Standardize JWT authentication and finalize Activity Log V3 migration

src/lib/app_components/e_app_sign_in_out.svelte

@@ -64,6 +64,7 @@
     let show_password_text = $state('password'); // password or text
 
     function sign_in() {
+        $ae_loc.jwt = user_obj.jwt; // Store the JSON Web Token
         $ae_loc.person_id = person_id; // Set the person_id in the ae_loc store
         $ae_loc.person = person_obj; // Store the full person object for reference
         $ae_loc.user_id = user_id; // Set the user_id in the ae_loc store
@@ -112,6 +113,7 @@
 
     function sign_out() {
         // Clear the session information
+        $ae_loc.jwt = null;
         $ae_loc.person_id = null;
         $ae_loc.person = {};
         $ae_loc.user_id = null;