Initial release v1.1.0

- Complete MVP for tracking Fidelity brokerage account performance
- Transaction import from CSV with deduplication
- Automatic FIFO position tracking with options support
- Real-time P&L calculations with market data caching
- Dashboard with timeframe filtering (30/90/180 days, 1 year, YTD, all time)
- Docker-based deployment with PostgreSQL backend
- React/TypeScript frontend with TailwindCSS
- FastAPI backend with SQLAlchemy ORM

Features:
- Multi-account support
- Import via CSV upload or filesystem
- Open and closed position tracking
- Balance history charting
- Performance analytics and metrics
- Top trades analysis
- Responsive UI design

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend/app/utils/deduplication.py

@@ -0,0 +1,65 @@
+"""Transaction deduplication utilities."""
+import hashlib
+from datetime import date
+from decimal import Decimal
+from typing import Optional
+
+
+def generate_transaction_hash(
+    account_id: int,
+    run_date: date,
+    symbol: Optional[str],
+    action: str,
+    amount: Optional[Decimal],
+    quantity: Optional[Decimal],
+    price: Optional[Decimal],
+) -> str:
+    """
+    Generate a unique SHA-256 hash for a transaction to prevent duplicates.
+
+    The hash is generated from key transaction attributes that uniquely identify
+    a transaction: account, date, symbol, action, amount, quantity, and price.
+
+    Args:
+        account_id: Account identifier
+        run_date: Transaction date
+        symbol: Trading symbol
+        action: Transaction action description
+        amount: Transaction amount
+        quantity: Number of shares/contracts
+        price: Price per unit
+
+    Returns:
+        str: 64-character hexadecimal SHA-256 hash
+
+    Example:
+        >>> generate_transaction_hash(
+        ...     account_id=1,
+        ...     run_date=date(2025, 12, 26),
+        ...     symbol="AAPL",
+        ...     action="YOU BOUGHT",
+        ...     amount=Decimal("-1500.00"),
+        ...     quantity=Decimal("10"),
+        ...     price=Decimal("150.00")
+        ... )
+        'a1b2c3d4...'
+    """
+    # Convert values to strings, handling None values
+    symbol_str = symbol or ""
+    amount_str = str(amount) if amount is not None else ""
+    quantity_str = str(quantity) if quantity is not None else ""
+    price_str = str(price) if price is not None else ""
+
+    # Create hash string with pipe delimiter
+    hash_string = (
+        f"{account_id}|"
+        f"{run_date.isoformat()}|"
+        f"{symbol_str}|"
+        f"{action}|"
+        f"{amount_str}|"
+        f"{quantity_str}|"
+        f"{price_str}"
+    )
+
+    # Generate SHA-256 hash
+    return hashlib.sha256(hash_string.encode("utf-8")).hexdigest()