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/users/+page.svelte

@@ -3,8 +3,7 @@
     import { load_ae_obj_li__user, create_ae_obj__user } from '$lib/ae_core/ae_core__user';
     import { ae_api, ae_loc } from '$lib/stores/ae_stores';
     import { goto } from '$app/navigation';
-    import { Plus, Search, User, ShieldCheck, Mail, Globe, Landmark, ListFilter, X, Fingerprint, Activity } from 'lucide-svelte';
-
+    import { Activity, Fingerprint, Globe, Landmark, ListFilter, Mail, Plus, Search, ShieldCheck, User, X } from '@lucide/svelte';
     let user_li: any[] = $state([]);
     let loading = $state(true);
     let qry_str = $state('');