feat: leads re-enable flow — detect removed leads on scan + Remove/Restore buttons

- QR scanner (single + multi): detect previously-removed leads via IDB enable flag;
  route to 'reenable' state instead of duplicate error; offer Re-activate button
- API fallback: if create fails and no IDB record, search API for disabled tracking
  record by event_exhibit_id + event_badge_id (adds qry_badge_id param to
  search__exhibit_tracking)
- Lead detail page: Replace raw enable checkbox with Remove Lead (two-click confirm,
  navigates back after) and Restore Lead card (shown when enable is falsy)
- Fix flash of disabled records in leads list: filter !enable in both filtered_lead_li
  derived and local IDB fast-path in handle_search_refresh
- eslint.config.js: disable svelte/no-navigation-without-resolve (no base path configured)
- Also includes _random field annotation cleanup (db_events, ae_types), iframe layout
  fixes, badge view tweaks, test updates, and doc updates from prior session

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/routes/events/[event_id]/(leads)/leads/+page.svelte

@@ -154,7 +154,7 @@
                 const local_ids = local_results
                     .map((e) => String(e.id || e.event_exhibit_id))
                     .filter(Boolean);
-                
+
                 if (current_search_id === last_search_id) {
                     if (log_lvl) console.log(`✅ [Trace] Exhibit Search #${current_search_id}: Local path found ${local_ids.length} items.`);
                     untrack(() => {
@@ -202,9 +202,9 @@
                 const api_ids = results
                     .map((e: any) => String(e.id || e.event_exhibit_id))
                     .filter(Boolean);
-                
+
                 if (log_lvl) console.log(`📦 [Trace] Exhibit Search #${current_search_id}: API revalidation found ${api_ids.length} items.`);
-                
+
                 untrack(() => {
                     exhibit_id_li = api_ids;
                     $events_sess.leads.submit_status__search = 'done';
@@ -241,9 +241,10 @@
             class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4 w-full max-w-6xl"
         >
             {#each $lq__event_exhibit_obj_li as exhibit_obj (exhibit_obj.event_exhibit_id)}
+                <!-- Force iframe mode (hides header/footer and passes exhibit_id via URL param) so the exhibit view can optimize for lead capture and hide irrelevant info. -->
                 <a
                     href="/events/{page.params
-                        .event_id}/leads/exhibit/{exhibit_obj.event_exhibit_id}"
+                        .event_id}/leads/exhibit/{exhibit_obj.event_exhibit_id}?iframe=true"
                     class="card card-hover p-4 flex flex-col items-center justify-center text-center space-y-2 preset-tonal"
                 >
                     <Store size="2em" />