Mixins created from `obj.constructor` cannot have members

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### 🔎 Search Terms

mixin constructor property instance

### 🕗 Version & Regression Information

- This is the behavior in every version I tried, and I reviewed the FAQ for entries about mixins

### ⏯ Playground Link

https://www.typescriptlang.org/play/?ts=5.7.3#code/C4TwDgpgBAwg9gOwM7AE4FcDGw6oDwAqAfFALxQIQDuAFAHQMCGqA5kgFxSMIgDaAugEoyJAgG4AUBMwAbRkiRQAYnDhQA3hKhQA9DqgB1XAGsuqOOgQATKAAtgwMBz0sAlsFvoARnUxwAtjr+rpjmSHAAZsA6BOAQAMqhrmDRrgroEEg6AMwAHAAsAIxaUFYQsszQvABEfshoWDio1fyc8PUY2Lh4HmlEkgC+UhGW2K6IUACyrgAergiFhFAQM8AQ1ortKJ1NeCpwREQ0SOiQqBUKnATCmtp6UADyANIlqBDA6KgIUBeKK2sbKAnM6-DQlbQRVQRGg3IbaAaDYajYDjb7TOYIABMS3+6ysin2RzgXgAVlcbiV7jA5AooAByGgAQQQiBA-gsil+gjpUHmflQb2wMhAy1WeMUXnk0FBdIIdLolP09KZLJ47PQnJpSG5vMU8iQrhYCEYXhk0BwUA80sQ20Y82AUEilri9LlABooF50A7ZTy-OgZDYvNB5ihuCjGGsbFR3LYuKVXBEIhA3ggHScvKBII6Ij8bWg7Wn6ft5a93p9vqDcYDiSTfPmdrgwdoIVCYRo4VAERIhkA

### 💻 Code

```ts
type Constructor = new(...args: any[]) => T;

class Foo {
// Work around https://github.com/microsoft/TypeScript/issues/3841
declare ["constructor"]: Constructor;
}

function Mixin1>(superclass: T) {
// OK
return class extends superclass {
foof() {}
};
}

function Mixin2(obj: T) {
// Class '(Anonymous class)' incorrectly extends base class 'T'.
// '(Anonymous class)' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Foo'.
return class extends obj.constructor {
foof() {}
};
}
```

### 🙁 Actual behavior

`Mixin1` compiles fine, but `Mixin2` has an error:

```
Class '(Anonymous class)' incorrectly extends base class 'T'.
'(Anonymous class)' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Foo'.
```

Removing the `foof` member causes it to compile without error.

### 🙂 Expected behavior

Both should compile fine because they are doing the same thing.

### Additional information about the issue

_No response_

Bắt đầu bằng cách chạy bản tái hiện được liên kết trong TypeScript Playground và so sánh Mixin1 với Mixin2, tập trung vào biểu thức kế thừa lớp sử dụng obj.constructor. Issue được hoàn tất khi Mixin2 có thể giữ lại thành viên foof mà không gặp lỗi kế thừa đã báo cáo, trong khi Mixin1 vẫn tiếp tục biên dịch.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.