fix(help): align cliproxy status and provider filter docs

- replace incorrect root help command example for provider-filtered status

- add parity regression test for cliproxy quota provider guidance

tests/unit/commands/help-command-parity.test.ts

@@ -0,0 +1,29 @@
+import { afterEach, describe, expect, test } from 'bun:test';
+
+import { handleHelpCommand } from '../../../src/commands/help-command';
+
+function stripAnsi(input: string): string {
+  return input.replace(/\u001b\[[0-9;]*m/g, '');
+}
+
+describe('help command parity', () => {
+  const originalLog = console.log;
+
+  afterEach(() => {
+    console.log = originalLog;
+  });
+
+  test('root help documents cliproxy provider filter under quota command', async () => {
+    const lines: string[] = [];
+    console.log = (...args: unknown[]) => {
+      lines.push(args.map((arg) => String(arg)).join(' '));
+    };
+
+    await handleHelpCommand();
+
+    const rendered = stripAnsi(lines.join('\n'));
+    expect(rendered.includes('ccs cliproxy status [provider]')).toBe(false);
+    expect(rendered.includes('ccs cliproxy status')).toBe(true);
+    expect(rendered.includes('ccs cliproxy quota --provider <name>')).toBe(true);
+  });
+});