fix: change auth/V3user to auth/user (#824)

* fix: change auth/V3user to auth/user

Signed-off-by: Andy Lee <andy.lee@suse.com>

* refactor: extract to utils/auth.js

Signed-off-by: Andy Lee <andy.lee@suse.com>

---------

Signed-off-by: Andy Lee <andy.lee@suse.com>

pkg/harvester/utils/auth.js

@@ -0,0 +1,31 @@
+/**
+ * Resolve the Harvester username from Vuex getters.
+ *
+ * Works with both `this.$store.getters` (in components) and
+ * `this.$rootGetters` (in Steve models).
+ *
+ * - In single-product (standalone Harvester) mode, always returns the
+ *   default username (`admin`).
+ * - Otherwise, falls back to the authenticated user's `username` or `id`.
+ */
+export function getHarvesterUserName(getters, defaultUserName = 'admin') {
+  const isSingleProduct = getters?.['isSingleProduct'];
+
+  if (isSingleProduct) {
+    return defaultUserName;
+  }
+
+  const user = getHarvesterUser(getters);
+
+  return user?.username || user?.id || defaultUserName;
+}
+
+/**
+ * Return the authenticated user object from Vuex getters.
+ *
+ * Works with both `this.$store.getters` (in components) and
+ * `this.$rootGetters` (in Steve models).
+ */
+export function getHarvesterUser(getters) {
+  return getters?.['auth/user'];
+}