fix: handle Authentik session expiry in SPA

- authFetch uses redirect:'manual' to detect 302 from Authentik
- If session expired (302/401/opaqueredirect), reload page to trigger
  Traefik forwardAuth → Authentik re-login flow
- Logout redirects to Authentik invalidation flow
- App.vue calls checkSession on mount to populate user identity

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/App.vue

@@ -3,7 +3,9 @@
 </template>
 
 <script setup>
-// Auth is handled by Authentik forwardAuth at the Traefik level.
-// If the user reaches this page, they are already authenticated.
-// The X-authentik-email header identifies the user.
+import { onMounted } from 'vue'
+import { useAuthStore } from 'src/stores/auth'
+
+const auth = useAuthStore()
+onMounted(() => auth.checkSession())
 </script>

src/api/auth.js

@@ -1,6 +1,7 @@
-// ── ERPNext API auth — service token ────────────────────────────────────────
-// All ERPNext API calls use a service token. User identity comes from Authentik
-// headers at the Traefik level (X-authentik-email, X-authentik-name).
+// ── ERPNext API auth — service token + Authentik session guard ──────────────
+// ERPNext API calls use a service token. User auth is via Authentik forwardAuth
+// at the Traefik level. If the Authentik session expires mid-use, API calls
+// get redirected (302) — we detect this and reload to trigger re-auth.
 // ─────────────────────────────────────────────────────────────────────────────
 import { BASE_URL } from 'src/config/erpnext'
 
@@ -8,23 +9,34 @@ const SERVICE_TOKEN = 'b273a666c86d2d0:613842e506d13b8'
 
 export function authFetch (url, opts = {}) {
   opts.headers = { ...opts.headers, Authorization: 'token ' + SERVICE_TOKEN }
-  return fetch(url, opts)
+  opts.redirect = 'manual'  // Don't follow redirects — detect Authentik 302
+  return fetch(url, opts).then(res => {
+    // If Traefik/Authentik redirects (session expired), reload page to re-auth
+    if (res.type === 'opaqueredirect' || res.status === 302 || res.status === 401) {
+      window.location.reload()
+      return new Response('{}', { status: 401 })
+    }
+    return res
+  })
 }
 
 export function getCSRF () { return null }
 export function invalidateCSRF () {}
 
-export async function login () { /* handled by Authentik */ }
+export async function login () { window.location.reload() }
 export async function logout () {
-  window.location.href = 'https://auth.targo.ca/application/o/gigafibre-dispatch/end-session/'
+  window.location.href = 'https://auth.targo.ca/if/flow/default-invalidation-flow/'
 }
 
 export async function getLoggedUser () {
   try {
-    const res = await authFetch(BASE_URL + '/api/method/frappe.auth.get_logged_user')
+    const res = await fetch(BASE_URL + '/api/method/frappe.auth.get_logged_user', {
+      headers: { Authorization: 'token ' + SERVICE_TOKEN },
+    })
+    if (res.ok) {
       const data = await res.json()
       return data.message || 'authenticated'
-  } catch {
-    return 'authenticated' // Authentik guarantees auth even if ERPNext is down
     }
+  } catch {}
+  return 'authenticated'
 }