Initial commit: Claude Code Project Tracker

Add comprehensive development intelligence system that tracks:
- Development sessions with automatic start/stop
- Full conversation history with semantic search
- Tool usage and file operation analytics
- Think time and engagement analysis
- Git activity correlation
- Learning pattern recognition
- Productivity insights and metrics

Features:
- FastAPI backend with SQLite database
- Modern web dashboard with interactive charts
- Claude Code hook integration for automatic tracking
- Comprehensive test suite with 100+ tests
- Complete API documentation (OpenAPI/Swagger)
- Privacy-first design with local data storage

🤖 Generated with [Claude Code](https://claude.ai/code)

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

app/models/base.py

@@ -0,0 +1,32 @@
+"""
+Base model configuration for SQLAlchemy models.
+"""
+
+from datetime import datetime
+from typing import Any
+from sqlalchemy import DateTime
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+from sqlalchemy.sql import func
+
+
+class Base(DeclarativeBase):
+    """Base class for all database models."""
+    pass
+
+
+class TimestampMixin:
+    """Mixin to add created_at and updated_at timestamps to models."""
+    
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        nullable=False
+    )
+    
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        onupdate=func.now(),
+        nullable=False
+    )