add Danny Kotan, make web friend cards text-only 2x2 on phones

src/app/data.ts

@@ -23,7 +23,12 @@ export interface Friend {
   url: string;
   /** The live site: the window's `www` button and the status check use this. */
   realUrl: string;
-  img: string;
+  /**
+   * Desktop-icon avatar. Optional: the web theme's friends section is
+   * text-only (no SVG avatars), and a friend without one falls back to the
+   * generic glyph on the desktop.
+   */
+  img?: string;
   desc: string;
   /** Render in an iframe in a desktop window. */
   iframe: boolean;
@@ -266,6 +271,14 @@ export const friends: Friend[] = [
     desc: "vlcak.me",
     iframe: true,
   },
+  {
+    name: "Danny Koťan",
+    // No X-Frame-Options / frame-ancestors, so it frames directly.
+    url: "https://k0t4tkos-portfolio.com/",
+    realUrl: "https://k0t4tkos-portfolio.com/",
+    desc: "k0t4tkos-portfolio.com",
+    iframe: true,
+  },
 ];
 
 export const WALLPAPER = "/wallpaper.jpg";