fix: globe clickable after tab switch — deferred init with ResizeObserver

Globe.gl needs non-zero container dimensions for initialization and click
handling. With the tab persistence fix (display:none for hidden tabs), the
globe container starts at 0×0 when radio isn't the first tab. Added a
separate ResizeObserver that detects when the container becomes visible
and triggers globe initialization via containerVisible state dependency.

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

web/src/App.tsx

@@ -123,15 +123,20 @@ export default function App() {
             <p>Plugins werden im Server konfiguriert.</p>
           </div>
         ) : (
-          /* Render ALL tabs, hide inactive ones with CSS to preserve state */
+          /* Render ALL tabs, hide inactive ones to preserve state.
+             Active tab gets full dimensions; hidden tabs stay in DOM but invisible. */
           plugins.map(p => {
             const Comp = tabComponents[p.name];
             if (!Comp) return null;
+            const isActive = activeTab === p.name;
             return (
               <div
                 key={p.name}
-                className="hub-tab-panel"
-                style={{ display: activeTab === p.name ? 'contents' : 'none' }}
+                className={`hub-tab-panel ${isActive ? 'active' : ''}`}
+                style={isActive
+                  ? { display: 'flex', flexDirection: 'column', width: '100%', height: '100%' }
+                  : { display: 'none' }
+                }
               >
                 <Comp data={pluginData[p.name] || {}} />
               </div>

web/src/plugins/radio/RadioTab.tsx

@@ -89,6 +89,7 @@ export default function RadioTab({ data }: { data: any }) {
   const [volume, setVolume] = useState(0.5);
   const [voiceStats, setVoiceStats] = useState<VoiceStats | null>(null);
   const [showConnModal, setShowConnModal] = useState(false);
+  const [containerVisible, setContainerVisible] = useState(false);
   const searchTimeout = useRef<ReturnType<typeof setTimeout>>(undefined);
   const volumeTimeout = useRef<ReturnType<typeof setTimeout>>(undefined);
   const selectedGuildRef = useRef(selectedGuild);
@@ -211,15 +212,47 @@ export default function RadioTab({ data }: { data: any }) {
       .catch(() => setStationsLoading(false));
   };
 
+  // ── Watch container visibility (detects tab becoming active) ──
+  useEffect(() => {
+    const el = containerRef.current;
+    if (!el) return;
+
+    // Check immediately
+    if (el.clientWidth > 0 && el.clientHeight > 0) {
+      setContainerVisible(true);
+    }
+
+    const observer = new ResizeObserver((entries) => {
+      for (const entry of entries) {
+        const { width, height } = entry.contentRect;
+        if (width > 0 && height > 0) {
+          setContainerVisible(true);
+        }
+      }
+    });
+    observer.observe(el);
+
+    return () => observer.disconnect();
+  }, []);
+
   // ── Initialize globe ──
   useEffect(() => {
     if (!containerRef.current || places.length === 0) return;
 
+    // If container is hidden (display:none), wait for it to become visible
+    const cw = containerRef.current.clientWidth;
+    const ch = containerRef.current.clientHeight;
+
     if (globeRef.current) {
       globeRef.current.pointsData(places);
+      // Re-apply dimensions in case we were hidden during init
+      if (cw > 0 && ch > 0) globeRef.current.width(cw).height(ch);
       return;
     }
 
+    // Don't initialize globe with zero dimensions — containerVisible will re-trigger
+    if (cw === 0 || ch === 0) return;
+
     // Read accent color from theme
     const initStyle = getComputedStyle(containerRef.current.parentElement!);
     const initRgb = initStyle.getPropertyValue('--accent-rgb').trim() || '230, 126, 34';
@@ -286,21 +319,28 @@ export default function RadioTab({ data }: { data: any }) {
 
     const onResize = () => {
       if (containerRef.current && globeRef.current) {
-        globeRef.current
-          .width(containerRef.current.clientWidth)
-          .height(containerRef.current.clientHeight);
+        const w = containerRef.current.clientWidth;
+        const h = containerRef.current.clientHeight;
+        if (w > 0 && h > 0) {
+          globeRef.current.width(w).height(h);
+        }
       }
     };
     window.addEventListener('resize', onResize);
 
+    // ResizeObserver: detects when tab becomes visible (0×0 → real size)
+    const resizeObserver = new ResizeObserver(() => onResize());
+    resizeObserver.observe(el);
+
     return () => {
       controls.removeEventListener('change', onControlsChange);
       el.removeEventListener('mousedown', onInteract);
       el.removeEventListener('touchstart', onInteract);
       el.removeEventListener('wheel', onInteract);
       window.removeEventListener('resize', onResize);
+      resizeObserver.disconnect();
     };
-  }, [places, pauseRotation]);
+  }, [places, pauseRotation, containerVisible]);
 
   // ── Play handler ──
   const handlePlay = useCallback(async (