security update

lib/services/storage/settingsStorage.js

@@ -67,6 +67,19 @@ export async function getSettings() {
   return cachedSettingsConfig;
 }
 
+/**
+ * Get or create a persistent session signing secret.
+ * Generated once and stored in the settings table under the key 'session_secret'.
+ * @returns {Promise<string>}
+ */
+export async function getOrCreateSessionSecret() {
+  const settings = await getSettings();
+  if (settings.session_secret) return settings.session_secret;
+  const secret = nanoid(64);
+  upsertSettings({ session_secret: secret });
+  return secret;
+}
+
 /**
  * Upsert settings rows.
  * - Accepts an object map of name -> value, or an entry {name, value}.