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/+layout.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
     /** @type {import('./$types').LayoutData} */
-    // /** @type {import('./$types').LayoutProps} */
 
     let log_lvl: number = 0;
 
@@ -11,13 +10,6 @@
     import '../app.css';
 
     // *** Import other supporting libraries
-    // import {
-    //     ArrowBigRight,
-    //     CircleX,
-    //     RefreshCw,
-    //     RefreshCcw,
-    //     RefreshCcwDot
-    // } from '@lucide/svelte';
 
     // Highlight JS
     import hljs from 'highlight.js/lib/core';
@@ -39,13 +31,10 @@
     // import Analytics from '$lib/app_components/e_app_analytics.svelte';
     import { ae_loc, ae_sess, ae_api, slct, slct_trigger, ae_auth_error } from '$lib/stores/ae_stores';
     import { LoaderCircle } from '@lucide/svelte';
-    // import { events_loc, events_slct } from '$lib/stores/ae_events_stores';
 
-    // import MyClipboard from '$lib/app_components/e_app_clipboard.svelte';
     import E_app_debug_menu from '$lib/app_components/e_app_debug_menu.svelte';
     import E_app_sys_bar from '$lib/app_components/e_app_sys_bar.svelte';
     import { pwa_install } from '$lib/pwa/pwa_install.svelte';
-    // import E_app_sys_menu from '$lib/app_components/e_app_sys_menu.svelte'; // replaced by E_app_sys_bar
 
     interface Props {
         data: any;