fix: resolve dev panel and CLI regressions

Synchronize scheduler concurrency across API and gRPC processes and restore persisted limits during recovery.

Serialize subscription mutations and preserve shared storage while cleaning Shell and CLI namespaces, historical references, and filesystem-specific naming candidates.

Handle CLI text responses correctly and include script history in backups. Add regression coverage for concurrency, cleanup ownership, long URLs, Unicode paths, and history exports.

cli/src/remote/commands/open.ts

@@ -241,7 +241,7 @@ export async function openCommand(
     body,
     authenticated: !op.anonymous,
     output: values.output as string | undefined,
-    text: op.path === 'system/log',
+    text: ['system/log', 'system/config/node-mirror'].includes(op.path),
     timeoutMs: values.timeout ? Number(values.timeout) * 1000 : undefined,
   });
   const data =

cli/test/remote/openapi.test.cjs

@@ -211,3 +211,29 @@ test('owner two-factor challenge remains actionable without exposing server mess
   assert.equal(result.code, 3); assert.match(result.err, /two-factor-login/); assert.doesNotMatch(result.err, /SERVER-SECRET/);
   assert.equal(f.requests.length, 1); assert.equal(f.requests[0].headers.authorization, undefined);
 });
+
+test('node mirror configuration accepts the real empty response for named and raw API commands', async t => {
+  const f = await fixture(t);
+  f.reply((_req, res) => { res.writeHead(200, { 'content-type': 'application/octet-stream' }); res.end(); });
+  for (const args of [
+    ['system', 'config-node-mirror'],
+    ['api', 'request', 'PUT', '/open/system/config/node-mirror'],
+  ]) {
+    const reply = success(await f.run([...args, '--data', '{"nodeMirror":"https://registry.npmmirror.com"}']));
+    assert.equal(reply.code, 200);
+    assert.equal(f.requests.at(-1).method, 'PUT');
+    assert.equal(f.requests.at(-1).url, '/panel/open/system/config/node-mirror');
+  }
+  assert.equal(f.requests.length, 2, 'configuration writes must not be retried');
+});
+
+test('empty node mirror responses still reject authentication and server failures without retries', async t => {
+  const f = await fixture(t);
+  for (const status of [401, 403, 500]) {
+    f.reply((_req, res) => { res.writeHead(status, { 'content-type': 'application/octet-stream' }); res.end(); });
+    const result = await f.run(['system', 'config-node-mirror', '--data', '{}']);
+    assert.notEqual(result.code, 0);
+    assert.equal(result.out, '');
+  }
+  assert.equal(f.requests.length, 3);
+});