feat(leads): implement reactive search for exhibitors and lead tracking

- Implemented V3-style reactive search (Local Cache -> Remote Revalidation) for exhibitors.
- Standardized search fields to 'name' for Exhibits and 'event_badge_full_name' for Lead Tracking.
- Refactored Leads UI with standardized search components and grid layout.
- Updated event routing to exclusively use string-based IDs (Triple-ID pattern).
- Hardened 'ae_EventSession' type definitions to handle null values from V3 API/Dexie.

src/lib/ae_events_functions.ts

@@ -9,6 +9,8 @@ import * as event_file from '$lib/ae_events/ae_events__event_file';
 import {
     load_ae_obj_id__exhibit,
     load_ae_obj_li__exhibit,
+    search__exhibit,
+    search__exhibit_tracking,
     load_ae_obj_id__exhibit_tracking,
     load_ae_obj_li__exhibit_tracking,
     create_ae_obj__exhibit_tracking,
@@ -68,8 +70,10 @@ const export_obj = {
     // Event Exhibits
     handle_load_ae_obj_id__exhibit: load_ae_obj_id__exhibit,
     handle_load_ae_obj_li__exhibit: load_ae_obj_li__exhibit,
+    search__exhibit: search__exhibit,
     handle_load_ae_obj_id__exhibit_tracking: load_ae_obj_id__exhibit_tracking,
     handle_load_ae_obj_li__exhibit_tracking: load_ae_obj_li__exhibit_tracking,
+    search__exhibit_tracking: search__exhibit_tracking,
     handle_create_ae_obj__exhibit_tracking: create_ae_obj__exhibit_tracking,
     handle_update_ae_obj__exhibit_tracking: update_ae_obj__exhibit_tracking,
     handle_download_export__event_exhibit_tracking: download_export__event_exhibit_tracking,