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/stores/commune.ts

@@ -0,0 +1,48 @@
+import { defineStore } from 'pinia'
+
+interface Commune {
+  id: number
+  name: string
+  slug: string
+  description: string
+  is_active: boolean
+}
+
+interface TariffParams {
+  abop: number
+  abos: number
+  recettes: number
+  pmax: number
+  vmax: number
+}
+
+export const useCommuneStore = defineStore('commune', {
+  state: () => ({
+    communes: [] as Commune[],
+    current: null as Commune | null,
+    params: null as TariffParams | null,
+    loading: false,
+  }),
+
+  actions: {
+    async fetchCommunes() {
+      this.loading = true
+      try {
+        const api = useApi()
+        this.communes = await api.get<Commune[]>('/communes/')
+      } finally {
+        this.loading = false
+      }
+    },
+
+    async fetchCommune(slug: string) {
+      const api = useApi()
+      this.current = await api.get<Commune>(`/communes/${slug}`)
+    },
+
+    async fetchParams(slug: string) {
+      const api = useApi()
+      this.params = await api.get<TariffParams>(`/communes/${slug}/params`)
+    },
+  },
+})