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/events/ae_comp__event_files_upload.svelte

@@ -3,7 +3,7 @@
      * src/routes/events/ae_comp__event_files_upload.svelte
      * Specialized component for uploading files and automatically linking them to Event objects.
      */
-    import { LoaderCircle, Upload, UploadCloud } from 'lucide-svelte';
+    import { LoaderCircle, Upload, UploadCloud } from '@lucide/svelte';
     import Element_input_files_tbl from '$lib/elements/element_input_files_tbl.svelte';
 
     // Import storage, functions, and libraries