add web app favicon metadata

web/index.html

@@ -5,6 +5,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="theme-color" content="#f7f7f5" />
     <meta name="color-scheme" content="light dark" />
+    <meta name="application-name" content="Box Manifest" />
+    <meta name="description" content="A self-hosted hierarchical inventory." />
+    <link rel="icon" href="/favicon.svg" type="image/svg+xml" />
     <title>Box Manifest</title>
   </head>
   <body>

web/public/favicon.svg

@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+  <rect width="64" height="64" rx="14" fill="#30302d"/>
+  <path
+    d="M17 23 32 15l15 8v18L32 49l-15-8Zm0 0 15 8 15-8M32 31v18"
+    fill="none"
+    stroke="#fff"
+    stroke-linecap="round"
+    stroke-linejoin="round"
+    stroke-width="3"
+  />
+</svg>