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/client-form.tsx

@@ -224,7 +224,7 @@ export function ClientForm({ open, onOpenChange, client, onUseExistingClient }:
                 size="sm"
                 onClick={() => append({ channel: 'email', value: '', isPrimary: false })}
               >
-                <Plus className="mr-1 h-3.5 w-3.5" />
+                <Plus className="mr-1 h-3.5 w-3.5" aria-hidden />
                 Add Contact
               </Button>
             </div>
@@ -333,7 +333,7 @@ export function ClientForm({ open, onOpenChange, client, onUseExistingClient }:
                         className="h-8 text-destructive hover:text-destructive"
                         onClick={() => remove(index)}
                       >
-                        <Trash2 className="mr-1 h-3.5 w-3.5" />
+                        <Trash2 className="mr-1 h-3.5 w-3.5" aria-hidden />
                         Remove
                       </Button>
                     )}
@@ -419,7 +419,7 @@ export function ClientForm({ open, onOpenChange, client, onUseExistingClient }:
             </Button>
             <Button type="submit" disabled={isSubmitting || mutation.isPending}>
               {(isSubmitting || mutation.isPending) && (
-                <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                <Loader2 className="mr-2 h-4 w-4 animate-spin" aria-hidden />
               )}
               {isEdit ? 'Save changes' : 'Create Client'}
             </Button>