Bug: HTTP fetch API call is blocked with no error

I'm using the [[Vanilla JS API](https://v2.tauri.app/reference/javascript/api/#vanilla-js-api)](https://v2.tauri.app/reference/javascript/api/#vanilla-js-api) from Tauri v2.

#### 💡 Problem

The `fetch` call from `@tauri-apps/plugin-http` returns a response object, but calling `response.json()` silently hangs — no error is thrown, and execution is blocked indefinitely.

#### 🧪 Minimal Reproduction

```js
const { fetch: tauriFetch } = window.__TAURI__.http;

class WeUploader {
constructor(imageHost) {
this.imageHost = imageHost;
this.tokenUrl = "https://example.com/token";
}

async fetchAccessToken() {
try {
const response = await tauriFetch(`${this.tokenUrl}?appid=xxx&secret=yyy`);
console.log(response); // response.bodyUsed is already true
const data = await response.json(); // hangs here with no error
console.log(data);
} catch (error) {
console.error("Failed to fetch access token", error);
}
}
}
```

🖼️ Screenshot (response is printed, but `response.json()` never resolves):

---

### 🔧 Environment Details

**`package.json`:**

```json
"devDependencies": {
"@tauri-apps/cli": "^2.3.1"
},
"dependencies": {
"@tauri-apps/api": "^2.3.0",
"@tauri-apps/plugin-http": "^2.3.0"
}
```

**`Cargo.toml`:**

```toml
[build-dependencies]
tauri-build = { version = "2", features = [] }

[dependencies]
tauri-plugin-http = "2"
```

**`tauri.conf.json` permissions:**

```json
"permissions": [
{
"identifier": "http:default",
"allow": [
{ "url": "http://**" },
{ "url": "https://**" }
]
},
"http:allow-fetch",
"http:allow-fetch-cancel",
"http:allow-fetch-read-body",
"http:allow-fetch-send"
]
```

---

### ✅ Expected Behavior

Calling `await response.json()` should resolve to parsed JSON data, as in browser or other environments.

---

### 📌 Notes

* `response.bodyUsed` is already true when the response is logged, which may indicate the body is already consumed or incorrectly handled.
* There are no errors thrown, making debugging very difficult.

Let me know if you need a full reproduction repo. Thanks!