admin role enhancment

basic invitation flow

apps/admin/src/lib/validation/schemas.ts

@@ -16,9 +16,12 @@ export const passwordSchema = z
 export const phoneSchema = z
   .string()
   .optional()
-  .refine((val) => !val || /^\+?[1-9]\d{1,14}$/.test(val), {
-    message: "Invalid phone number format",
-  });
+  .refine(
+    (val) => !val || val.trim() === "" || /^\+?[1-9]\d{1,14}$/.test(val),
+    {
+      message: "Invalid phone number format",
+    },
+  );
 
 export const dateTimeSchema = z.string().datetime("Invalid datetime format");