feat(cli): include git sha in --version

tests/version.test.ts

@@ -1,12 +1,30 @@
 import { readFileSync } from 'node:fs';
 import { fileURLToPath } from 'node:url';
-import { describe, expect, it } from 'vitest';
-import { getCliVersion } from '../src/lib/version.js';
+import { afterEach, describe, expect, it } from 'vitest';
+import { formatVersionLine, resolveGitSha, resolvePackageVersion } from '../src/lib/version.js';
 
 describe('getCliVersion', () => {
-  it('matches package.json version when available', () => {
+  afterEach(() => {
+    delete process.env.BIRD_VERSION;
+    delete process.env.BIRD_GIT_SHA;
+  });
+
+  it('reads package.json version when available', () => {
     const raw = readFileSync(fileURLToPath(new URL('../package.json', import.meta.url)), 'utf8');
     const pkg = JSON.parse(raw) as { version?: unknown };
-    expect(getCliVersion()).toBe(pkg.version);
+    expect(resolvePackageVersion()).toBe(pkg.version);
+  });
+
+  it('formats injected version + sha', () => {
+    process.env.BIRD_VERSION = '9.9.9';
+    process.env.BIRD_GIT_SHA = 'abcdef123456';
+    expect(formatVersionLine('not a url')).toBe('9.9.9 (abcdef12)');
+  });
+
+  it('adds git sha when available', () => {
+    const version = resolvePackageVersion();
+    const sha = resolveGitSha();
+    expect(sha).toMatch(/^[0-9a-f]{8}$/);
+    expect(formatVersionLine()).toBe(`${version} (${sha})`);
   });
 });