fix(game): restore the original plunger launch

Start each ball at the recovered right-lane coordinates and charge the
plunger while Down is held, firing only on release. Render all eleven frames
of resource 901, preserve object 25 as the returning-ball catch, and use the
object table's center-contact extents without adding the art radius twice.

Test Plan:
- cargo fmt --all -- --check
- cargo test
- cargo clippy --all-targets --all-features -- -D warnings
- runtime smoke: start, hold Down, release, and inspect the right shooter lane

tdkpin-rs/src/app.rs

@@ -136,14 +136,9 @@ impl App {
             self.assets.play(2012, self.saved.settings.sounds);
         }
         if is_key_pressed(KeyCode::Down) || is_key_pressed(KeyCode::Enter) {
-            let mut game = Game::new(self.player_count);
-            let launched = game.launch();
-            self.game = Some(game);
+            self.game = Some(Game::new(self.player_count));
             self.screen = Screen::Playing;
             self.assets.play(2008, self.saved.settings.sounds);
-            if launched {
-                self.assets.play(2016, self.saved.settings.sounds);
-            }
         }
     }
 
@@ -175,7 +170,7 @@ impl App {
         let controls = Controls {
             left_flipper,
             right_flipper,
-            launch_pressed: is_key_pressed(KeyCode::Down),
+            launch_down: is_key_down(KeyCode::Down),
             nudge,
         };
         let events = self.game.as_mut().map_or_else(Vec::new, |game| {
@@ -486,15 +481,18 @@ impl App {
                     YELLOW,
                 );
             }
-            let frame = animation_frame(get_time(), 18.0, 10);
+        }
+        if game.ball.in_launcher {
+            let frame = [0.05, 0.15, 0.25, 0.35, 0.45, 0.55, 0.65, 0.75, 0.85, 0.95]
+                .partition_point(|threshold| game.launcher_charge >= *threshold);
             draw_texture_ex(
-                &self.assets.magnet,
-                306.0,
-                411.0,
+                &self.assets.plunger,
+                314.0,
+                406.0,
                 WHITE,
                 DrawTextureParams {
-                    dest_size: Some(vec2(23.0, 17.0)),
-                    source: Some(Rect::new(frame as f32 * 23.0, 0.0, 23.0, 17.0)),
+                    dest_size: Some(vec2(21.0, 18.0)),
+                    source: Some(Rect::new(frame as f32 * 21.0, 0.0, 20.0, 17.0)),
                     ..Default::default()
                 },
             );