Put the feedback and tickets admin areas behind the shared identity (#13)

Reviewed-on: #13
Co-authored-by: Patrick Müller <mail@pmueller.me>
Co-committed-by: Patrick Müller <mail@pmueller.me>

src/models/admin/admin.config.ts

@@ -73,8 +73,27 @@ const parseList = (value: string | undefined, fallback: string[]): string[] => {
 	return parsed.length > 0 ? parsed : fallback;
 };
 
-// The apps whose frontends may talk to /admin/* with credentials.
-export const APP_ORIGINS = parseList(process.env.APP_ORIGINS, []).map(origin => origin.replace(/\/$/, ''));
+/**
+ * The apps whose frontends may talk to /admin/* with credentials.
+ *
+ * They feed better-auth's `trustedOrigins`, which is what lets the tickets and
+ * feedback admin areas call /admin/auth/sign-out from their own origin. That
+ * became load-bearing with the step 4 cutover: before it, the only browser
+ * origin that ever reached /admin/auth was the admin app itself.
+ *
+ * Hence the production default rather than an empty list. An origin missing
+ * here fails in a way that is easy to misread - sign-in works, the app works,
+ * and only sign-out returns an origin error - so the two frontends we know
+ * about are named here and APP_ORIGINS overrides them for a staging host.
+ * Dev adds the localhost ports separately (see admin.auth.ts).
+ */
+const DEFAULT_APP_ORIGINS = [
+	'https://tickets.nachklang.art',
+	'https://feedback.nachklang.art'
+];
+
+export const APP_ORIGINS = parseList(process.env.APP_ORIGINS, DEFAULT_APP_ORIGINS)
+	.map(origin => origin.replace(/\/$/, ''));
 
 // Kept in sync by construction rather than by three separate lists: the admin
 // app itself always counts, and dev adds the local ports.