List[str]] = None
+    # The picked property's name, so the DIRECT channel scores that chain's own
+    # offers (Marriott/IHG etc.) - mirror of the app's hotelBrandKey. Optional.
+    property_name: Optional[str] = None
     include_comparison: Optional[bool] = False
 
 
@@ -498,7 +508,7 @@ def flights_search(req: FlightSearchRequest, request: Request = None):
         _limit(request, "flt", rate=30)     # 30/min per IP per worker
     import flights_provider
     import flight_sellers
-    from channels import compare_channels
+    from channels import compare_channels, airline_brand_key
     from availability import normalize_city
 
     held = req.held_cards or demo_data.DEMO_WALLET
@@ -564,7 +574,9 @@ def flights_search(req: FlightSearchRequest, request: Request = None):
     for f in flights:
         cmp = compare_channels(
             held, "travel_flights", float(f["fare_inr"]),
-            brand_key=None, merchant=None, rail="card",
+            # This flight's own airline, so "Airline website" scores that
+            # carrier's offers. Mirror of the app's per-row airlineBrandKey.
+            brand_key=airline_brand_key(f.get("airline")), merchant=None, rail="card",
             persona=persona, city=city, international=intl,
             # The party this search is for. Without it the server always scored
             # 1 passenger one-way while the app scored the real party, so the two
@@ -616,7 +628,7 @@ def flights_sellers(req: FlightSellersRequest, request: Request = None):
     if request is not None:
         _limit(request, "fls", rate=20)     # 20/min per IP per worker
     import flight_sellers
-    from channels import compare_channels
+    from channels import compare_channels, airline_brand_key
     from availability import normalize_city
     import geo
 
@@ -633,7 +645,9 @@ def flights_sellers(req: FlightSellersRequest, request: Request = None):
         base = min(data["channel_prices"].values()) if data["channel_prices"] else 0.0
         cmp = compare_channels(
             held, "travel_flights", float(base),
-            brand_key=None, merchant=None, rail="card",
+            # The picked flight's airline (sent by the client), so the direct
+            # channel scores that carrier's offers - matches the app.
+            brand_key=airline_brand_key(req.airline), merchant=None, rail="card",
             persona=req.persona or demo_data.DEMO_PERSONA,
             city=normalize_city(req.city),
             international=geo.route_is_international(req.src, req.dst),
@@ -691,7 +705,7 @@ def hotels_search(req: HotelSearchRequest, request: Request = None):
     if request is not None:
         _limit(request, "htl", rate=30)
     import hotels_provider
-    from channels import compare_channels
+    from channels import compare_channels, hotel_brand_key
     from availability import normalize_city
 
     held = req.held_cards or demo_data.DEMO_WALLET
@@ -717,7 +731,8 @@ def hotels_search(req: HotelSearchRequest, request: Request = None):
     for h in hotels:
         cmp = compare_channels(
             held, "travel_hotels", float(h["price_inr"]),
-            brand_key=None, merchant=None, rail="card",
+            # This property's chain, so "Hotel directly" scores its own offers.
+            brand_key=hotel_brand_key(h.get("name")), merchant=None, rail="card",
             persona=persona, city=city, international=intl,
         ) if want_cmp else None
         results.append({"hotel": h, "channel_comparison": cmp})
@@ -749,7 +764,7 @@ def hotels_sellers(req: HotelSellersRequest, request: Request = None):
     if request is not None:
         _limit(request, "hts", rate=20)
     import hotel_sellers
-    from channels import compare_channels
+    from channels import compare_channels, hotel_brand_key
     from availability import normalize_city
     import geo
 
@@ -763,7 +778,9 @@ def hotels_sellers(req: HotelSellersRequest, request: Request = None):
         base = min(data["channel_prices"].values())
         cmp = compare_channels(
             held, "travel_hotels", float(base),
-            brand_key=None, merchant=None, rail="card",
+            # The picked property's chain (sent by the client), so the direct
+            # channel scores its own offers - matches the app.
+            brand_key=hotel_brand_key(req.property_name), merchant=None, rail="card",
             persona=req.persona or demo_data.DEMO_PERSONA,
             city=normalize_city(req.city) or req.city,
             international=geo.city_is_international(req.city),