Rebuild position history from Binance fills

Sync account fills into a new trading_fills table every 60s and
reconstruct closed positions from them, so positions opened outside
the program are included and external closes get an exit price.
Positions link to plans by order id. The history drawer gains symbol,
close-date, outcome and source filters, a summary bar and pagination.

backend/alembic/versions/20261016_f2a6c8d91b47_trading_fills.py

@@ -0,0 +1,43 @@
+"""trading fills
+
+Revision ID: f2a6c8d91b47
+Revises: e8b25c71d4a9
+Create Date: 2026-10-16 12:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'f2a6c8d91b47'
+down_revision: Union[str, Sequence[str], None] = 'e8b25c71d4a9'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # 历史仓位要包含手动成交，改由币安成交记录还原（2026-10-16）
+    op.create_table('trading_fills',
+    sa.Column('symbol', sa.String(length=32), nullable=False),
+    sa.Column('trade_id', sa.BigInteger(), nullable=False),
+    sa.Column('order_id', sa.BigInteger(), nullable=False),
+    sa.Column('side', sa.String(length=4), nullable=False),
+    sa.Column('price', sa.Numeric(), nullable=False),
+    sa.Column('qty', sa.Numeric(), nullable=False),
+    sa.Column('realized_pnl', sa.Numeric(), nullable=False),
+    sa.Column('commission', sa.Numeric(), nullable=False),
+    sa.Column('commission_asset', sa.String(length=16), nullable=False),
+    sa.Column('time', sa.DateTime(timezone=True), nullable=False),
+    sa.PrimaryKeyConstraint('symbol', 'trade_id')
+    )
+    op.create_index('ix_trading_fills_symbol_time', 'trading_fills', ['symbol', 'time'], unique=False)
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    op.drop_index('ix_trading_fills_symbol_time', table_name='trading_fills')
+    op.drop_table('trading_fills')