no-conflicting-container-name-declarations

Disallow reusing the same container name with conflicting static container-type declarations.

Why

Container names become contracts between the container declaration and every @container rule that targets that name. Reusing one name for different type contracts makes query behavior depend on selector context and is difficult to review safely.

❌ Incorrect

.layout {
 container: shell / inline-size;
}

.dialog {
 container: shell / size;
}

✅ Correct

.layout {
 container: shell / inline-size;
}

.dialog {
 container: dialog / size;
}