refactor: remove card.rs / card_to_id; use card_game::Card directly (#83)

card_to_id was a frankenstein 0..=51 id shim. Replace it with card_game::Card:
- feedback_anim deal jitter now seeds off a hash of the Card itself
- radial_menu RightClickRadialState.cards: Vec<u32> -> Vec<Card>
- wasm CardSnapshot.id: u32 -> Card (serialises transparently as a plain JS
  number, the same opaque key the renderer already used; new test asserts the
  JSON id field is a number)
- wasm DebugInvariantReport deck-completeness check reworked from a [bool;52]
  index into a HashSet<Card> + Card::new reference deck; the out-of-range check
  is dropped since a Card is always valid

Delete card.rs entirely: the Card/Deck/Rank/Suit re-exports move to the crate
root and the 69 `solitaire_core::card::` import paths flatten to `solitaire_core::`.

The JS card.id is purely an opaque identity key (Map key / dataset.cardId, no
arithmetic, card faces render from rank+suit), so the value change is safe.
cargo test --workspace and clippy --workspace --all-targets -- -D warnings green.

Closes #83

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

solitaire_core/src/card.rs

@@ -1,23 +0,0 @@
-pub use card_game::{Card, Deck, Rank, Suit};
-
-/// Maps a [`Card`] to a stable `0..=51` numeric identity, independent of the
-/// upstream `card_game::Card` bit-packing.
-///
-/// Encoding: `suit_index * 13 + (rank as u32 - 1)`, where `suit_index` is
-/// Clubs=0, Diamonds=1, Hearts=2, Spades=3 and `rank` is 1 (Ace) ..= 13 (King).
-/// The deck id is intentionally ignored so the id depends only on the visible
-/// face.
-///
-/// This is the single source of truth shared by `CardEntity` numeric tracking,
-/// deterministic per-card animation jitter, and the WASM replay layer — those
-/// must agree byte-for-byte so replay snapshots are identical across the
-/// desktop and browser builds.
-pub fn card_to_id(card: &Card) -> u32 {
-    let suit_index: u32 = match card.suit() {
-        Suit::Clubs => 0,
-        Suit::Diamonds => 1,
-        Suit::Hearts => 2,
-        Suit::Spades => 3,
-    };
-    suit_index * 13 + (card.rank() as u32 - 1)
-}

solitaire_core/src/lib.rs

@@ -1,5 +1,4 @@
 pub mod achievement;
-pub mod card;
 pub mod error;
 pub mod game_state;
 pub mod klondike_adapter;
@@ -12,7 +11,7 @@ pub mod klondike_adapter;
 // re-exported — they are only used internally (in `klondike_adapter.rs` and
 // when decoding instructions to piles in `instruction_to_piles`) and do not
 // appear in any public method signature.
-pub use card_game::{Card, Session, SolveError};
+pub use card_game::{Card, Deck, Rank, Session, SolveError, Suit};
 pub use klondike::{DrawStockConfig, Foundation, Klondike, KlondikeInstruction, KlondikePile, Tableau};
 
 // Solvability check API (delegates to `card_game::Session::solve`); replaces the