feat(editor): F4.6d the web browser and web server on a computer's desktop

The oracle BrowserWindowRun uses Java's browser and web server windows as a
person does; the room keeps a browser window per computer and sends a
program window's view, the start names the person's language. The editor
shows the page in a sandboxed frame, links and forms go to the room, the web
server has its button, virtual hosts and lines. Better than Java: relative
images and links count from the page's folder, a mark stays in the page, the
error page from Java's template, the virtual hosts' file with complete rows.

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

packages/editor/test/serverLines.test.ts

@@ -0,0 +1,41 @@
+// A server's lines as Java's web server window wrote them
+// (packages/sim/test/browserWindow.java.json, BrowserWindowRun): each kind
+// the window got there, in Java's words.
+
+import { readFileSync } from 'node:fs';
+import { dirname, join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { describe, expect, it } from 'vitest';
+import type { ServerLogEntry } from '@mdg-filius/core';
+import { serverLine } from '../src/desktop/serverLines.js';
+import { translate } from '../src/i18n/i18n.js';
+
+const java = JSON.parse(readFileSync(join(dirname(fileURLToPath(import.meta.url)), '../../sim/test/browserWindow.java.json'), 'utf8')) as { steps: { step: string; log?: string }[] };
+const log = java.steps.find((step) => step.step === 'server:stop')!.log!;
+const t = (key: string, values?: Readonly<Record<string, string | number>>) => translate('de', key, values);
+
+describe("a server's lines", () => {
+  it("are Java's, line by line", () => {
+    const [, address, port] = /Verbindung zu ([\d.]+):(\d+) hergestellt/.exec(log)!;
+    const request = 'POST /ziel.html HTTP/1.1\nHost: www.filius.de\n\nname=Fil+ius&c=1&s=y&t=%C3%BC%26%3D&ok=Gut';
+    const answer = 'HTTP/1.1 200 OK\nContent-type: text/html\n\n<html><head><title>Ziel</title></head><body>Ziel</body></html>';
+    const entries: ServerLogEntry[] = [
+      { kind: 'acceptingStarted' },
+      { kind: 'connectionAccepted', address: address!, port: Number(port) },
+      { kind: 'received', text: request },
+      { kind: 'sent', text: answer },
+      { kind: 'connectionClosed', address: address!, port: Number(port) },
+      { kind: 'acceptingStopped' },
+      { kind: 'serverSocketClosed' },
+    ];
+    for (const entry of entries) expect(log, entry.kind).toContain(`${serverLine(entry, t)}\n`);
+    expect(log.startsWith(`${serverLine({ kind: 'acceptingStarted' }, t)}\n`)).toBe(true);
+  });
+
+  it('name a failed send and a port that is taken', () => {
+    expect(serverLine({ kind: 'sendFailed', failure: 'timedOut' }, t)).toBe('Zeitüberschreitung während des Versands einer Nachricht');
+    expect(serverLine({ kind: 'sendFailed', failure: 'notConnected' }, (key) => translate('en', key))).toBe('Connection could not be established!');
+    expect(serverLine({ kind: 'serverSocketFailed' }, t)).toBe('Server-Socket konnte nicht geöffnet werden.');
+    expect(serverLine({ kind: 'connectionAccepted', address: '1.2.3.4', port: 5 }, (key, values) => translate('en', key, values))).toBe('Connection to 1.2.3.4:5 established');
+  });
+});