refactor: replace local DrawMode with upstream klondike::DrawStockConfig (#82)

DrawMode was a 1:1 mirror of klondike::DrawStockConfig (DrawOne/DrawThree).
Delete it and use the upstream type everywhere; re-export DrawStockConfig from
solitaire_core. config_for assigns draw_stock directly and draw_mode() returns
session.config().inner.draw_stock.

Serde is unchanged — DrawStockConfig serialises to the same "DrawOne"/"DrawThree"
named variants, so persisted game_state.json / replay JSON stay byte-compatible
(no migration). Field/method/variable names containing draw_mode are unchanged.

35 files, mechanical type swap across all crates. Implemented via a multi-agent
workflow (core → per-crate consumers → verify). cargo test --workspace and
clippy --workspace --all-targets -- -D warnings green.

Closes #82

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

solitaire_engine/src/game_plugin.rs

@@ -14,7 +14,7 @@ use bevy::prelude::*;
 use bevy::tasks::{AsyncComputeTaskPool, Task, futures_lite::future};
 use bevy::window::AppLifecycle;
 use solitaire_core::KlondikePile;
-use solitaire_core::{DrawMode, game_state::{GameMode, GameState}};
+use solitaire_core::{DrawStockConfig, game_state::{GameMode, GameState}};
 use solitaire_core::{DEFAULT_SOLVE_MOVES_BUDGET, DEFAULT_SOLVE_STATES_BUDGET};
 #[allow(deprecated)]
 use solitaire_data::latest_replay_path;
@@ -157,12 +157,12 @@ impl Plugin for GamePlugin {
             .is_some_and(|g| g.move_count() > 0 && !g.is_won());
         let (initial_state, pending_restore) = if prompt_worthy {
             (
-                GameState::new(seed_from_system_time(), DrawMode::DrawOne),
+                GameState::new(seed_from_system_time(), DrawStockConfig::DrawOne),
                 saved,
             )
         } else {
             (
-                saved.unwrap_or_else(|| GameState::new(seed_from_system_time(), DrawMode::DrawOne)),
+                saved.unwrap_or_else(|| GameState::new(seed_from_system_time(), DrawStockConfig::DrawOne)),
                 None,
             )
         };
@@ -388,7 +388,7 @@ fn poll_pending_new_game_seed(
 
 /// Pure helper extracted for testability — `new_game_with_solver_*`
 /// engine tests in the same file exercise this path.
-pub(crate) fn choose_winnable_seed(initial_seed: u64, draw_mode: DrawMode) -> u64 {
+pub(crate) fn choose_winnable_seed(initial_seed: u64, draw_mode: DrawStockConfig) -> u64 {
     let mut seed = initial_seed;
     for _ in 0..SOLVER_DEAL_RETRY_CAP {
         match GameState::solve_fresh_deal(
@@ -830,8 +830,8 @@ fn handle_draw(
                 Vec::new()
             } else {
                 let draw_count = match game.0.draw_mode() {
-                    DrawMode::DrawOne => 1_usize,
-                    DrawMode::DrawThree => 3_usize,
+                    DrawStockConfig::DrawOne => 1_usize,
+                    DrawStockConfig::DrawThree => 3_usize,
                 };
                 let n = stock.len();
                 let take = n.min(draw_count);
@@ -1324,7 +1324,7 @@ mod tests {
         app.insert_resource(PendingRestoredGame(None));
         // Override the system-time seed with a known value.
         app.world_mut().resource_mut::<GameStateResource>().0 =
-            GameState::new(seed, DrawMode::DrawOne);
+            GameState::new(seed, DrawStockConfig::DrawOne);
         app
     }
 
@@ -1540,7 +1540,7 @@ mod tests {
         app.insert_resource(GameStatePath(Some(path.clone())));
         // Override the seed so we can verify it was written.
         app.world_mut().resource_mut::<GameStateResource>().0 =
-            GameState::new(7654, DrawMode::DrawOne);
+            GameState::new(7654, DrawStockConfig::DrawOne);
 
         app.world_mut().write_message(AppExit::Success);
         app.update();
@@ -1559,7 +1559,7 @@ mod tests {
 
         let path = tmp_gs_path("new_game_delete");
         // Pre-create a saved file.
-        save_game_state_to(&path, &GameState::new(1, DrawMode::DrawOne)).unwrap();
+        save_game_state_to(&path, &GameState::new(1, DrawStockConfig::DrawOne)).unwrap();
         assert!(path.exists());
 
         let mut app = test_app(1);
@@ -1693,7 +1693,7 @@ mod tests {
     fn has_legal_moves_returns_true_for_fresh_game() {
         // A fresh deal always has a non-empty stock (24 cards), so drawing
         // is always a legal move regardless of the initial face-up tableau cards.
-        let game = GameState::new(42, DrawMode::DrawOne);
+        let game = GameState::new(42, DrawStockConfig::DrawOne);
         assert!(
             has_legal_moves(&game),
             "fresh deal must contain at least one legal move"
@@ -1707,7 +1707,7 @@ mod tests {
         // immediately placed. The game is only stuck when both stock AND waste
         // are exhausted and no visible card can be moved.
         use solitaire_core::card::{Card, Deck, Rank, Suit};
-        let mut game = GameState::new(1, DrawMode::DrawOne);
+        let mut game = GameState::new(1, DrawStockConfig::DrawOne);
         for foundation in [
             Foundation::Foundation1,
             Foundation::Foundation2,
@@ -1743,7 +1743,7 @@ mod tests {
     #[test]
     fn has_legal_moves_returns_true_when_ace_can_go_to_foundation() {
         use solitaire_core::card::{Card, Deck, Rank, Suit};
-        let mut game = GameState::new(1, DrawMode::DrawOne);
+        let mut game = GameState::new(1, DrawStockConfig::DrawOne);
 
         // Empty stock and waste so draw is NOT available.
         game.set_test_stock_cards(Vec::new());
@@ -1787,7 +1787,7 @@ mod tests {
         // card of its column the previous code would return false (softlock)
         // even though the player can still move that run.
         use solitaire_core::card::{Card, Deck, Rank, Suit};
-        let mut game = GameState::new(1, DrawMode::DrawOne);
+        let mut game = GameState::new(1, DrawStockConfig::DrawOne);
 
         game.set_test_stock_cards(Vec::new());
         game.set_test_waste_cards(Vec::new());
@@ -2185,7 +2185,7 @@ mod tests {
         assert_eq!(loaded.seed, 7654, "seed must match the live game state");
         assert_eq!(
             loaded.draw_mode,
-            DrawMode::DrawOne,
+            DrawStockConfig::DrawOne,
             "draw_mode must be captured"
         );
         assert_eq!(
@@ -2326,7 +2326,7 @@ mod tests {
             "with solver toggle off, the requested seed must be honoured exactly"
         );
         // Cross-check: the dealt tableau must match GameState::new(999) byte-for-byte.
-        let expected = GameState::new(999, DrawMode::DrawOne);
+        let expected = GameState::new(999, DrawStockConfig::DrawOne);
         for tableau in [
             Tableau::Tableau1,
             Tableau::Tableau2,
@@ -2403,7 +2403,7 @@ mod tests {
         //
         // Seed 394 was previously Unwinnable under the old DFS; now it resolves
         // as Inconclusive, so the helper must accept it immediately.
-        let chosen = choose_winnable_seed(394, DrawMode::DrawOne);
+        let chosen = choose_winnable_seed(394, DrawStockConfig::DrawOne);
         assert_eq!(
             chosen, 394,
             "seed 394 resolves as Inconclusive; choose_winnable_seed must accept it as-is"