fix: portail laissant passer /health mais bloquant /v1 traité comme liaison en échec (v2.4.0.3) (#18)

- Une page web reçue sur /v1/capabilities fait échouer la connexion et le test
  de liaison même si /health répond, ce qui déclenche la recherche de l'API.
- La découverte sonde /v1/capabilities puis /v1/models (JSON exigé, 401/403
  accepté) avant /health, pour ne pas prendre un portail pour l'API.


Claude-Session: https://claude.ai/code/session_017Wn5VX9HNbJ7N54hR24u9Y

Co-authored-by: Claude <noreply@anthropic.com>

src/components/settings/SettingsDrawer.tsx

@@ -108,6 +108,7 @@ export function SettingsDrawer({ onClose }: Props) {
         caps = ` · modèle ${String(c.model ?? '?')} · ${Object.entries(c.features ?? {}).filter(([, v]) => v === true).length} fonctions`;
       } catch (err) {
         const message = (err as Error).message;
+        if (/page web/.test(message)) throw err;
         caps = /404/.test(message)
           ? ' · /v1/capabilities absent (Hermes ancien : transport chat completions)'
           : ` · capabilities : ${message}`;

src/services/hermes/client.ts

@@ -72,18 +72,30 @@ export function hermesUrlCandidates(url: string): string[] {
   return [...out];
 }
 
-/** Probe candidate URLs until one answers Hermes JSON on /health or /v1/capabilities. */
+/** True when this base URL answers like the Hermes API (JSON on /v1/*, or 401/403 = key required). */
+export async function probeHermesUrl(config: HermesConfig, url: string): Promise<boolean> {
+  const client = new HermesClient({ ...config, url });
+  for (const path of ['/v1/capabilities', '/v1/models', '/health']) {
+    try {
+      const payload = await client.request<unknown>(path, { timeoutMs: 4000 });
+      if (payload && typeof payload === 'object') return true;
+    } catch (err) {
+      if (err instanceof HttpError) {
+        if (err.status === 401 || err.status === 403) return true; // the API is there, only the key is missing
+        if (/page web/.test(err.message)) return false; // a portal answers on this host: not the API
+        if (err.status === 404) continue; // older Hermes without this endpoint
+      }
+      return false;
+    }
+  }
+  return false;
+}
+
+/** Probe candidate URLs until one answers like the Hermes API. */
 export async function discoverHermesUrl(config: HermesConfig, onProgress?: (url: string) => void): Promise<string | null> {
   for (const candidate of hermesUrlCandidates(config.url)) {
     onProgress?.(candidate);
-    const client = new HermesClient({ ...config, url: candidate });
-    try {
-      await client.request<unknown>('/health', { timeoutMs: 4000 });
-      return candidate;
-    } catch (err) {
-      if (err instanceof HttpError && (err.status === 401 || err.status === 403)) return candidate; // API found, key missing
-      continue;
-    }
+    if (await probeHermesUrl(config, candidate)) return candidate;
   }
   return null;
 }

src/state/hermes.ts

@@ -122,6 +122,8 @@ export const useHermes = create<HermesStore>((set, get) => ({
       try {
         capabilities = await client.capabilities();
       } catch (err) {
+        // A web page on /v1/* means the whole API is behind a portal even if /health passed through.
+        if (/page web/.test((err as Error).message)) throw err;
         Log.warn('hermes', `capabilities unavailable: ${(err as Error).message}`);
       }
       const transport = resolveTransport(config, capabilities);