fix: react-doctor control-has-associated-label 137→? (auto aria-labels)

Add aria-label to buttons (icon-only, pagination, action) and inputs
(placeholder-derived) via balanced-brace JSX parser. Files with complex
onClick expressions (deep brace nesting) skipped to avoid breakage.

src/components/admin/MessageLogPanel.tsx

@@ -477,7 +477,7 @@ export default function MessageLogPanel({ brandId }: { brandId?: string }) {
                   onClick={() => setPage((p) => Math.max(1, p - 1))}
                   disabled={page === 1}
                   className="px-4 py-2 text-sm border border-stone-200 rounded-xl bg-white text-stone-700 hover:bg-stone-50 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
-                >
+                 aria-label="Previous">
                   Previous
                 </button>
                 {Array.from({ length: Math.min(5, totalPages) }, (_, i) => {
@@ -500,7 +500,7 @@ export default function MessageLogPanel({ brandId }: { brandId?: string }) {
                   onClick={() => setPage((p) => Math.min(totalPages, p + 1))}
                   disabled={page === totalPages}
                   className="px-4 py-2 text-sm border border-stone-200 rounded-xl bg-white text-stone-700 hover:bg-stone-50 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
-                >
+                 aria-label="Next">
                   Next
                 </button>
               </div>