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/utils/gratewizard.ts

@@ -0,0 +1,69 @@
+/** Ray-casting algorithm to test if a point is inside a polygon */
+export function pointInPolygon(lat: number, lng: number, polygon: [number, number][]): boolean {
+  let inside = false;
+  for (let i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
+    const [yi, xi] = polygon[i];
+    const [yj, xj] = polygon[j];
+    if ((yi > lat) !== (yj > lat) && lng < ((xj - xi) * (lat - yi)) / (yj - yi) + xi) {
+      inside = !inside;
+    }
+  }
+  return inside;
+}
+
+/** Format a number in French locale */
+export const fr = (n: number, decimals = 2) =>
+  n.toLocaleString('fr-FR', { minimumFractionDigits: decimals, maximumFractionDigits: decimals });
+
+export type CurrencyUnit = 'DU' | 'G1';
+
+/** Format a G1 value in the given unit, with k/M suffix */
+export function formatValue(g1Value: number, unit: CurrencyUnit, duDaily: number): string {
+  const val = unit === 'DU' ? g1Value / duDaily : g1Value;
+  const suffix = unit === 'DU' ? 'DU' : '\u011e1';
+  if (val >= 1_000_000) return fr(val / 1_000_000) + ' M' + suffix;
+  if (val >= 1_000) return fr(val / 1_000) + ' k' + suffix;
+  return fr(val) + ' ' + suffix;
+}
+
+/** Binary-search count of udBlocks entries >= joinBlock (udBlocks is sorted ascending). */
+export function countUdSince(udBlocks: number[], joinBlock: number): number {
+  let lo = 0, hi = udBlocks.length;
+  while (lo < hi) {
+    const mid = (lo + hi) >> 1;
+    if (udBlocks[mid] < joinBlock) lo = mid + 1;
+    else hi = mid;
+  }
+  return udBlocks.length - lo;
+}
+
+/** Date to ISO-like string (yyyy-mm-dd) */
+export const dateToString = (date: Date) =>
+  date.getFullYear() + '-' + ('0' + (date.getMonth() + 1)).slice(-2) + '-' + ('0' + date.getDate()).slice(-2);
+
+/** Number of days between a date and today */
+export const getDays = (date: string | undefined) => {
+  if (!date) return 0;
+  const d = new Date(date);
+  const today = new Date();
+  return Math.floor(Math.abs(d.getTime() - today.getTime()) / (1000 * 3600 * 24));
+};
+
+/** Seniority ratio between two dates (days from today) */
+export const getRatio = (date1: string | undefined, date2: string | undefined) => {
+  return getDays(date1) / Math.max(getDays(date2), 1);
+};
+
+export const Block0Date = '2017-03-08';
+
+export type Friend = {
+  name: string;
+  date: string;
+};
+
+export type TableFriend = Friend & {
+  [key: string]: string | number;
+  displayName: string;
+  displayDate: string;
+  du: number;
+};