Overhaul Exhibitor Leads Manage tab and resolve all TypeScript errors

- Implemented full Staff License management (CRUD for license_li_json).
- Added Admin Tools section for managers (Payment status, Max licenses, Device counts).
- Implemented App Settings (Refresh interval, navigation preferences, cache management).
- Fixed all remaining TypeScript errors in Badge and Presentation modules.
- Integrated Payment tab conditional visibility logic.

src/routes/events/[event_id]/(pres_mgmt)/session/[session_id]/+page.svelte

@@ -155,11 +155,13 @@
 
     // JSON formatted configuration options for an event, and specifically for the presentation management module.
     $effect(() => {
-        if ($lq__event_obj?.mod_pres_mgmt_json) {
+        const remote_cfg = $lq__event_obj?.mod_pres_mgmt_json;
+        const local_cfg = $events_loc?.pres_mgmt;
+        if (remote_cfg && local_cfg) {
             untrack(() => {
                 events_func.sync_config__event_pres_mgmt({
-                    pres_mgmt_cfg_remote: $lq__event_obj?.mod_pres_mgmt_json,
-                    pres_mgmt_cfg_local: $events_loc?.pres_mgmt,
+                    pres_mgmt_cfg_remote: remote_cfg,
+                    pres_mgmt_cfg_local: local_cfg,
                     log_lvl: log_lvl
                 });
             });