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/admin-sections-browser.tsx

@@ -377,7 +377,10 @@ export function AdminSectionsBrowser({ portSlug }: AdminSectionsBrowserProps) {
   return (
     <div className="space-y-6">
       <div className="relative max-w-md">
-        <Search className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+        <Search
+          className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground"
+          aria-hidden
+        />
         <Input
           type="search"
           inputMode="search"
@@ -466,7 +469,10 @@ function SectionCard({
         )}
       >
         <CardHeader className="flex flex-row items-start gap-3 space-y-0 pb-2">
-          <Icon className="h-5 w-5 mt-0.5 text-muted-foreground group-hover:text-primary" />
+          <Icon
+            className="h-5 w-5 mt-0.5 text-muted-foreground group-hover:text-primary"
+            aria-hidden
+          />
           <div className="flex-1">
             <CardTitle className="text-base">{section.label}</CardTitle>
             {groupTitle ? (