chore: migrate all FA icons to Lucide (@lucide/svelte)

- Replaced all active FontAwesome <span class="fas fa-*"> icons with
  Lucide components across 145 files (excluding /idaa/ which is intentional)
- Fixed merge script bug: consolidated lucide-svelte imports into @lucide/svelte
- Replaced dynamic toggle patterns (fa-toggle-on/off) with ToggleRight/ToggleLeft
- Replaced fa-eye/fa-eye-slash with Eye/EyeOff
- Replaced fa-bug/fa-bug-slash with Bug/BugOff
- Replaced fa-sync fa-spin with RefreshCw + animate-spin
- Replaced fa-microchip with Cpu
- Fixed {@const} placement in element_manage_event_file_li.svelte
- Removed obsolete CSS hover rules for .unlock_icon/.lock_icon
- svelte-check: 0 errors, 0 warnings

src/routes/core/accounts/+page.svelte

@@ -3,8 +3,7 @@
     import { load_ae_obj_li__account, create_ae_obj__account } from '$lib/ae_core/ae_core__account';
     import { ae_api, ae_loc, slct } from '$lib/stores/ae_stores';
     import { goto } from '$app/navigation';
-    import { FileText, Plus, Search, Building, ListFilter, RefreshCcw, X, ExternalLink, Calendar, ShieldCheck } from 'lucide-svelte';
-
+    import { Building, Calendar, ExternalLink, FileText, ListFilter, Plus, RefreshCcw, Search, ShieldCheck, X } from '@lucide/svelte';
     let account_li: any[] = $state([]);
     let loading = $state(true);
     let qry_enabled = $state('all');

src/routes/core/accounts/[account_id]/+page.svelte

@@ -5,8 +5,7 @@
     import { editable_fields__account } from '$lib/ae_core/ae_core__account.editable_fields';
     import { ae_api, ae_loc } from '$lib/stores/ae_stores';
     import { goto } from '$app/navigation';
-    import { Save, Trash2, ArrowLeft, Building, Settings, Activity, Info } from 'lucide-svelte';
-
+    import { Activity, ArrowLeft, Building, Info, Save, Settings, Trash2 } from '@lucide/svelte';
     let account_id = $derived($page.params.account_id ?? '');
     let account: any = $state(null);
     let loading = $state(true);