feat: setup FastAPI main app with routers and test fixtures

- Main FastAPI app with all routers included
- CORS middleware for frontend
- Test fixtures with in-memory SQLite database
- Placeholder routers for future tasks

backend/app/main.py

@@ -1,7 +1,8 @@
 from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
 from contextlib import asynccontextmanager
 from app.database import engine, Base
-from app.routers import sources, jobs
+from app.routers import sources, jobs, executions, backups, settings, dashboard
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
@@ -9,7 +10,27 @@ async def lifespan(app: FastAPI):
         await conn.run_sync(Base.metadata.create_all)
     yield
 
-app = FastAPI(title="Backup Tool API", lifespan=lifespan)
+app = FastAPI(
+    title="Backup Tool API",
+    version="0.1.0",
+    lifespan=lifespan
+)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["http://localhost:3000"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
 
 app.include_router(sources.router)
 app.include_router(jobs.router)
+app.include_router(executions.router)
+app.include_router(backups.router)
+app.include_router(settings.router)
+app.include_router(dashboard.router)
+
+@app.get("/api/health")
+async def health_check():
+    return {"status": "healthy"}

backend/app/routers/backups.py

@@ -0,0 +1,4 @@
+from fastapi import APIRouter
+
+router = APIRouter(prefix="/api/backups", tags=["backups"])
+# Will be implemented in later tasks

backend/app/routers/dashboard.py

@@ -0,0 +1,4 @@
+from fastapi import APIRouter
+
+router = APIRouter(prefix="/api/dashboard", tags=["dashboard"])
+# Will be implemented in later tasks

backend/app/routers/executions.py

@@ -0,0 +1,4 @@
+from fastapi import APIRouter
+
+router = APIRouter(prefix="/api/executions", tags=["executions"])
+# Will be implemented in later tasks

backend/app/routers/settings.py

@@ -0,0 +1,4 @@
+from fastapi import APIRouter
+
+router = APIRouter(prefix="/api/settings", tags=["settings"])
+# Will be implemented in later tasks

backend/tests/conftest.py

@@ -0,0 +1,32 @@
+import pytest
+import pytest_asyncio
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
+from app.database import Base, get_db
+from app.main import app
+from httpx import AsyncClient
+
+TEST_DATABASE_URL = "sqlite+aiosqlite:///./test.db"
+
+@pytest_asyncio.fixture
+async def db():
+    engine = create_async_engine(TEST_DATABASE_URL, echo=False)
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+    
+    async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+    async with async_session() as session:
+        yield session
+    
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.drop_all)
+    await engine.dispose()
+
+@pytest_asyncio.fixture
+async def client(db):
+    async def override_get_db():
+        yield db
+    
+    app.dependency_overrides[get_db] = override_get_db
+    async with AsyncClient(app=app, base_url="http://test") as ac:
+        yield ac
+    app.dependency_overrides.clear()