fix(multiball): match capture collapse timing

Capture removal and ordinary drains do not clear the original game's shared
multiball flag at the same point. The clone treated both transitions alike,
which could end double scoring before ball two's remaining slot pass or leave
it active after ball two entered a capture hole. It also failed to pause the
returning claw until collapse and to clear the flag on a fifth lock.

Collapse capture-driven multiball state at the next timer callback, retain the
immediate drain behavior, and end the mode explicitly when all five lock
contacts complete. Calculate lock awards from the live contact words so a
second ball still settling in another hole is counted. Stage effect-seven slot
creation until the primary substep batch returns, matching the timer's spawn
request ordering.

The original leaves a multiball capture contact as value 2, so a later single
ball may enter that same wheel slot once more and convert it to the permanent
99 sentinel. This possibly unintended original-game quirk remains for binary
parity.

Test Plan:
- `just test` -- passed (141 game tests and 8 service tests)
- `just clippy` -- passed
- `just build-production` -- passed
- `cargo +nightly fmt --all -- --check` -- passed
- `rumdl check --flavor commonmark CHANGELOG.md` -- passed
- `git diff --cached --check` -- passed

tdkpin-rs/CHANGELOG.md

@@ -8,6 +8,20 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Fixed
+
+- Match capture-driven multiball collapse timing so the surviving slot keeps
+  double scoring through the current callback, then returns to normal scoring
+  on the next callback and the returning claw remains paused until that
+  collapse; completing the fifth wheel lock still ends multiball scoring
+  immediately.
+- Derive wheel-lock awards from the original live contact words so two balls
+  settling into different slots at once receive the same accumulated award as
+  the original game.
+- Stage an effect-seven reserve-ball request until ball 1's full substep batch
+  has returned, preventing the new slot from participating in collision and
+  capture rules before the original creates it.
+
 ## [1.1.0] - 2026-08-29
 
 ### Added

tdkpin-rs/src/game.rs

@@ -592,19 +592,31 @@ impl Game {
             self.update_target_rotation(events);
         }
         let panel_active = self.update_panel_completion(events);
+        // The original collapses an inactive two-ball slot immediately before
+        // the next physics pass. Capture removal does not clear multiball
+        // scoring until that collapse, so the surviving slot retains double
+        // scoring for the remainder of the callback in which it was captured.
+        if self.secondary_ball.is_none() && self.score_mode == ScoreMode::Multiball {
+            self.score_mode = ScoreMode::Normal;
+        }
         if !self.claw.ball_suspended && !panel_active {
             let had_secondary_ball = self.secondary_ball.is_some();
+            let mut spawned_secondary = None;
             if had_secondary_ball {
                 self.score_mode = ScoreMode::Multiball;
             }
             for _ in 0..substeps {
-                if self.fixed_update(events) || self.finished || self.claw.ball_suspended {
+                let stop = self.fixed_update(events);
+                // Effect seven publishes its spawn request during record 149,
+                // but the original timer does not create slot two until the
+                // complete slot-one simulation pass has returned.
+                if !had_secondary_ball && spawned_secondary.is_none() {
+                    spawned_secondary = self.secondary_ball.take();
+                }
+                if stop || self.finished || self.claw.ball_suspended {
                     break;
                 }
             }
-            if had_secondary_ball && self.secondary_ball.is_none() {
-                self.score_mode = ScoreMode::Normal;
-            }
             if had_secondary_ball && !self.finished && !self.claw.ball_suspended {
                 if self.secondary_ball.is_some() {
                     for _ in 0..substeps {
@@ -626,6 +638,10 @@ impl Game {
                     }
                 }
             }
+            if let Some(spawned) = spawned_secondary {
+                debug_assert!(self.secondary_ball.is_none());
+                self.secondary_ball = Some(spawned);
+            }
         }
 
         self.pending_flipper_edges[0] =
@@ -1731,7 +1747,12 @@ impl Game {
         events: &mut Vec<Event>,
     ) -> BallAction {
         self.wheel_holes[index] = true;
-        let filled = self.wheel_holes.iter().filter(|filled| **filled).count();
+        // 1000:967a derives the award from all live type-three contact words,
+        // including another ball that is still settling into a lock hole.
+        let filled = self.record_contacts[129..=133]
+            .iter()
+            .filter(|contact| **contact != 0)
+            .count();
         let shift = u32::try_from(filled.min(5)).unwrap_or(5);
         let award = 5_000_u32 << shift;
         let player = &mut self.players[self.current_player];
@@ -1746,6 +1767,7 @@ impl Game {
             if ball_count == 1 {
                 self.panel_frame = Some(0);
             }
+            self.score_mode = ScoreMode::Normal;
         }
         events.push(Event::Lock);
         if ball_count == 1 {
@@ -2088,7 +2110,7 @@ impl Game {
     }
 
     fn update_claw(&mut self, dt: f32, events: &mut Vec<Event>) {
-        if !self.claw.active {
+        if !self.claw.active || self.score_mode == ScoreMode::Multiball {
             return;
         }
         self.claw.frame_accumulator += dt;
@@ -3420,15 +3442,71 @@ mod tests {
             spin: Real48::ZERO,
             capture_age: 300,
         });
+        game.score_mode = ScoreMode::Multiball;
         let mut events = Vec::new();
 
         game.advance_secondary_ball(&mut events);
 
         assert!(game.secondary_ball.is_none());
+        assert_eq!(game.score_mode, ScoreMode::Multiball);
         assert_eq!(game.ball.capture_age, 17);
         assert_eq!(game.record_contacts[usize::from(sensor.id)], 2);
         assert!(game.wheel_holes[0]);
         assert!(events.contains(&Event::Lock));
+
+        game.timer_tick(0.0, 0, &mut events);
+        assert_eq!(game.score_mode, ScoreMode::Normal);
+    }
+
+    #[test]
+    fn captured_ball_one_keeps_multiball_scoring_for_ball_two_slot_pass() {
+        let sensor = LOCK_HOLES[0];
+        let mut game = Game::new_with_seed(1, 7);
+        game.ball.in_launcher = false;
+        game.ball.position = sensor.center;
+        game.ball.velocity = Vec2::ZERO;
+        game.ball.capture_age = 300;
+        game.record_contacts[usize::from(sensor.id)] = 1;
+        game.secondary_ball = Some(Ball {
+            position: EFFECT_SENSOR.center,
+            velocity: Vec2::ZERO,
+            in_launcher: false,
+            spin: Real48::ZERO,
+            capture_age: 0,
+        });
+        game.target_effect = 1;
+        game.object_active[usize::from(EFFECT_SENSOR.id)] = true;
+        game.score_mode = ScoreMode::Multiball;
+        let mut events = Vec::new();
+
+        game.timer_tick(0.01, 1, &mut events);
+
+        assert!(game.secondary_ball.is_none());
+        assert_eq!(game.player().score, 1_000);
+        assert_eq!(game.player().secondary_score, 20_000);
+        assert_eq!(game.score_mode, ScoreMode::Multiball);
+
+        game.timer_tick(0.0, 0, &mut events);
+        assert_eq!(game.score_mode, ScoreMode::Normal);
+    }
+
+    #[test]
+    fn active_multiball_pauses_the_returning_claw_until_slot_collapse() {
+        let mut game = Game::new(1);
+        game.claw.active = true;
+        game.claw.frame = 1;
+        game.claw.target_frame = 10;
+        game.claw.bank = ClawSpriteBank::Opening;
+        game.claw.frame_accumulator = 0.0;
+        game.score_mode = ScoreMode::Multiball;
+        let mut events = Vec::new();
+
+        game.update_claw(CLAW_FRAME_SECONDS, &mut events);
+        assert_eq!(game.claw.frame, 1);
+
+        game.score_mode = ScoreMode::Normal;
+        game.update_claw(CLAW_FRAME_SECONDS, &mut events);
+        assert_eq!(game.claw.frame, 2);
     }
 
     #[test]
@@ -4529,6 +4607,23 @@ mod tests {
         );
     }
 
+    #[test]
+    fn wheel_award_counts_another_ball_settling_in_a_different_hole() {
+        let mut game = Game::new(1);
+        game.record_contacts[129] = 1;
+        game.record_contacts[130] = 2;
+        let mut events = Vec::new();
+
+        assert_eq!(
+            game.complete_lock_hole(1, 2, &mut events),
+            BallAction::Remove
+        );
+
+        assert_eq!(game.player().secondary_score, 20_000);
+        assert!(!game.wheel_holes[0]);
+        assert!(game.wheel_holes[1]);
+    }
+
     #[test]
     fn fifth_multiball_lock_defers_panel_and_caps_survivor_reaward() {
         let mut game = Game::new(1);
@@ -4546,6 +4641,7 @@ mod tests {
         assert_eq!(game.player().secondary_score, 0);
         assert_eq!(game.player().score_multiplier, 2);
         assert_eq!(game.panel_frame, None);
+        assert_eq!(game.score_mode, ScoreMode::Normal);
 
         let mut reset_by_special_hole = game.clone();
         reset_by_special_hole.reset_ball_to_launcher();