feat: Radio Plugin – 3D Globe mit weltweiten Radiosendern

- Radio Garden API Client (30K+ Orte, Sender-Suche, Stream-URL Auflösung)
- Discord Voice Streaming via ffmpeg (PCM Pipeline)
- Interactive 3D Globe (globe.gl) mit allen Radiosender-Standorten
- Sender-Panel mit Play/Stop/Favoriten
- Live-Suche nach Sendern und Städten
- Now-Playing Bar mit Equalizer-Animation
- Guild/Voice-Channel Auswahl
- SSE Broadcasting für Live-Updates
- Favoriten-System mit Persistenz
- Responsive Design (Mobile/Tablet/Desktop)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/App.tsx

@@ -1,4 +1,5 @@
 import { useState, useEffect, useRef } from 'react';
+import RadioTab from './plugins/radio/RadioTab';
 
 interface PluginInfo {
   name: string;
@@ -6,8 +7,10 @@ interface PluginInfo {
   description: string;
 }
 
-// Plugin tab components will be registered here
-const tabComponents: Record<string, React.FC<{ data: any }>> = {};
+// Plugin tab components
+const tabComponents: Record<string, React.FC<{ data: any }>> = {
+  radio: RadioTab,
+};
 
 export function registerTab(pluginName: string, component: React.FC<{ data: any }>) {
   tabComponents[pluginName] = component;
@@ -72,6 +75,7 @@ export default function App() {
 
   // Tab icon mapping
   const tabIcons: Record<string, string> = {
+    radio: '\u{1F30D}',
     soundboard: '\u{1F3B5}',
     stats: '\u{1F4CA}',
     events: '\u{1F4C5}',