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/hosted_files/+page.svelte

@@ -9,8 +9,7 @@
     import type { key_val } from '$lib/stores/ae_stores';
 
     import Element_manage_hosted_file_li_wrap from '$lib/elements/element_manage_hosted_file_li_all.svelte';
-    import { Video } from 'lucide-svelte';
-
+    import { Video } from '@lucide/svelte';
     let { data } = $props();
 
     let log_lvl = 0;

src/routes/hosted_files/video_util/+page.svelte

@@ -15,8 +15,7 @@
     import Comp_hosted_files_clip_video_li from '$lib/ae_core/ae_comp__hosted_files_clip_video_li.svelte';
 
     import Element_manage_hosted_file_li_wrap from '$lib/elements/element_manage_hosted_file_li_all.svelte';
-    import { ArrowLeftRight, Trash2, Upload } from 'lucide-svelte';
-
+    import { ArrowLeftRight, Trash2, Upload } from '@lucide/svelte';
     let { data } = $props();
 
     let log_lvl = 1;

src/routes/hosted_files/video_util/hold_video_util.svelte

@@ -9,8 +9,7 @@
     import Comp_hosted_files_clip_video_li from '$lib/ae_core/ae_comp__hosted_files_clip_video_li.svelte';
 
     import Element_manage_hosted_file_li_wrap from '$lib/elements/element_manage_hosted_file_li_all.svelte';
-    import { ArrowLeftRight, Trash2, Upload } from 'lucide-svelte';
-
+    import { ArrowLeftRight, Trash2, Upload } from '@lucide/svelte';
     let log_lvl = 1;
 
     let ae_promises: key_val = {};