Migrate grateWizard from React/Next.js to native Nuxt integration

- Port all React components to Vue 3 (GwTabs, GwMN, GwCRA, GwCRS,
  GwMap, GwRelations, GwPerimeterList)
- Port hooks to Vue composables (useCesiumProfiles, useSavedPerimeters)
- Copy pure TS services and utils (duniter/, ss58, gratewizard utils)
- Add Leaflet + Geoman + MarkerCluster dependencies
- Serve grateWizard as popup via /gratewizard?popup (layout: false)
  and info page on /gratewizard (with Librodrome layout)
- Remove public/gratewizard-app/ static Next.js export
- Refine UI: compact tabs, buttons, inputs, cards, perimeter list
- Use Ğ1 breve everywhere, French locale for all dates and amounts
- Rename roles: vendeur→offre / acheteur→reçoit le produit ou service
- Rename prix→évaluation in all visible text
- Add calculated result column in CRA and CRS relation tables
- DU/Ğ1 selector uses toggle switch (same as role toggle)
- Auto-scroll to monetary data card on polygon selection

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

app/composables/useSavedPerimeters.ts

@@ -0,0 +1,24 @@
+export type SavedPerimeter = {
+  name: string;
+  polygon: [number, number][];
+  createdAt: string;
+};
+
+const STORAGE_KEY = 'gw-saved-perimeters';
+
+export function useSavedPerimeters() {
+  const perimeters = useLocalStorage<SavedPerimeter[]>(STORAGE_KEY, []);
+
+  function savePerimeter(name: string, polygon: [number, number][]) {
+    perimeters.value = [
+      ...perimeters.value.filter((p) => p.name !== name),
+      { name, polygon, createdAt: new Date().toISOString() },
+    ];
+  }
+
+  function deletePerimeter(name: string) {
+    perimeters.value = perimeters.value.filter((p) => p.name !== name);
+  }
+
+  return { perimeters, savePerimeter, deletePerimeter };
+}