fix: restore update command helpers (#1857)

Exported package-manager helpers used by openchamber update
Added regression coverage for the update-available path

packages/web/server/lib/package-manager.js

@@ -483,7 +483,7 @@ export function detectPackageManagerDetails() {
   };
 }
 
-function detectPackageManager() {
+export function detectPackageManager() {
   return detectPackageManagerDetails().packageManager;
 }
 
@@ -769,7 +769,7 @@ export async function checkForUpdates(options = {}) {
 /**
  * Execute the update (used by CLI)
  */
-function executeUpdate(pm = detectPackageManager(), options = {}) {
+export function executeUpdate(pm = detectPackageManager(), options = {}) {
   const command = getUpdateCommand(pm);
   if (!options?.silent) {
     console.log(`Updating ${PACKAGE_NAME} using ${pm}...`);

packages/web/server/lib/package-manager.test.js

@@ -6,7 +6,12 @@ vi.mock('node:child_process', () => ({
   spawnSync: vi.fn(() => ({ status: 0, stdout: '/usr/local/bin', stderr: '' })),
 }));
 
-const { checkForUpdates, getCurrentVersion } = await import('./package-manager.js');
+const {
+  checkForUpdates,
+  detectPackageManager,
+  executeUpdate,
+  getCurrentVersion,
+} = await import('./package-manager.js');
 
 /** Helper: create a fetch mock that routes by URL pattern */
 function createFetchMock() {
@@ -251,3 +256,10 @@ describe('getCurrentVersion', () => {
     expect(getCurrentVersion()).toMatch(/^\d+\.\d+\.\d+|unknown$/);
   });
 });
+
+describe('CLI update exports', () => {
+  it('exports package-manager helpers used by the update command', () => {
+    expect(typeof detectPackageManager).toBe('function');
+    expect(typeof executeUpdate).toBe('function');
+  });
+});