feat(lms): add Docker setup guidance and improve remote workspace handling

src/main/dockerStatus.test.ts

@@ -0,0 +1,19 @@
+import { strict as assert } from 'node:assert'
+import { test } from 'node:test'
+import { classifyDockerError } from './dockerStatus'
+
+test('missing CLI is distinguished from an unavailable daemon', () => {
+  assert.equal(classifyDockerError('ENOENT', 'spawn docker ENOENT'), 'missing')
+  assert.equal(classifyDockerError(1, 'Cannot connect to the Docker daemon'), 'unavailable')
+  assert.equal(classifyDockerError(1, 'dial unix /run/docker.sock: connect: connection refused'), 'unavailable')
+})
+
+test('permission errors take precedence over connection errors', () => {
+  assert.equal(classifyDockerError(1, 'Cannot connect: permission denied'), 'permission')
+  assert.equal(classifyDockerError('EACCES', 'spawn docker EACCES'), 'permission')
+})
+
+test('timeouts and unknown failures do not imply Docker needs installing', () => {
+  assert.equal(classifyDockerError(null, 'Command failed: docker info'), 'error')
+  assert.equal(classifyDockerError(1, 'context not found'), 'error')
+})