feat: add authenticated settings page.

shadcn-admin/public/images/favicon.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svgjs="http://svgjs.com/svgjs" width="24" height="24"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokewidth="2" strokelinecap="round" strokelinejoin="round">
+  <path d="M15 6v12a3 3 0 1 0 3-3H6a3 3 0 1 0 3 3V6a3 3 0 1 0-3 3h12a3 3 0 1 0-3-3"></path>
+</svg><style>@media (prefers-color-scheme: light) { :root { filter: contrast(1) brightness(0.8); } }
+</style></svg>

shadcn-admin/public/images/favicon_light.svg

@@ -0,0 +1 @@
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="24" height="24" viewBox="948,463.5,24,24"><defs><clipPath id="clip-1"><rect x="948" y="463.5" width="24" height="24" id="clip-1" stroke="none"/></clipPath></defs><g fill="none" fill-rule="nonzero" stroke="none" stroke-width="1" stroke-linecap="butt" stroke-linejoin="miter" stroke-miterlimit="10" stroke-dasharray="" stroke-dashoffset="0" font-family="none" font-weight="none" font-size="none" text-anchor="none" style="mix-blend-mode: normal"><g><g id="Group 1"><g clip-path="url(#clip-1)" id="Group 1"><path d="M963,469.5v12c0,1.65685 1.34315,3 3,3c1.65685,0 3,-1.34315 3,-3c0,-1.65685 -1.34315,-3 -3,-3h-12c-1.65685,0 -3,1.34315 -3,3c0,1.65685 1.34315,3 3,3c1.65685,0 3,-1.34315 3,-3v-12c0,-1.65685 -1.34315,-3 -3,-3c-1.65685,0 -3,1.34315 -3,3c0,1.65685 1.34315,3 3,3h12c1.65685,0 3,-1.34315 3,-3c0,-1.65685 -1.34315,-3 -3,-3c-1.65685,0 -3,1.34315 -3,3" id="Path 1" stroke="#f2f2f2"/></g></g></g></g></svg>