style: FA→Lucide migration in remaining core admin files

- person_view.svelte: converted all FA spans including complex {#if} refactor
  of {@html} ternary string patterns (hide/enable/priority/auth_key buttons)
- people/[person_id]/+page.svelte: ArrowLeft, HelpCircle, LoaderCircle
- ae_comp__person_obj_tbl.svelte: Building2, ListOrdered, Mail, Unlink, User, UserCheck
- migrate script: added fa-archive, fa-link-slash, fa-question-circle mappings

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

scripts/migrate_fa_to_lucide.py

@@ -107,6 +107,9 @@ FA_TO_LUCIDE = {
     'fa-user-ninja':         'UserRound',
     'fa-user-tie':           'UserRound',
     'fa-video':              'Video',
+    'fa-archive':            'Archive',
+    'fa-link-slash':         'Unlink',
+    'fa-question-circle':    'HelpCircle',
 }
 
 # Skip modifiers — not real icon names