navigation: make sure to quit vim if oil is the only open buffer

lua/core/autocmds.lua

@@ -6,6 +6,35 @@ vim.api.nvim_create_autocmd("TextYankPost", {
     end,
 })
 
+-- Quit Neovim if only oil windows remain (skip during startup)
+_G._nvim_ready = false
+vim.api.nvim_create_autocmd("VimEnter", {
+    group = vim.api.nvim_create_augroup("nvim_ready_flag", { clear = true }),
+    callback = function()
+        vim.schedule(function() _G._nvim_ready = true end)
+    end,
+})
+
+function _G.quit_if_only_oil()
+    vim.schedule(function()
+        if not _G._nvim_ready then return end
+        for _, win in ipairs(vim.api.nvim_tabpage_list_wins(0)) do
+            if vim.api.nvim_win_get_config(win).relative == "" then
+                local buf = vim.api.nvim_win_get_buf(win)
+                local ft = vim.bo[buf].filetype
+                local name = vim.api.nvim_buf_get_name(buf)
+                if ft ~= "oil" and name ~= "" then
+                    return
+                end
+                if ft ~= "oil" and name == "" and vim.bo[buf].modified then
+                    return
+                end
+            end
+        end
+        vim.cmd("qa")
+    end)
+end
+
 -- Buffer tab navigation (per-window, exclusive)
 local function cycle_buf(dir)
     local bufs = _G.get_win_bufs()
@@ -38,9 +67,16 @@ vim.keymap.set("n", "<leader>x", function()
         vim.bo.bufhidden = "wipe"
     end
     vim.cmd("bdelete " .. current)
+    _G.quit_if_only_oil()
 end, { desc = "Close buffer tab" })
 
 
+-- Also check when a window is closed (e.g. :q)
+vim.api.nvim_create_autocmd("WinClosed", {
+    group = vim.api.nvim_create_augroup("quit_if_only_oil_winclose", { clear = true }),
+    callback = function() _G.quit_if_only_oil() end,
+})
+
 -- Prevent splitting from oil — redirect to last code window
 vim.api.nvim_create_autocmd("WinNew", {
     group = vim.api.nvim_create_augroup("no_split_oil", { clear = true }),