feat: enforce FA lock deadline — block signing FA players after week 14

The fa_lock_week config existed but was never enforced. Now /dropadd blocks
adding players FROM Free Agency when current_week >= fa_lock_week (14).
Dropping players TO FA remains allowed after the deadline.

Also consolidates two league_service.get_current_state() calls into one
shared fetch at the top of add_move() to eliminate a redundant API round-trip.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

services/transaction_builder.py

@@ -277,6 +277,35 @@ class TransactionBuilder:
         Returns:
             Tuple of (success: bool, error_message: str). If success is True, error_message is empty.
         """
+        # Fetch current state once if needed by FA lock or pending-transaction check
+        is_fa_pickup = (
+            move.from_roster == RosterType.FREE_AGENCY
+            and move.to_roster != RosterType.FREE_AGENCY
+        )
+        needs_current_state = is_fa_pickup or (
+            check_pending_transactions and next_week is None
+        )
+
+        current_week: Optional[int] = None
+        if needs_current_state:
+            try:
+                current_state = await league_service.get_current_state()
+                current_week = current_state.week if current_state else 1
+            except Exception as e:
+                logger.warning(f"Could not get current week: {e}")
+                current_week = 1
+
+        # Block adding players FROM Free Agency after the FA lock deadline
+        if is_fa_pickup and current_week is not None:
+            config = get_config()
+            if current_week >= config.fa_lock_week:
+                error_msg = (
+                    f"Free agency is closed (week {current_week}, deadline was week {config.fa_lock_week}). "
+                    f"Cannot add {move.player.name} from FA."
+                )
+                logger.warning(error_msg)
+                return False, error_msg
+
         # Check if player is already in a move in this transaction builder
         existing_move = self.get_move_for_player(move.player.id)
         if existing_move:
@@ -299,23 +328,15 @@ class TransactionBuilder:
             return False, error_msg
 
         # Check if player is already in another team's pending transaction for next week
-        # This prevents duplicate claims that would need to be resolved at freeze time
-        # Only applies to /dropadd (scheduled moves), not /ilmove (immediate moves)
         if check_pending_transactions:
             if next_week is None:
-                try:
+                next_week = (current_week + 1) if current_week else 1
-                    current_state = await league_service.get_current_state()
-                    next_week = (current_state.week + 1) if current_state else 1
-                except Exception as e:
-                    logger.warning(
-                        f"Could not get current week for pending transaction check: {e}"
-                    )
-                    next_week = 1
 
-            is_pending, claiming_team = (
+            (
-                await transaction_service.is_player_in_pending_transaction(
+                is_pending,
-                    player_id=move.player.id, week=next_week, season=self.season
+                claiming_team,
-                )
+            ) = await transaction_service.is_player_in_pending_transaction(
+                player_id=move.player.id, week=next_week, season=self.season
             )
 
             if is_pending:

tests/test_services_transaction_builder.py

@@ -115,6 +115,13 @@ class TestTransactionBuilder:
         svc.get_current_roster.return_value = mock_roster
         return svc
 
+    @pytest.fixture(autouse=True)
+    def mock_league_service(self):
+        """Patch league_service for all tests so FA lock check uses week 10 (before deadline)."""
+        with patch("services.transaction_builder.league_service") as mock_ls:
+            mock_ls.get_current_state = AsyncMock(return_value=MagicMock(week=10))
+            yield mock_ls
+
     @pytest.fixture
     def builder(self, mock_team, mock_roster_service):
         """Create a TransactionBuilder for testing with injected roster service."""
@@ -152,6 +159,50 @@ class TestTransactionBuilder:
         assert builder.is_empty is False
         assert move in builder.moves
 
+    @pytest.mark.asyncio
+    async def test_add_move_from_fa_blocked_after_deadline(self, builder, mock_player):
+        """Test that adding a player FROM Free Agency is blocked after fa_lock_week."""
+        move = TransactionMove(
+            player=mock_player,
+            from_roster=RosterType.FREE_AGENCY,
+            to_roster=RosterType.MAJOR_LEAGUE,
+            to_team=builder.team,
+        )
+
+        with patch(
+            "services.transaction_builder.league_service"
+        ) as mock_league_service:
+            mock_league_service.get_current_state = AsyncMock(
+                return_value=MagicMock(week=15)
+            )
+
+            success, error_message = await builder.add_move(
+                move, check_pending_transactions=False
+            )
+
+        assert success is False
+        assert "Free agency is closed" in error_message
+        assert builder.move_count == 0
+
+    @pytest.mark.asyncio
+    async def test_drop_to_fa_allowed_after_deadline(self, builder, mock_player):
+        """Test that dropping a player TO Free Agency is still allowed after fa_lock_week."""
+        move = TransactionMove(
+            player=mock_player,
+            from_roster=RosterType.MAJOR_LEAGUE,
+            to_roster=RosterType.FREE_AGENCY,
+            from_team=builder.team,
+        )
+
+        # Drop to FA doesn't trigger the FA lock check (autouse fixture provides week 10)
+        success, error_message = await builder.add_move(
+            move, check_pending_transactions=False
+        )
+
+        assert success is True
+        assert error_message == ""
+        assert builder.move_count == 1
+
     @pytest.mark.asyncio
     async def test_add_duplicate_move_fails(self, builder, mock_player):
         """Test that adding duplicate moves for same player fails."""
@@ -809,6 +860,13 @@ class TestPendingTransactionValidation:
         """Create a mock player for testing."""
         return Player(id=12472, name="Test Player", wara=2.5, season=12, pos_1="OF")
 
+    @pytest.fixture(autouse=True)
+    def mock_league_service(self):
+        """Patch league_service so FA lock check and week resolution use week 10."""
+        with patch("services.transaction_builder.league_service") as mock_ls:
+            mock_ls.get_current_state = AsyncMock(return_value=MagicMock(week=10))
+            yield mock_ls
+
     @pytest.fixture
     def builder(self, mock_team):
         """Create a TransactionBuilder for testing."""