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/[event_id]/(launcher)/launcher_cfg.svelte

@@ -32,8 +32,7 @@
     import Launcher_Cfg_Screen_Saver from './cfg_components/launcher_cfg_screen_saver.svelte';
     import Launcher_Cfg_App_Modes from './cfg_components/launcher_cfg_app_modes.svelte';
     import Launcher_Cfg_Local_Actions from './cfg_components/launcher_cfg_local_actions.svelte';
-    import { Settings, Pencil, X, SlidersHorizontal, Monitor, Code, RefreshCw, Bug } from 'lucide-svelte';
-
+    import { Bug, Code, Monitor, Pencil, RefreshCw, Settings, SlidersHorizontal, X } from '@lucide/svelte';
     // UI Tab State
     // Tabs are audience-oriented:
     //   setup   — what every onsite operator needs (mode preset, display, WS, screen saver)