yarm6mesq: Refresh expired tokens and revoke on sign-out

src/lib/auth-client.ts

@@ -30,6 +30,19 @@ export async function loadSession(f: Fetch = fetch): Promise<Person | null> {
   }
 }
 
+/**
+ * DELETE /api/session: sign out. Resolves once the server has cleared the
+ * session and cookie. A failed request still returns the UI to signed-out,
+ * because the local session view is no longer trustworthy.
+ */
+export async function signOut(f: Fetch = fetch): Promise<void> {
+  try {
+    await f("/api/session", { method: "DELETE", credentials: "same-origin", cache: "no-store" });
+  } catch {
+    // Ignore: the caller returns to the sign-in screen regardless.
+  }
+}
+
 export type SignInResult = { ok: true; person: Person } | { ok: false; message: string };
 
 /** POST /api/session. A 401 is always the one wrong-credentials message. */