From 7c8991d5ce91be7c36bcb6d78e250b35d8956ffe Mon Sep 17 00:00:00 2001
From: jtricerolph <info@tricerolph.com>
Date: Sun, 12 Jul 2026 20:09:17 +0000
Subject: [PATCH] Redirect to login on mid-session 401 instead of silently
 failing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 frontend/src/api.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/frontend/src/api.ts b/frontend/src/api.ts
index 3ae9074..fa93d10 100644
--- a/frontend/src/api.ts
+++ b/frontend/src/api.ts
@@ -4,6 +4,10 @@ const BASE = '/twin-optimiser/api'
 
 async function request<T>(path: string, opts?: RequestInit): Promise<T> {
   const res = await fetch(BASE + path, { credentials: 'include', ...opts })
+  if (res.status === 401) {
+    ;(window.top ?? window).location.href = '/login'
+    throw new Error('Unauthenticated')
+  }
   if (!res.ok) {
     const body = await res.json().catch(() => ({})) as { error?: string }
     throw new Error(body.error || `HTTP ${res.status}`)