Rail: proper folder icon for Files (inline SVG, matches the monochrome glyphs)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

web/src/Shell.tsx

@@ -12,6 +12,13 @@ import Files from './Files'
 import Power from './Power'
 import { Btn, NetBar, Toasts, toast } from './ui'
 
+// Inline outline icon so it matches the monochrome glyphs in the rail (emoji would be full colour).
+const FolderIcon = (
+  <svg viewBox="0 0 16 16" width="14" height="14" fill="none" stroke="currentColor" strokeWidth="1.6" strokeLinejoin="round" aria-hidden="true">
+    <path d="M1.5 4a1 1 0 0 1 1-1h3.2l1.6 1.6h6.2a1 1 0 0 1 1 1V12a1 1 0 0 1-1 1h-11a1 1 0 0 1-1-1V4z" />
+  </svg>
+)
+
 const GROUPS: Group[] = [
   { id: 'dashboard', label: 'Dashboard', icon: '◔', page: true },
   { id: 'terminal', label: 'Terminal', icon: '>_' },
@@ -19,7 +26,7 @@ const GROUPS: Group[] = [
   { id: 'cron', label: 'Cron', icon: '⏱', page: true },
   { id: 'updates', label: 'Updates', icon: '⇪', page: true },
   { id: 'disks', label: 'Disks', icon: '▤', page: true },
-  { id: 'files', label: 'Files', icon: '▧', page: true },
+  { id: 'files', label: 'Files', icon: FolderIcon, page: true },
 ]
 
 type View = 'terminal' | 'dashboard' | 'services' | 'cron' | 'updates' | 'disks' | 'files'