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/clients/gdpr-export-button.tsx

@@ -111,7 +111,7 @@ export function GdprExportButton({ clientId }: { clientId: string }) {
     <Dialog open={open} onOpenChange={setOpen}>
       <DialogTrigger asChild>
         <Button variant="outline" size="sm" className="h-8">
-          <FileDown className="mr-1.5 h-3.5 w-3.5" />
+          <FileDown className="mr-1.5 h-3.5 w-3.5" aria-hidden />
           GDPR export
         </Button>
       </DialogTrigger>
@@ -154,9 +154,9 @@ export function GdprExportButton({ clientId }: { clientId: string }) {
 
           <Button onClick={() => request.mutate()} disabled={request.isPending}>
             {request.isPending ? (
-              <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" />
+              <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
             ) : (
-              <FileDown className="mr-1.5 h-3.5 w-3.5" />
+              <FileDown className="mr-1.5 h-3.5 w-3.5" aria-hidden />
             )}
             Queue export
           </Button>
@@ -180,7 +180,7 @@ export function GdprExportButton({ clientId }: { clientId: string }) {
                       </div>
                       {r.sentTo ? (
                         <div className="text-xs text-muted-foreground inline-flex items-center gap-1">
-                          <Mail className="h-3 w-3" />
+                          <Mail className="h-3 w-3" aria-hidden />
                           Sent to {r.sentTo}
                         </div>
                       ) : null}
@@ -195,7 +195,7 @@ export function GdprExportButton({ clientId }: { clientId: string }) {
                         size="sm"
                         onClick={() => downloadById(r.id)}
                       >
-                        <Download className="h-3.5 w-3.5" />
+                        <Download className="h-3.5 w-3.5" aria-hidden />
                       </Button>
                     ) : null}
                   </li>