Fix invalid Elm record pattern in ManyDecks instance picker

Elm 0.19 does not support field aliasing in record destructuring patterns
({ field = alias } is not valid syntax). Use a plain argument and access
fields with dot notation instead.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/src/elm/MassiveDecks/Card/Source/ManyDecks.elm

@@ -120,10 +120,10 @@ editor ref shared _ update submit noOp =
         instancePicker =
             if List.length instances > 1 then
                 let
-                    toItem { baseUrl, name = instanceName } =
-                        { id = baseUrl
+                    toItem instance =
+                        { id = instance.baseUrl
                         , icon = Nothing
-                        , primary = [ Html.text instanceName ]
+                        , primary = [ Html.text instance.name ]
                         , secondary = Nothing
                         , meta = Nothing
                         }