test(docker): cover docker subcommand rendering paths

- add handler-level coverage for up, down, logs, config, update, and status

- exercise success, validation, follow-mode, and boxed error output paths

tests/unit/commands/docker-config-subcommand.test.ts

@@ -0,0 +1,75 @@
+import { describe, expect, it } from 'bun:test';
+import {
+  renderCapturedLines,
+  useDockerSubcommandConsoleCapture,
+} from './docker-subcommand-test-helpers';
+
+const capture = useDockerSubcommandConsoleCapture();
+
+async function loadHandleConfig() {
+  const mod = await import(
+    `../../../src/commands/docker/config-subcommand?test=${Date.now()}-${Math.random()}`
+  );
+  return mod.handleConfig;
+}
+
+describe('docker config subcommand', () => {
+  it('prints the derived Docker configuration table', async () => {
+    const dockerModule = (await import(
+      '../../../src/docker'
+    )) as typeof import('../../../src/docker');
+    const originalGetConfig = dockerModule.DockerExecutor.prototype.getConfig;
+    dockerModule.DockerExecutor.prototype.getConfig = function () {
+      return {
+        host: 'docker-box',
+        remote: true,
+        ccsDir: '/tmp/.ccs',
+        dockerDir: '/tmp/docker',
+        composeFile: '/tmp/docker/docker-compose.integrated.yml',
+        dockerfile: '/tmp/docker/Dockerfile.integrated',
+        supervisordConfig: '/tmp/docker/supervisord.conf',
+        entrypoint: '/tmp/docker/entrypoint-integrated.sh',
+        remoteDeployDir: '~/.ccs/docker',
+        composeService: 'ccs-cliproxy',
+        containerName: 'ccs-cliproxy',
+        dashboardPort: 3000,
+        proxyPort: 8317,
+      };
+    };
+
+    try {
+      const handleConfig = await loadHandleConfig();
+      await handleConfig(['--host', 'docker-box']);
+
+      const rendered = renderCapturedLines(capture.logLines);
+      expect(rendered).toContain('remote (docker-box)');
+      expect(rendered).toContain('/tmp/docker/docker-compose.integrated.yml');
+      expect(rendered).toContain('ccs-cliproxy');
+      expect(capture.errorLines).toEqual([]);
+      expect(process.exitCode).toBe(0);
+    } finally {
+      dockerModule.DockerExecutor.prototype.getConfig = originalGetConfig;
+    }
+  });
+
+  it('renders thrown config errors as boxed failures', async () => {
+    const dockerModule = (await import(
+      '../../../src/docker'
+    )) as typeof import('../../../src/docker');
+    const originalGetConfig = dockerModule.DockerExecutor.prototype.getConfig;
+    dockerModule.DockerExecutor.prototype.getConfig = function () {
+      throw new Error('Missing bundled Docker asset: /tmp/docker/Dockerfile.integrated');
+    };
+
+    try {
+      const handleConfig = await loadHandleConfig();
+      await handleConfig([]);
+
+      const rendered = renderCapturedLines(capture.errorLines);
+      expect(rendered).toContain('Missing bundled Docker asset');
+      expect(process.exitCode).toBe(1);
+    } finally {
+      dockerModule.DockerExecutor.prototype.getConfig = originalGetConfig;
+    }
+  });
+});