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/admin/users/user-list.tsx

@@ -130,7 +130,7 @@ export function UserList() {
               onClick={() => handleEditUser(row.original)}
               title="Edit user"
             >
-              <Pencil className="h-4 w-4" />
+              <Pencil className="h-4 w-4" aria-hidden />
               <span className="sr-only">Edit</span>
             </Button>
           </PermissionGate>
@@ -149,9 +149,9 @@ export function UserList() {
                   }
                 >
                   {row.original.isActive ? (
-                    <PowerOff className="h-4 w-4" />
+                    <PowerOff className="h-4 w-4" aria-hidden />
                   ) : (
-                    <Power className="h-4 w-4" />
+                    <Power className="h-4 w-4" aria-hidden />
                   )}
                   <span className="sr-only">{row.original.isActive ? 'Disable' : 'Enable'}</span>
                 </Button>
@@ -176,7 +176,7 @@ export function UserList() {
                   title="Remove from port"
                   className="text-destructive hover:text-destructive"
                 >
-                  <Trash2 className="h-4 w-4" />
+                  <Trash2 className="h-4 w-4" aria-hidden />
                   <span className="sr-only">Remove</span>
                 </Button>
               }
@@ -201,7 +201,7 @@ export function UserList() {
         description="Manage users and their roles for this port"
         actions={
           <Button onClick={handleNewUser}>
-            <Plus className="mr-1.5 h-4 w-4" />
+            <Plus className="mr-1.5 h-4 w-4" aria-hidden />
             New User
           </Button>
         }