fix: ended page scopes start no timers; SSH transfers keep their connection from the idle sweep; linked files download whole; only the sent item unpacks on an SSH host, replace and skip as on a machine

internal/server/web/static/wsutil.test.js

@@ -39,3 +39,13 @@ test('dropAction: other SSH user on the same host is another place', () => {
   const b = {kind: 'ssh', id: 'm1|bob@h:22', label: 'bob@h'};
   assert.strictEqual(U.dropAction({source: a, paths: ['/x'], dir: '/'}, {kind: 'term', source: b}).kind, 'deny');
 });
+
+test('scope: nothing new runs after it ended', async () => {
+  const s = U.scope();
+  let n = 0;
+  s.end();
+  s.timeout(() => n++, 1);
+  s.interval(() => n++, 1);
+  await new Promise(r => setTimeout(r, 20));
+  assert.strictEqual(n, 0);
+});