JSDoc @type completion not working inside function argument

### 🔎 Search Terms

jsdoc, completion

### 🕗 Version & Regression Information

Never seems to have worked

### ⏯ Playground Link

_No response_

### 💻 Code

JSDoc has some completion issues with completions like this:

```js
function someFunc(/** @type {^cursor here^} **/) {}
```

❌ Does not work - `@type` completion (in function argument) from `@import` with named argument
```
///

// @allowJS: true
// @checkJs: true
// @module: esnext

// @filename: ./a.ts
////export interface ABC {}

// @filename: ./b.js
/////** @import * as t from "./a" */
////function someFunc(/** @type {t./**/} */arg) {}

verify.completions({
marker: "",
includes: "ABC",
});
```

✅ Works - `@type` completion (in function argument) from `@typedef` and with named argument

```
///

// @allowJS: true
// @checkJs: true
// @module: esnext

// @filename: ./b.js
/////** @typedef {number} SomeNumber */
////function someFunc(/** @type {S/**/} */arg) {}

verify.completions({
marker: "",
includes: "SomeNumber",
});
```

✅ Works - `@type` completion (not part of function argument) from `@import` completion inside

```
///

// @allowJS: true
// @checkJs: true
// @module: esnext

// @filename: ./a.ts
////export interface ABC {}

// @filename: ./b.js
/////** @import * as t from "./a" */
/////** @type {t./**/} */

verify.completions({
marker: "",
includes: "ABC",
});
```

❌ Does not work - `@type` completion (in function argument) from `@import` (argument not named yet)
```
///

// @allowJS: true
// @checkJs: true
// @module: esnext

// @filename: ./a.ts
////export interface ABC {}

// @filename: ./b.js
/////** @import * as t from "./a" */
////function someFunc(/** @type {t./**/} */) {}

verify.completions({
marker: "",
includes: "ABC",
});
```

❌ Does not work - `@type` completion (in function argument) `@typedef` (argument not named yet)

```
///

// @allowJS: true
// @checkJs: true
// @module: esnext

// @filename: ./b.js
/////** @typedef {number} SomeNumber */
////function someFunc(/** @type {S/**/} */) {}

verify.completions({
marker: "",
includes: "SomeNumber",
});
```

### 🙁 Actual behavior

See above, completions are missing.

### 🙂 Expected behavior

See above, completions are present.

### Additional information about the issue

_No response_

Start with the fourslash.ts reproductions in the issue, especially the virtual b.js cases using JSDoc @type inside a function argument. Trace TypeScript language-service completion handling for these JSDoc type expressions and compare it with the working @typedef and standalone cases. Done means regression coverage shows ABC and SomeNumber completions in the missing cases.

Written by the indexing model from the issue text.