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main.py

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+"""
+Evolution Todo API - FastAPI Backend
+
+Task: 1.6
+Spec: specs/overview.md
+"""
+from dotenv import load_dotenv
+load_dotenv()  # Load .env file first
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from db import create_db_and_tables
+import os
+
+# Initialize FastAPI app
+app = FastAPI(
+    title="Evolution Todo API",
+    version="1.0.0",
+    description="RESTful API for Evolution Todo application"
+)
+
+# CORS Configuration
+CORS_ORIGINS = os.getenv("CORS_ORIGINS", "http://localhost:3000").split(",")
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=CORS_ORIGINS,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+@app.on_event("startup")
+def on_startup():
+    """Initialize database tables on startup."""
+    create_db_and_tables()
+
+
+@app.get("/")
+def root():
+    """Root endpoint - API status check."""
+    return {
+        "message": "Evolution Todo API",
+        "status": "running",
+        "version": "1.0.0"
+    }
+
+
+# Import and include routers
+from routes.tasks import router as tasks_router
+from routes.auth import router as auth_router
+
+app.include_router(tasks_router)
+app.include_router(auth_router)