fix: consolidate CUID validation into single shared regex

Reuse cuidRegex from browsers.go in looksLikeCUID and update the regex
to require the first character to be a letter (matching the cuid2 spec).

Made-with: Cursor

Author: hiroTamada

cmd/browsers.go

@@ -118,8 +118,8 @@ type Int64Flag struct {
 	Value int64
 }
 
-// Regular expression to validate CUID2 identifiers (24 lowercase alphanumeric characters).
-var cuidRegex = regexp.MustCompile(`^[a-z0-9]{24}$`)
+// Regular expression to validate CUID2 identifiers (starts with a letter, 24 lowercase alphanumeric characters).
+var cuidRegex = regexp.MustCompile(`^[a-z][a-z0-9]{23}$`)
 
 // getAvailableViewports returns the list of supported viewport configurations.
 func getAvailableViewports() []string {

cmd/root.go

@@ -254,22 +254,10 @@ func isUsageError(err error) bool {
 	return false
 }
 
-// looksLikeCUID returns true if s matches the cuid2 format used for resource IDs
-// (24 lowercase alphanumeric characters).
+// looksLikeCUID returns true if s matches the cuid2 format used for resource IDs.
+// Delegates to the shared cuidRegex defined in browsers.go.
 func looksLikeCUID(s string) bool {
-	if len(s) != 24 {
-		return false
-	}
-	for i, c := range s {
-		if i == 0 {
-			if !(c >= 'a' && c <= 'z') {
-				return false
-			}
-		} else if !((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9')) {
-			return false
-		}
-	}
-	return true
+	return cuidRegex.MatchString(s)
 }
 
 // resolveProjectByName lists the caller's projects and returns the ID of the