Fixes UI issue (web UI and JSON), adds language model option

This release fixes a serious UI issue accidentally introduced in the last release, which displayed the wrong source code for profiles consisting of multiple files. This issue also affected generated JSON files, but did not affect the CLI. This release also adds the option to select different language models (GPT-3.5 or GPT-4).

Full Changelog: v1.5.23...v1.5.24.1