fix(core): make take_from_foundation true by default across all clients

The flag was modelled as an opt-in non-standard rule but moving a card
off a foundation is in fact standard Klondike — disabling it is the
non-standard variant.

Changing the core default to true means every client (desktop, Android,
web) gets correct behaviour without each having to independently patch
the value after construction. Clients that expose a settings toggle
(desktop/Android) can still disable it through SettingsResource.

- game_state.rs: flip default from false → true in new_with_mode
- game_state.rs: rename/update take_from_foundation_disabled_by_default
  test to reflect the new intended default
- solitaire_wasm/lib.rs: remove now-redundant override in new()
  (from_saved keeps its override to fix old saves that serialised false)

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

solitaire_wasm/src/lib.rs

@@ -366,10 +366,9 @@ impl SolitaireGame {
         } else {
             DrawMode::DrawOne
         };
-        let mut game = GameState::new_with_mode(seed as u64, dm, GameMode::Classic);
-        // The web client has no settings layer; enable standard Klondike rule unconditionally.
-        game.take_from_foundation = true;
-        SolitaireGame { game }
+        SolitaireGame {
+            game: GameState::new_with_mode(seed as u64, dm, GameMode::Classic),
+        }
     }
 
     /// Full pile snapshot as a JS object.