List the last visited workspace first in the rail

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/utils/last-visited-workspace-cookies.ts

@@ -0,0 +1,27 @@
+import { AppData } from "@/src/data/app-data";
+import type { CookieOptions } from "./cookies";
+
+type Params = {
+    workspace_id: number | string;
+    /**
+     * From `isSecureRequest`, so plain HTTP over a VPN still keeps it.
+     */
+    secure: boolean;
+};
+
+/**
+ * The cookie that remembers the workspace this browser was last in, for
+ * `setCookies`: read back by `readLastVisitedWorkspace` in the root, so the
+ * rail lists that workspace first. It never decides where `/admin/bots`
+ * lands. `HttpOnly`, since only the server reads it.
+ */
+export default function lastVisitedWorkspaceCookies({ workspace_id, secure }: Params): CookieOptions[] {
+    return [
+        {
+            name: AppData["LastVisitedWorkspaceCookieName"],
+            value: String(workspace_id),
+            secure,
+            maxAge: AppData["LastVisitedCookieMaxAgeSeconds"],
+        },
+    ];
+}