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/lib/app_components/e_app_help_tech.svelte

@@ -39,27 +39,7 @@
     import { goto } from '$app/navigation';
 
     // *** Import other supporting libraries
-    import {
-        // ArrowBigRight,
-        BadgeQuestionMark,
-        ChevronDown,
-        ChevronRight,
-        // CircleX,
-        // Copy,
-        // Eye, EyeOff,
-        // Key,
-        LifeBuoy,
-        // LogIn, LogOut, LockKeyhole,
-        // Mail, MailCheck,
-        // Menu,
-        RefreshCw,
-        // RefreshCcw,
-        // RefreshCcwDot,
-        // ShieldEllipsis, ShieldMinus, ShieldPlus, ShieldUser,
-        SquareX
-        // User, UserCheck
-    } from '@lucide/svelte';
-
+    import { BadgeQuestionMark, ChevronDown, ChevronRight, LifeBuoy, RefreshCw, SquareX } from '@lucide/svelte';
     // *** Import Aether specific variables and functions
     import {
         ae_snip,
@@ -71,7 +51,6 @@
         slct_trigger,
         type key_val
     } from '$lib/stores/ae_stores';
-    import { User } from 'lucide-svelte';
     import { api } from '$lib/api/api';
 
     if (log_lvl) {