Initial commit: SejeteralO water tarification platform

Full-stack app for participatory water pricing using Bezier curves.
- Backend: FastAPI + SQLAlchemy + SQLite with JWT auth
- Frontend: Nuxt 4 + TypeScript with interactive SVG editor
- Math engine: cubic Bezier tarification with Cardano solver
- Admin: commune management, household import, vote monitoring, CMS
- Citizen: interactive curve editor, vote submission
- Docker-compose deployment ready

Includes fixes for:
- Impact table snake_case/camelCase property mismatch
- CMS content backend API + frontend editor (was stub)
- Admin route protection middleware
- Public content display on commune page
- Vote confirmation page link fix

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/main.py

@@ -0,0 +1,42 @@
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.config import settings
+from app.database import init_db
+from app.routers import auth, communes, content, tariff, votes, households
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    await init_db()
+    yield
+
+
+app = FastAPI(
+    title=settings.APP_NAME,
+    description="Outil de démocratie participative pour la tarification de l'eau",
+    version="0.1.0",
+    lifespan=lifespan,
+)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=settings.CORS_ORIGINS,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(auth.router, prefix="/api/v1/auth", tags=["auth"])
+app.include_router(communes.router, prefix="/api/v1/communes", tags=["communes"])
+app.include_router(tariff.router, prefix="/api/v1/tariff", tags=["tariff"])
+app.include_router(votes.router, prefix="/api/v1", tags=["votes"])
+app.include_router(households.router, prefix="/api/v1", tags=["households"])
+app.include_router(content.router, prefix="/api/v1/communes", tags=["content"])
+
+
+@app.get("/api/health")
+async def health():
+    return {"status": "ok"}