nvim ftplugin tweaks

CONFIG/nvim/after/ftplugin/lua.lua

@@ -0,0 +1,18 @@
+local bufname = vim.api.nvim_buf_get_name(0)
+local filename_arg = bufname ~= "" and ("--stdin-filepath " .. vim.fn.shellescape(bufname) .. " ") or ""
+
+-- Indentation & Layout
+vim.opt_local.colorcolumn = "120"
+vim.opt_local.textwidth = 120
+vim.opt_local.tabstop = 4
+vim.opt_local.shiftwidth = 4
+vim.opt_local.softtabstop = 4
+vim.opt_local.expandtab = true
+
+-- Formatting Behavior
+vim.opt_local.formatoptions:remove("t")
+vim.opt_local.formatoptions:append("j")
+
+-- gq Formatters (StyLua fallback, LSP primary)
+vim.bo.formatprg = "stylua " .. filename_arg .. "-"
+vim.bo.formatexpr = "v:lua.vim.lsp.formatexpr()"