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/ss58.ts

@@ -0,0 +1,109 @@
+const BASE58_ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
+
+const ALPHABET_MAP = new Map<string, number>();
+for (let i = 0; i < BASE58_ALPHABET.length; i++) {
+  ALPHABET_MAP.set(BASE58_ALPHABET[i], i);
+}
+
+export function base58Decode(str: string): Uint8Array {
+  if (str.length === 0) return new Uint8Array(0);
+
+  // Count leading '1's (zero bytes)
+  let leadingZeros = 0;
+  while (leadingZeros < str.length && str[leadingZeros] === '1') {
+    leadingZeros++;
+  }
+
+  // Decode base58 to big integer (stored as byte array)
+  const size = Math.ceil(str.length * 733 / 1000) + 1; // log(58) / log(256)
+  const bytes = new Uint8Array(size);
+
+  for (let i = leadingZeros; i < str.length; i++) {
+    const val = ALPHABET_MAP.get(str[i]);
+    if (val === undefined) throw new Error(`Invalid base58 character: ${str[i]}`);
+
+    let carry = val;
+    for (let j = size - 1; j >= 0; j--) {
+      carry += 256 * bytes[j];
+      bytes[j] = carry % 256;
+      carry = Math.floor(carry / 256);
+    }
+  }
+
+  // Skip leading zeros in the decoded bytes
+  let start = 0;
+  while (start < size && bytes[start] === 0) {
+    start++;
+  }
+
+  const result = new Uint8Array(leadingZeros + (size - start));
+  // Leading zeros from '1' characters
+  for (let i = 0; i < leadingZeros; i++) {
+    result[i] = 0;
+  }
+  // Decoded bytes
+  for (let i = start; i < size; i++) {
+    result[leadingZeros + (i - start)] = bytes[i];
+  }
+
+  return result;
+}
+
+export function base58Encode(bytes: Uint8Array): string {
+  if (bytes.length === 0) return '';
+
+  // Count leading zero bytes
+  let leadingZeros = 0;
+  while (leadingZeros < bytes.length && bytes[leadingZeros] === 0) {
+    leadingZeros++;
+  }
+
+  // Encode to base58
+  const size = Math.ceil(bytes.length * 138 / 100) + 1; // log(256) / log(58)
+  const digits = new Uint8Array(size);
+
+  for (let i = leadingZeros; i < bytes.length; i++) {
+    let carry = bytes[i];
+    for (let j = size - 1; j >= 0; j--) {
+      carry += 256 * digits[j];
+      digits[j] = carry % 58;
+      carry = Math.floor(carry / 58);
+    }
+  }
+
+  // Skip leading zeros in base58 output
+  let start = 0;
+  while (start < size && digits[start] === 0) {
+    start++;
+  }
+
+  let result = '1'.repeat(leadingZeros);
+  for (let i = start; i < size; i++) {
+    result += BASE58_ALPHABET[digits[i]];
+  }
+
+  return result;
+}
+
+/**
+ * Convert an SS58 address to a base58-encoded raw pubkey (Cesium+ v1 format).
+ *
+ * SS58 layout: [prefix (1 or 2 bytes)] [32 bytes pubkey] [2 bytes checksum]
+ * - If first byte has bit 6 set (& 0x40), prefix is 2 bytes
+ * - Otherwise prefix is 1 byte
+ */
+export function ss58ToV1Pubkey(ss58: string): string {
+  const raw = base58Decode(ss58);
+
+  // Determine prefix length
+  const prefixLen = (raw[0] & 0x40) ? 2 : 1;
+
+  // Extract 32-byte pubkey (skip prefix, drop 2-byte checksum)
+  const pubkey = raw.slice(prefixLen, prefixLen + 32);
+
+  if (pubkey.length !== 32) {
+    throw new Error(`Invalid SS58 address: expected 32-byte pubkey, got ${pubkey.length}`);
+  }
+
+  return base58Encode(pubkey);
+}