halfrost/LeetCode-Go ? reverse-engineered prompt

Build me a Go project that collects LeetCode solutions by topic, with clean explanations and test coverage, so I can use it as a study guide and interview prep resource.

I want the code organized by problem and algorithm category, with solutions written in a simple, consistent style, plus tests for the important cases. It should also feel like a small online book or notes site that I can read in the browser, and it would be great if it supports offline reading and a dark mode.

Please make it easy to browse by data structure and algorithm type, like arrays, linked lists, trees, dynamic programming, backtracking, sorting, and so on. If you need to check current docs or best practices for Go or static site setup, look them up online.