Fix Activity Log visibility and search query construction

- Changed default 'enabled' and 'hidden' filters to 'all' for activity logs
- Refactored qry__activity_log to avoid sending empty 'and' arrays
- Ensured consistent filtering between API function and UI

src/routes/core/activity_logs/+page.svelte

@@ -23,6 +23,8 @@
             api_cfg: $ae_api,
             account_id: $ae_loc.account_id,
             qry_str: qry_str || undefined,
+            enabled: 'all',
+            hidden: 'all',
             limit: limit,
             log_lvl: 1
         });