fix(pos): handle expired API sessions and add receipt preview close button

project/apps/pos/src/lib/api-client.ts

@@ -12,6 +12,15 @@ async function apiFetch<T>(path: string, init?: RequestInit): Promise<T> {
       ...(init?.headers ?? {}),
     },
   });
+  if (res.status === 401) {
+    if (typeof window !== 'undefined') {
+      window.location.href = '/login';
+    }
+    throw Object.assign(new Error('Sesión caducada, identifícate de nuevo'), {
+      status: 401,
+      code: 'UNAUTHORIZED',
+    });
+  }
   if (!res.ok) {
     const err = (await res.json().catch(() => ({ message: res.statusText }))) as {
       message?: string;
@@ -22,6 +31,15 @@ async function apiFetch<T>(path: string, init?: RequestInit): Promise<T> {
       code: err.error?.code,
     });
   }
+  // Defensive: if a proxy/misconfiguration ever returns HTML on a successful
+  // response, surface a readable message instead of a JSON parse crash.
+  const contentType = res.headers.get('content-type') ?? '';
+  if (!contentType.includes('application/json')) {
+    throw Object.assign(new Error('Respuesta inesperada del servidor (sesión o proxy)'), {
+      status: res.status,
+      code: 'INVALID_RESPONSE',
+    });
+  }
   return res.json() as Promise<T>;
 }