style: cargo fmt under rustfmt 1.9 and gate formatting in CI

The repo was formatted under an older stable; rustfmt 1.9 (Rust 1.95)
wraps signatures and call sites differently, so every touched file was
picking up unrelated formatting hunks. One mechanical pass, and a
'cargo fmt --check' step in the test workflow (same pinned 1.95.0
toolchain) so drift can't accumulate again.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

solitaire_engine/src/hud_plugin/tests.rs

@@ -40,9 +40,16 @@ fn read_hud_text<M: Component>(app: &mut App) -> String {
 #[test]
 fn score_reflects_game_state() {
     let mut app = headless_app();
-    let score = app.world_mut().resource_mut::<GameStateResource>().0.force_test_score(20);
+    let score = app
+        .world_mut()
+        .resource_mut::<GameStateResource>()
+        .0
+        .force_test_score(20);
     app.update();
-    assert_eq!(read_hud_text::<HudScore>(&mut app), format!("Score: {score}"));
+    assert_eq!(
+        read_hud_text::<HudScore>(&mut app),
+        format!("Score: {score}")
+    );
 }
 
 #[test]
@@ -192,7 +199,9 @@ fn challenge_time_color_zero_is_danger() {
 fn challenge_hud_empty_when_no_daily_resource() {
     // No DailyChallengeResource inserted → HudChallenge must be empty.
     let mut app = headless_app();
-    app.world_mut().resource_mut::<GameStateResource>().set_changed();
+    app.world_mut()
+        .resource_mut::<GameStateResource>()
+        .set_changed();
     app.update();
     assert_eq!(read_hud_text::<HudChallenge>(&mut app), "");
 }
@@ -207,7 +216,9 @@ fn challenge_hud_shows_time_limit_when_resource_present() {
         target_score: None,
         max_time_secs: Some(300),
     });
-    app.world_mut().resource_mut::<GameStateResource>().set_changed();
+    app.world_mut()
+        .resource_mut::<GameStateResource>()
+        .set_changed();
     app.update();
     assert_eq!(read_hud_text::<HudChallenge>(&mut app), "Limit: 5:00");
 }
@@ -222,7 +233,9 @@ fn challenge_hud_shows_score_goal_when_resource_present() {
         target_score: Some(4000),
         max_time_secs: None,
     });
-    app.world_mut().resource_mut::<GameStateResource>().set_changed();
+    app.world_mut()
+        .resource_mut::<GameStateResource>()
+        .set_changed();
     app.update();
     assert_eq!(read_hud_text::<HudChallenge>(&mut app), "Goal: 4000 pts");
 }
@@ -238,7 +251,10 @@ fn challenge_hud_clears_on_win() {
         max_time_secs: Some(300),
     });
     // Mark the game as won — HudChallenge should be empty.
-    app.world_mut().resource_mut::<GameStateResource>().0.set_test_won(true);
+    app.world_mut()
+        .resource_mut::<GameStateResource>()
+        .0
+        .set_test_won(true);
     app.update();
     assert_eq!(read_hud_text::<HudChallenge>(&mut app), "");
 }
@@ -384,7 +400,10 @@ fn score_increase_above_threshold_spawns_floater_in_accent_primary() {
     set_manual_time_step(&mut app, 0.0);
     // Initial state has score=0; bumping by 50 (the threshold)
     // is the smallest jump that triggers the floater.
-    app.world_mut().resource_mut::<GameStateResource>().0.force_test_score(50);
+    app.world_mut()
+        .resource_mut::<GameStateResource>()
+        .0
+        .force_test_score(50);
     app.update();
 
     // One floater should now exist.
@@ -405,7 +424,10 @@ fn score_increase_above_threshold_spawns_floater_in_accent_primary() {
 #[test]
 fn score_floater_despawns_after_full_lifetime() {
     let mut app = headless_app();
-    app.world_mut().resource_mut::<GameStateResource>().0.force_test_score(50);
+    app.world_mut()
+        .resource_mut::<GameStateResource>()
+        .0
+        .force_test_score(50);
     app.update();
     assert_eq!(count_with::<ScoreFloater>(&mut app), 1);
 
@@ -431,7 +453,10 @@ fn score_increase_below_threshold_does_not_spawn_floater() {
     let mut app = headless_app();
     // +5 mirrors a single tableau-to-foundation move; well below
     // the 50-point threshold so the floater path stays dormant.
-    app.world_mut().resource_mut::<GameStateResource>().0.force_test_score(5);
+    app.world_mut()
+        .resource_mut::<GameStateResource>()
+        .0
+        .force_test_score(5);
     app.update();
     assert_eq!(
         count_with::<ScoreFloater>(&mut app),
@@ -507,7 +532,10 @@ fn score_change_skips_pulse_and_floater_under_reduce_motion() {
         ..Settings::default()
     }));
     // +100 would normally create both a ScorePulse and a ScoreFloater.
-    app.world_mut().resource_mut::<GameStateResource>().0.force_test_score(50);
+    app.world_mut()
+        .resource_mut::<GameStateResource>()
+        .0
+        .force_test_score(50);
     app.update();
     assert_eq!(
         count_with::<ScorePulse>(&mut app),