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>

frontend/app/pages/commune/[slug]/vote.vue

@@ -0,0 +1,24 @@
+<template>
+  <div style="max-width: 600px; margin: 2rem auto; text-align: center;">
+    <div class="card">
+      <h2 style="margin-bottom: 1rem;">Vote enregistré</h2>
+      <p style="margin-bottom: 1.5rem;">
+        Votre vote a été soumis avec succès. Vous pouvez revenir à l'éditeur pour modifier votre choix
+        à tout moment (seul votre dernier vote sera pris en compte).
+      </p>
+      <div style="display: flex; gap: 1rem; justify-content: center;">
+        <NuxtLink :to="`/commune/${slug}`" class="btn btn-primary">
+          Modifier mon vote
+        </NuxtLink>
+        <NuxtLink to="/" class="btn btn-secondary">
+          Retour à l'accueil
+        </NuxtLink>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+const route = useRoute()
+const slug = route.params.slug as string
+</script>