Fix module loading issues and improve config handling

lua/jj_mini_diff/init.lua

@@ -12,6 +12,18 @@ local config = {
   autocmd_events = { "BufReadPost", "BufWritePost", "CursorHold" },
 }
 
+-- Helper function for deep merging tables
+local function _deep_merge(target, source)
+  for k, v in pairs(source) do
+    if type(v) == "table" and type(target[k]) == "table" then
+      _deep_merge(target[k], v)
+    else
+      target[k] = v
+    end
+  end
+  return target
+end
+
 -- Helper function to run jj commands
 local function _run_jj_command(args)
   local cmd = "jj " .. table.concat(args, " ")
@@ -68,7 +80,7 @@ local function _parse_diff_output(diff_output)
     elseif line:match("^[ ]") then
       current_line_num = current_line_num + 1
       prev_line_was_deleted = false
-    elseif line:match("^[+]") then
+    elseif line:match("^[+]") then -- Simplified regex
       current_line_num = current_line_num + 1
       if prev_line_was_deleted then
         table.insert(changed_lines, current_line_num)
@@ -76,7 +88,7 @@ local function _parse_diff_output(diff_output)
         table.insert(added_lines, current_line_num)
       end
       prev_line_was_deleted = false
-    elseif line:match("^[-]") then
+    elseif line:match("^[-]") then -- Simplified regex
       -- For deleted lines, we mark the line *before* the deletion as changed,
       -- or if it's the first line, we can't mark it.
       -- This is a simplification for now.
@@ -140,11 +152,11 @@ function M.refresh_signs()
 end
 
 function M.setup(opts)
-  opts = opts or {}
-  _define_signs() -- Call to define signs
+  config = _deep_merge(config, opts or {}) -- Use custom deep merge
+  _define_signs() -- Call to define signs AFTER config merge
 
   -- Autocommands to update signs
-  vim.api.nvim_create_autocmd({ "BufReadPost", "BufWritePost", "CursorHold" }, {
+  vim.api.nvim_create_autocmd(config.autocmd_events, { -- Use configured events
     group = vim.api.nvim_create_augroup("JjMiniDiff", { clear = true }),
     callback = function()
       if _is_jj_repo() then