'import from curl' truncates post body when processing base64 string

### Expected Behavior

The whole POST BODY should be parsed

### Actual Behavior

When using "import from cURL", pasting this
```bash
curl -H 'sid: 3aea5a3e7f474f348bab813c5da47db6' -H 'user-agent: Mozilla/5.0 (Linux; Android 12; Redmi K30 Pro Build/SKQ1.211006.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/96.0.4664.104 Mobile Safari/537.36' -H 'content-type: application/json; charset=UTF-8' --compressed -X POST 'https://fat-taxiapi.hellobike.com/api#inner_action=hitch.PaxPublishOrderPage.PageInitFunction' -d '......"MTc1NTQxMjAwNw==.LDYf4uMgeVhaY34J6XCrFrE75WspYHmpJVQoopaEhEo=........!!!This sentence is truncated!!!'
```

the result is `......"MTc1NTQxMjAwNw`, the string after `==.` is truncated.

### Reproduction Steps

_No response_

### Is there an existing issue for this?

- [x] I have searched the [issue tracker](https://www.github.com/Kong/insomnia/issues) for this problem.

### Which sync method do you use?

- [ ] Git sync.
- [ ] Insomnia Cloud sync.
- [x] Local only

### Additional Information

_No response_

### Insomnia Version

11.1.0

### What operating system are you using?

macOS

### Operating System Version

15.4.1 (24E263)

### Installation method

from github release

### Last Known Working Insomnia version

_No response_

Start with the Insomnia "import from cURL" flow and reproduce the issue using the cURL command in the report. Verify that the complete POST body, including the base64 text after `==.`, is preserved rather than truncated.

Written by the indexing model from the issue text.