feat: replace logo with official Axil Accountants brand mark

Swaps logo-axil.png for logo-axil.jpg (official logo with blue A
lettermark, green bar chart icon and AXIL ACCOUNTANTS wordmark).
Updates Header and Footer references accordingly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/layout/Footer.tsx

@@ -66,7 +66,7 @@ export function Footer() {
           <div className="col-span-2 sm:col-span-1">
             <div className="mb-5">
               <Image
-                src="/logo-axil.png"
+                src="/logo-axil.jpg"
                 alt="Axil Accountants"
                 width={140}
                 height={97}

src/components/layout/Header.tsx

@@ -45,7 +45,7 @@ const DOCK_ITEMS = [
 function AxilLogo({ className }: { className?: string }) {
   return (
     <Image
-      src="/logo-axil.png"
+      src="/logo-axil.jpg"
       alt="Axil Accounting"
       width={140}
       height={97}