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/companies/company-form.tsx

@@ -412,7 +412,7 @@ export function CompanyForm({ open, onOpenChange, company }: CompanyFormProps) {
                     size="sm"
                     onClick={() => setClientFormOpen(true)}
                   >
-                    <Plus className="mr-1 h-3.5 w-3.5" /> New client
+                    <Plus className="mr-1 h-3.5 w-3.5" aria-hidden /> New client
                   </Button>
                   <Button
                     type="button"
@@ -420,7 +420,7 @@ export function CompanyForm({ open, onOpenChange, company }: CompanyFormProps) {
                     size="sm"
                     onClick={() => setYachtFormOpen(true)}
                   >
-                    <Plus className="mr-1 h-3.5 w-3.5" /> New yacht
+                    <Plus className="mr-1 h-3.5 w-3.5" aria-hidden /> New yacht
                   </Button>
                 </div>
               </div>
@@ -459,7 +459,7 @@ export function CompanyForm({ open, onOpenChange, company }: CompanyFormProps) {
             </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 Company'}
             </Button>
@@ -669,7 +669,7 @@ function EntityMultiPicker({
             )}
           >
             {placeholder}
-            <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+            <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" aria-hidden />
           </Button>
         </PopoverTrigger>
         <PopoverContent className="w-(--radix-popper-anchor-width) min-w-[280px] p-0" align="start">