Implemented epics read/write

web/src/App.tsx

@@ -3,10 +3,14 @@ import { useState, useEffect } from 'preact/hooks';
 import { wsClient } from './lib/ws';
 import ViewMode from './ViewMode';
 import EditMode from './EditMode';
+import FullscreenMode from './FullscreenMode';
 import type { Interface } from './lib/types';
 
 type AppMode = 'view' | 'edit';
 
+// If URL has ?fs=<id>, render bare fullscreen canvas
+const fsParam = new URLSearchParams(window.location.search).get('fs');
+
 export default function App() {
   const [mode, setMode] = useState<AppMode>('view');
   const [wsStatus, setWsStatus] = useState('connecting');
@@ -20,9 +24,13 @@ export default function App() {
   useEffect(() => {
     const dpr = window.devicePixelRatio ?? 1;
     document.documentElement.style.setProperty('--dpr', String(dpr));
-    wsClient.connect('/ws');
+    if (!fsParam) wsClient.connect('/ws');
   }, []);
 
+  if (fsParam) {
+    return <FullscreenMode interfaceId={fsParam} />;
+  }
+
   function enterEdit(iface?: Interface) {
     setEditTarget(iface ?? null);
     setMode('edit');