fix: preserve batter at plate when half-inning ends on caught stealing

When a half-inning ended with a CS (or pickoff), the batter who was at
the plate was incorrectly skipped in the next inning. The side-switch
code unconditionally advanced the batting order by 1 without checking
whether the last play was a plate appearance. Now checks opponent_play.pa
before incrementing, matching the existing non-side-switch logic.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-1.8.4
+1.9.1

command_logic/logic_gameplay.py

@@ -753,7 +753,7 @@ def complete_play(session: Session, this_play: Play):
             opponent_play = get_last_team_play(
                 session, this_play.game, this_play.pitcher.team
             )
-            nbo = opponent_play.batting_order + 1
+            nbo = opponent_play.batting_order + 1 if opponent_play.pa == 1 else opponent_play.batting_order
         except PlayNotFoundException as e:
             logger.info(
                 f"logic_gameplay - complete_play - No last play found for {this_play.pitcher.team.sname}, setting upcoming batting order to 1"

tests/command_logic/test_logic_gameplay.py

@@ -569,3 +569,95 @@ def test_pinch_runner_entry_and_scoring(session: Session):
 
     # Entry play should NOT be in this list (PA=0)
     assert entry_play not in pitcher_plays
+
+
+async def test_cs_end_of_inning_preserves_batter(session: Session):
+    """
+    Test that when a half-inning ends on a Caught Stealing, the batter who was
+    at the plate (but did not complete a plate appearance) leads off the next
+    time their team bats.
+
+    Scenario:
+      Top 1 - Away team batting:
+        Batter 1 (bo=1): strikeout → 1 out
+        Batter 2 (bo=2): strikeout → 2 outs
+        Batter 3 (bo=3): single, reaches first
+        Batter 4 (bo=4): at the plate, runner caught stealing → 3 outs, side switch
+
+      Bot 1 - Home team batting:
+        Batter 1 (bo=1): strikeout → 1 out
+        Batter 2 (bo=2): strikeout → 2 outs
+        Batter 3 (bo=3): strikeout → 3 outs, side switch
+
+      Top 2 - Away team batting:
+        The next batter should be Batter 4 (bo=4), NOT Batter 5 (bo=5),
+        because Batter 4 never completed a plate appearance.
+    """
+    this_game = session.get(Game, 3)
+    play = this_game.initialize_play(session)
+
+    # --- TOP 1 ---
+
+    # Batter 1 (bo=1): strikeout → 1 out
+    assert play.batting_order == 1
+    assert play.inning_half == 'top'
+    play = await strikeouts(session, None, play)
+    play = complete_play(session, play)
+
+    # Batter 2 (bo=2): strikeout → 2 outs
+    assert play.batting_order == 2
+    assert play.starting_outs == 1
+    play = await strikeouts(session, None, play)
+    play = complete_play(session, play)
+
+    # Batter 3 (bo=3): single → runner on first
+    assert play.batting_order == 3
+    assert play.starting_outs == 2
+    play = await singles(session, None, play, '*')
+    play = complete_play(session, play)
+
+    # Batter 4 (bo=4) is at the plate with runner on first
+    assert play.batting_order == 4
+    assert play.starting_outs == 2
+    assert play.on_first is not None
+    assert play.inning_half == 'top'
+
+    # Runner on first is caught stealing → 3rd out, side switch
+    play = await steals(session, None, play, 'caught-stealing', to_base=2)
+    assert play.pa == 0  # CS is not a plate appearance
+    assert play.outs == 1  # CS records one out
+    play = complete_play(session, play)
+
+    # Should now be bottom of inning 1
+    assert play.inning_half == 'bot'
+    assert play.inning_num == 1
+    assert play.is_new_inning is True
+
+    # --- BOT 1 ---
+
+    # Home batter 1 (bo=1): strikeout → 1 out
+    assert play.batting_order == 1
+    play = await strikeouts(session, None, play)
+    play = complete_play(session, play)
+
+    # Home batter 2 (bo=2): strikeout → 2 outs
+    assert play.batting_order == 2
+    play = await strikeouts(session, None, play)
+    play = complete_play(session, play)
+
+    # Home batter 3 (bo=3): strikeout → 3 outs, side switch
+    assert play.batting_order == 3
+    play = await strikeouts(session, None, play)
+    play = complete_play(session, play)
+
+    # --- TOP 2 ---
+
+    # Should be top of inning 2, and batter 4 (bo=4) should lead off
+    # because they never completed a PA in the previous half-inning
+    assert play.inning_half == 'top'
+    assert play.inning_num == 2
+    assert play.is_new_inning is True
+    assert play.batting_order == 4, (
+        f"Expected batter 4 to lead off (never completed PA), "
+        f"but got batter {play.batting_order}"
+    )