[idea] Auto-format on save with toggle #32

What

Add an opt-in auto-format-on-save autocmd backed by conform, with a buffer-local toggle command so it can be disabled per-file when needed.

Where

lua/config/plugin_config.lua — alongside the existing conform setup block.

Why it matters

The config already has <leader>lf for manual formatting and a full conform setup with per-filetype formatters (stylua, ruff_format, prettier). The missing piece is automatic formatting on write. A global always-on auto-format can be disruptive (e.g., linting noise in files you don't own), so a toggle is important.

Sketch

-- inside the conform setup block
vim.g.autoformat = true

vim.api.nvim_create_autocmd("BufWritePre", {
    callback = function(ev)
        if vim.g.autoformat then
            conform.format({ bufnr = ev.buf })
        end
    end,
})

vim.api.nvim_create_user_command("ToggleAutoFormat", function()
    vim.g.autoformat = not vim.g.autoformat
    vim.notify("Auto-format: " .. (vim.g.autoformat and "on" or "off"))
end, {})

Could also expose it as a statusline indicator (shows [fmt] when enabled) given the custom statusline is already in place.