Not currectly parse superClass starts with `{}`

### 🔎 Search Terms

"superClass"

### 🕗 Version & Regression Information

- This changed between versions ______ and _______
- This changed in commit or PR _______
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about _________
- I was unable to test this on prior versions because _______

### ⏯ Playground Link

_No response_

### 💻 Code

```ts
class A extends {}.Foo {}
```

```ts
class A extends {}! {}
```

### 🙁 Actual behavior

They are not correctly parsed as super class.

### 🙂 Expected behavior

They should both parse as superClass.

### Additional information about the issue

The following are correctly parsed.

```
class A extends {} {}
```

```
class A extends {Foo}.Foo {}
```

Reproduce the two reported class declarations and compare their parsing with the working examples in the issue. Trace the TypeScript parser's handling of class heritage clauses and computed or non-null-asserted expressions, then add regression coverage for both forms. Done means both snippets are parsed with the intended superclass while existing examples remain unchanged.

Written by the indexing model from the issue text.