Add Radio Browser station importer

public/images/radio-placeholder.svg

@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 96 96" role="img" aria-labelledby="title desc">
+  <title id="title">Radio placeholder</title>
+  <desc id="desc">Fallback icon for stations without a logo.</desc>
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0%" stop-color="#203343"/>
+      <stop offset="100%" stop-color="#10141b"/>
+    </linearGradient>
+    <linearGradient id="accent" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0%" stop-color="#4dd7c8"/>
+      <stop offset="100%" stop-color="#8fb3ff"/>
+    </linearGradient>
+  </defs>
+  <rect width="96" height="96" rx="24" fill="url(#bg)"/>
+  <rect x="17" y="20" width="62" height="56" rx="14" fill="none" stroke="url(#accent)" stroke-width="5"/>
+  <circle cx="36" cy="48" r="8" fill="url(#accent)"/>
+  <path d="M50 39h12M50 48h12M50 57h8" stroke="#f7f8fb" stroke-width="5" stroke-linecap="round"/>
+  <path d="M27 80c7-7 14-10 21-10s14 3 21 10" fill="none" stroke="#ffb45c" stroke-width="5" stroke-linecap="round"/>
+</svg>