Fix empty project name prompt crash

.changeset/project-name-undefined-input.md

@@ -0,0 +1,5 @@
+---
+"@tanstack/cli": patch
+---
+
+Handle empty interactive project name input without crashing.

packages/cli/src/ui-prompts.ts

@@ -84,7 +84,7 @@ export async function getProjectName(): Promise<string> {
     process.exit(0)
   }
 
-  return value.trim()
+  return value?.trim() ?? ''
 }
 
 export async function selectPackageManager(): Promise<PackageManager> {

packages/cli/src/utils.ts

@@ -26,8 +26,8 @@ export function getCurrentDirectoryPackageName(): string {
   return getDirectoryPackageName(process.cwd())
 }
 
-export function isCurrentDirectoryProjectNameInput(name: string): boolean {
-  const normalized = name.trim()
+export function isCurrentDirectoryProjectNameInput(name?: string): boolean {
+  const normalized = name?.trim() ?? ''
   return normalized === '' || normalized === '.'
 }
 

packages/cli/tests/ui-prompts.test.ts

@@ -48,6 +48,15 @@ describe('getProjectName', () => {
     expect(textOptions.validate?.('.')).toBeUndefined()
   })
 
+  it('should treat undefined text input as the current directory', async () => {
+    vi.spyOn(clack, 'text').mockImplementation(async () => undefined)
+    vi.spyOn(clack, 'isCancel').mockImplementation(() => false)
+
+    const projectName = await getProjectName()
+
+    expect(projectName).toBe('')
+  })
+
   it('should exit on cancel', async () => {
     vi.spyOn(clack, 'text').mockImplementation(async () => 'Cancelled')
     vi.spyOn(clack, 'isCancel').mockImplementation(() => true)