feat: indicateurs de statut et configuration des endpoints SubSquid/Cesium+

- Dots de statut en temps réel dans le StatsPanel (ok/slow/error + latence)
- Bannière d'alerte si un service est inaccessible
- EndpointPopover : sélection parmi nœuds connus, test de latence live, URL custom
- Rechargement automatique des données après changement d'endpoint
- SubsquidAdapter et CesiumAdapter lisent l'URL active depuis EndpointConfig
- InfoPanel mis à jour (overlay DU + statut des services)

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

src/services/EndpointConfig.ts

@@ -0,0 +1,35 @@
+const STORAGE_KEY = {
+  subsquid: 'geoflux-ep-subsquid',
+  cesium:   'geoflux-ep-cesium',
+} as const;
+
+export const DEFAULT_ENDPOINTS = {
+  subsquid: 'https://squidv2s.syoul.fr/v1/graphql',
+  cesium:   'https://g1.data.e-is.pro',
+} as const;
+
+export const KNOWN_SUBSQUID_NODES: { label: string; url: string }[] = [
+  { label: 'squidv2s.syoul.fr (défaut)', url: 'https://squidv2s.syoul.fr/v1/graphql' },
+];
+
+export const KNOWN_CESIUM_NODES: { label: string; url: string }[] = [
+  { label: 'g1.data.e-is.pro (défaut)', url: 'https://g1.data.e-is.pro' },
+];
+
+export function getSubsquidUrl(): string {
+  return localStorage.getItem(STORAGE_KEY.subsquid) ?? DEFAULT_ENDPOINTS.subsquid;
+}
+
+export function getCesiumUrl(): string {
+  return localStorage.getItem(STORAGE_KEY.cesium) ?? DEFAULT_ENDPOINTS.cesium;
+}
+
+export function setSubsquidUrl(url: string): void {
+  if (url === DEFAULT_ENDPOINTS.subsquid) localStorage.removeItem(STORAGE_KEY.subsquid);
+  else localStorage.setItem(STORAGE_KEY.subsquid, url);
+}
+
+export function setCesiumUrl(url: string): void {
+  if (url === DEFAULT_ENDPOINTS.cesium) localStorage.removeItem(STORAGE_KEY.cesium);
+  else localStorage.setItem(STORAGE_KEY.cesium, url);
+}

src/services/adapters/CesiumAdapter.ts

@@ -12,6 +12,7 @@
  */
 
 import { z } from 'zod';
+import { getCesiumUrl } from '../EndpointConfig';
 
 export const CESIUM_ENDPOINT = 'https://g1.data.e-is.pro';
 
@@ -136,7 +137,7 @@ export async function resolveGeoByKeys(
     _source: ['title', 'city', 'geoPoint'],
   };
 
-  const response = await fetch(`${CESIUM_ENDPOINT}/user/profile/_search`, {
+  const response = await fetch(`${getCesiumUrl()}/user/profile/_search`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify(query),
@@ -210,7 +211,7 @@ export async function resolveGeoByNames(
     _source: ['title', 'city', 'geoPoint'],
   };
 
-  const response = await fetch(`${CESIUM_ENDPOINT}/user/profile/_search`, {
+  const response = await fetch(`${getCesiumUrl()}/user/profile/_search`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify(query),

src/services/adapters/SubsquidAdapter.ts

@@ -12,6 +12,7 @@
  */
 
 import { z } from 'zod';
+import { getSubsquidUrl } from '../EndpointConfig';
 
 export const SUBSQUID_ENDPOINT = 'https://squidv2s.syoul.fr/v1/graphql';
 
@@ -136,7 +137,7 @@ const IDENTITY_KEY_MAP_QUERY = `
  *   car previousId = clé génesis = clé Ed25519 v1 = _id dans Cesium+
  */
 export async function buildIdentityKeyMap(): Promise<Map<string, string>> {
-  const response = await fetch(SUBSQUID_ENDPOINT, {
+  const response = await fetch(getSubsquidUrl(), {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify({ query: IDENTITY_KEY_MAP_QUERY }),
@@ -157,7 +158,7 @@ export async function buildIdentityKeyMap(): Promise<Map<string, string>> {
 export async function fetchCurrentUD(): Promise<number> {
   const UD_FALLBACK = 11.78; // valeur au bloc 225874 — mis à jour si la requête échoue
   try {
-    const response = await fetch(SUBSQUID_ENDPOINT, {
+    const response = await fetch(getSubsquidUrl(), {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({
@@ -193,7 +194,7 @@ const ACTIVE_MEMBERS_QUERY = `
 
 /** Retourne la liste des clés SS58 de tous les membres WoT actifs. */
 export async function fetchActiveMemberKeys(): Promise<string[]> {
-  const res = await fetch(SUBSQUID_ENDPOINT, {
+  const res = await fetch(getSubsquidUrl(), {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify({ query: ACTIVE_MEMBERS_QUERY }),
@@ -222,7 +223,7 @@ export async function fetchTransfers(
     Date.now() - periodDays * 24 * 60 * 60 * 1000
   ).toISOString();
 
-  const response = await fetch(SUBSQUID_ENDPOINT, {
+  const response = await fetch(getSubsquidUrl(), {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify({