fix(audit-wave-10): aria-hidden sweep on decorative Lucide icons (#69)

Mechanical codemod added \`aria-hidden\` to 444 self-closing single-line
Lucide icon JSX elements across 267 .tsx files in:

- shared/, layout/, dashboard/
- admin/ (all sections)
- clients/, berths/, yachts/, companies/, interests/, documents/
- reminders/, reservations/, residential/, expenses/, email/

The regex targeted only the safe pattern \`<IconName className="..." />\`
(no other props, self-closing, capitalized component name). Every match
inspected is a decorative companion to visible text or sits inside a
button whose accessible name comes from \`aria-label\` / sr-only text
— the icon itself should not be announced.

Screen readers no longer double-read the icon + the adjacent label
text (e.g. "Pencil Pencil Edit" → just "Edit"). The existing
@axe-core/playwright smoke test (\`20-accessibility.spec.ts\`) continues
to pass.

Test suite stays at 1315/1315 vitest. typescript clean.

Closes task #69 (aria-hidden sweep) from the AUDIT-2026-05-12 follow-ups
backlog.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/layout/user-menu.tsx

@@ -91,7 +91,7 @@ export function UserMenu({ trigger, align = 'end', user, ports }: UserMenuProps)
                 regardless of how many ports the operator has access to. */}
             <DropdownMenuSub>
               <DropdownMenuSubTrigger>
-                <Building2 className="w-4 h-4 mr-2" />
+                <Building2 className="w-4 h-4 mr-2" aria-hidden />
                 Switch port
               </DropdownMenuSubTrigger>
               <DropdownMenuSubContent className="w-56">
@@ -116,31 +116,31 @@ export function UserMenu({ trigger, align = 'end', user, ports }: UserMenuProps)
 
         {/* eslint-disable-next-line @typescript-eslint/no-explicit-any */}
         <DropdownMenuItem onClick={() => router.push(`${base}/settings/profile` as any)}>
-          <User className="w-4 h-4 mr-2" />
+          <User className="w-4 h-4 mr-2" aria-hidden />
           Profile
         </DropdownMenuItem>
         {/* eslint-disable-next-line @typescript-eslint/no-explicit-any */}
         <DropdownMenuItem onClick={() => router.push(`${base}/settings` as any)}>
-          <Settings className="w-4 h-4 mr-2" />
+          <Settings className="w-4 h-4 mr-2" aria-hidden />
           Settings
         </DropdownMenuItem>
         <DropdownMenuItem
           // eslint-disable-next-line @typescript-eslint/no-explicit-any
           onClick={() => router.push(`${base}/settings#notifications` as any)}
         >
-          <Bell className="w-4 h-4 mr-2" />
+          <Bell className="w-4 h-4 mr-2" aria-hidden />
           Notification preferences
         </DropdownMenuItem>
         <DropdownMenuSeparator />
         <DropdownMenuItem onClick={handleToggleDarkMode}>
           {darkMode ? (
             <>
-              <Sun className="w-4 h-4 mr-2" />
+              <Sun className="w-4 h-4 mr-2" aria-hidden />
               Light Mode
             </>
           ) : (
             <>
-              <Moon className="w-4 h-4 mr-2" />
+              <Moon className="w-4 h-4 mr-2" aria-hidden />
               Dark Mode
             </>
           )}
@@ -150,7 +150,7 @@ export function UserMenu({ trigger, align = 'end', user, ports }: UserMenuProps)
           className="text-destructive focus:text-destructive"
           onClick={() => router.push('/api/auth/sign-out')}
         >
-          <LogOut className="w-4 h-4 mr-2" />
+          <LogOut className="w-4 h-4 mr-2" aria-hidden />
           Sign Out
         </DropdownMenuItem>
       </DropdownMenuContent>