Behavior difference: Comment above `@typedef` does not become comment for the corresponding emitted type in tsgo

[hkleungai]

Another follow-up on #4235.

---

Steps to reproduce

1. Start a plain new project
   • "@typescript/native-preview": "7.0.0-dev.20260618.1",
   • "typescript": "6.0.3"
2. Run npx tsgo --init to get the default tsconfig. Turn on these flags as well.
   • "allowJs": true,
   • "checkJs": true,
   • "stableTypeOrdering": true,
3. Add src/main.js. Run npx tsc & npx tsgo to see the difference.

/**
 * Comment on the `Foo` type
 *
 * @typedef {Object} Foo
 * @property {boolean} bool Whether `.bool` is true or not
 */

Behavior with typescript@6.0

/**
 * Comment on the `Foo` type
 */
export type Foo = {
    /**
     * Whether `.bool` is true or not
     */
    bool: boolean;
};

Behavior with tsgo

export type Foo = {
    /**
     * Whether `.bool` is true or not
     */
    bool: boolean;
};
/**
 * Comment on the `Foo` type
 *
 * @typedef {Object} Foo
 * @property {boolean} bool Whether `.bool` is true or not
 */