Diagnostic code 8030 being incorrectly generated using JSDoc `@type` on a function.

まだ誰も着手していません。

### 🔎 Search Terms

Diagnostic 8030 is being generated incorrectly when using JSDoc `@type` on a method when the type is being referred to from an interface. This is using the new `tsc` LSP - version 7.0.2.

### 🕗 Version & Regression Information

- This changed between versions 7.0.0-dev.260707.2 and 7.0.2.
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about new native issues being transferred into the main typescript repo.

### ⏯ Playground Link

_No response_

### 💻 Code

```ts
// types.ts
interface Example {
method (): number;
}
export {};

// code.js
const exampleFns = {
/**
* @type {Example['method']} // A JSDoc `@type` tag on a function must have a signature with the correct number of arguments.
*/
method () {
return Math.random();
}
};
```

### 🙁 Actual behavior

in this example, the diagnostic and LSP info does not tell the user that typescript is internally suffixing `| undefined` to the type. As such wrapping the type in `NonNullable` removes the error diagnostic, I do not believe this to be intended behaviour as previous iterations the golang native LSP `tsgo` (7.0.0-dev.260707.2) did not produce this diagnostic, nor did previous versions of typescript.

### 🙂 Expected behavior

The type should be properly referenced with no additional suffixing of types, as it used to.

### Additional information about the issue

_No response_

まず、報告された TypeScript 7.0.2 と以前の 7.0.0-dev.260707.2 を使って、types.ts と code.js で診断を再現します。Example['method'] への JSDoc @type 参照がどのように解決され、なぜ | undefined が追加されるのかを追跡します。この例に対する回帰テストのカバレッジがあり、有効なメソッド型で診断 8030 が生成されなくなれば完了です。

索引モデルが issue の本文から書いたものです。