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>

tests/event_badge_attendee_workflow.test.ts

@@ -22,11 +22,11 @@ const template_id = 'jgfixEpYp1B';
 const mock_badge = {
     id:                               badge_id,
     event_badge_id:                   badge_id,
-    event_badge_id_random:            badge_id,
+    event_badge_id_random:            badge_id, // NO LONGER USE "_random"
     event_id:                         event_id,
     event_id_random:                  event_id,
     event_badge_template_id:          template_id,
-    event_badge_template_id_random:   template_id,
+    event_badge_template_id_random:   template_id, // NO LONGER USE "_random"
     full_name_override:               'Scott Idem',
     given_name:                       'Scott',
     family_name:                      'Idem',
@@ -41,7 +41,7 @@ const mock_badge = {
 
 const mock_template = {
     id:                       template_id,
-    id_random:                template_id,
+    id_random:                template_id, // NO LONGER USE "_random"
     event_badge_template_id:  template_id,
     badge_template_id:        template_id,
     event_id:                 event_id,

tests/event_badge_render.test.ts

@@ -42,11 +42,11 @@ function make_badge(badge_id: string, template_id: string, overrides: Record<str
     return {
         id:                             badge_id,
         event_badge_id:                 badge_id,
-        event_badge_id_random:          badge_id,
+        event_badge_id_random:          badge_id,// NO LONGER USE "_random"
         event_id:                       event_id,
-        event_id_random:                event_id,
+        event_id_random:                event_id,// NO LONGER USE "_random"
         event_badge_template_id:        template_id,
-        event_badge_template_id_random: template_id,
+        event_badge_template_id_random: template_id,// NO LONGER USE "_random"
         full_name:                      'Jane Doe',
         full_name_override:             null,
         given_name:                     'Jane',