test: add formatItem unit tests to maintain coverage

Export formatItem helper and add 3 unit tests covering same-line
formatting, line-wrapping for long terms, and no-description output.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Mossaka

src/cli.test.ts

@@ -1,5 +1,5 @@
 import { Command } from 'commander';
-import { parseEnvironmentVariables, parseDomains, parseDomainsFile, escapeShellArg, joinShellArgs, parseVolumeMounts, isValidIPv4, isValidIPv6, parseDnsServers, validateAgentImage, isAgentImagePreset, AGENT_IMAGE_PRESETS, processAgentImageOption, processLocalhostKeyword, validateSkipPullWithBuildLocal, validateAllowHostPorts, validateFormat, validateApiProxyConfig, buildRateLimitConfig, validateRateLimitFlags } from './cli';
+import { parseEnvironmentVariables, parseDomains, parseDomainsFile, escapeShellArg, joinShellArgs, parseVolumeMounts, isValidIPv4, isValidIPv6, parseDnsServers, validateAgentImage, isAgentImagePreset, AGENT_IMAGE_PRESETS, processAgentImageOption, processLocalhostKeyword, validateSkipPullWithBuildLocal, validateAllowHostPorts, validateFormat, validateApiProxyConfig, buildRateLimitConfig, validateRateLimitFlags, formatItem } from './cli';
 import { redactSecrets } from './redact-secrets';
 import * as fs from 'fs';
 import * as path from 'path';
@@ -1539,4 +1539,23 @@ describe('cli', () => {
       expect(result.error).toBeUndefined();
     });
   });
+
+  describe('formatItem', () => {
+    it('should format item with description on same line when term fits', () => {
+      const result = formatItem('-v', 'verbose output', 20, 2, 2, 80);
+      expect(result).toBe('  -v                    verbose output');
+    });
+
+    it('should format item with description on next line when term is long', () => {
+      const result = formatItem('--very-long-option-name-here', 'desc', 10, 2, 2, 80);
+      expect(result).toContain('--very-long-option-name-here');
+      expect(result).toContain('\n');
+      expect(result).toContain('desc');
+    });
+
+    it('should format item without description', () => {
+      const result = formatItem('--flag', '', 20, 2, 2, 80);
+      expect(result).toBe('  --flag');
+    });
+  });
 });

src/cli.ts

@@ -677,7 +677,7 @@ export function parseVolumeMounts(mounts: string[]): ParseVolumeMountsResult | P
   return { success: true, mounts: result };
 }
 
-function formatItem(
+export function formatItem(
   term: string,
   description: string,
   termWidth: number,