feat(editor): F4.6a simulation mode and a computer's desktop

Java's mode buttons start and stop the room, now in a worker of the
editor's page (LocalSimHost), with Java's speed slider. While the
simulation runs the design is locked as in Java: no palette, no sheet,
nothing moves, no undo. Cables that carry a frame light up in Java's
green, and a tap on a computer opens its desktop: Java's title, the
software installation first, then the installed programs in the order
of Java's list for the language, a taskbar with the network icon and
the network as the simulation runs it. The room sends that over a new
topic, node:<id>. Desktops stay over a return to the design and show
again at the next start. The programs' windows follow from F4.6b.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/editor/src/main.tsx

@@ -7,7 +7,7 @@
 import { StrictMode, useEffect, useState } from 'react';
 import { createRoot } from 'react-dom/client';
 import * as Y from 'yjs';
-import { deviceSheet, emptyProject, topologyView, writeProject } from '@mdg-filius/doc';
+import { desktopView, deviceSheet, emptyProject, topologyView, writeProject } from '@mdg-filius/doc';
 import { openProjectArchive } from '@mdg-filius/fls';
 import { startBridge } from './bridge/dashboardBridge.js';
 import { Editor } from './Editor.js';
@@ -62,7 +62,7 @@ function App() {
 
   // The development page lets its browser tests read the document's drawing (never the editor embedded in the dashboard).
   useEffect(() => {
-    (window as unknown as { filiusDev?: unknown }).filiusDev = doc === null ? undefined : { view: () => topologyView(doc), sheet: (id: string) => deviceSheet(doc, id) };
+    (window as unknown as { filiusDev?: unknown }).filiusDev = doc === null ? undefined : { view: () => topologyView(doc), sheet: (id: string) => deviceSheet(doc, id), desktop: (id: string) => desktopView(doc, id) };
   }, [doc]);
 
   const t = (key: string) => translate(language, key);