style: unify branding by using app icon in header and sidebar

Author: pavanpaik

web/public/logo.jpg

@@ -7,7 +7,7 @@ export default function Header() {
             <div className="max-w-7xl w-full flex items-center justify-between md:justify-end pointer-events-auto">
                 <Link href="/" className="flex items-center gap-2 md:hidden min-w-0 flex-shrink">
                     <img
-                        src="/logo.jpg"
+                        src="/app-icon.png"
                         alt="Sai Leela Rahasya"
                         className="h-8 w-auto object-contain flex-none"
                     />

web/src/components/layout/Header.tsx

@@ -34,7 +34,7 @@ export default function Sidebar() {
             <div className="h-16 flex items-center px-3 border-b border-gray-100">
                 <Link href="/" className="flex items-center gap-3">
                     <img
-                        src="/logo.jpg"
+                        src="/app-icon.png"
                         alt="Sai Leela Rahasya"
                         className="h-10 w-auto object-contain"
                     />