feat: add submit hook

[jingyi-zhao-01]

below is a sample on_submit hook with working demo

hooks = {
           ["on_submit"] = {
                 function(question, buffer, status_msg)
                   local ts = os.date("%y-%m-%d-%H-%M")
                   local safe_status = (status_msg or "unknown"):gsub("%s+", "_")



                   local submissions_dir =  "/home/jingyi/.local/share/nvim/leetcode/submissions"
                   vim.fn.mkdir(submissions_dir, "p")
           
				   local file = string.format(
					                       "%s/%s-%s-%s.txt",
					                       submissions_dir,
					                       question.q.title_slug,
					                       safe_status,
					                       ts
					                     )           
                   -- write buffer contents
  				   vim.fn.writefile(vim.split(buffer or "", "\n"), file)
           
                   print("Saved submission to", file)
                 end,
               }
          },

2025-09-17-003214_hyprcap.mp4

[Copilot]

Pull Request Overview

This PR adds a new on_submit hook to the LeetCode plugin that triggers when a solution is submitted. The hook provides access to the question, buffer contents, and submission status message.

• Adds on_submit hook definition to the configuration template
• Implements hook execution in the runner when a submission is detected
• Includes utility module import for hook execution

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
lua/leetcode/config/template.lua	Adds the on_submit hook type definition with proper typing
lua/leetcode/runner/init.lua	Imports utils module and executes the on_submit hook when submission is detected

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[kawre]

The hook should include information about whether the submission was successful. You can do it by adding a success parameter sourced from item._.success

[jingyi-zhao-01]

added ._.success into the hook parameter, it's now up to the hook implementation to how to differentiate successful submission and failure submission in case one wants to thoroughly review his submission quality