fix(git): handle untracked directories in action_discard

lua/git/status_win.lua

@@ -805,11 +805,20 @@ local function action_discard()
 
     local prompt, action
     if entry.section == "Untracked" then
-        prompt = string.format("Delete untracked file %s?", entry.path)
+        -- Porcelain v1 collapses untracked directories into a single
+        -- entry with a trailing slash, so plain `os.remove` (which only
+        -- deletes files / empty dirs) won't do.
+        local is_dir = entry.path:sub(-1) == "/"
+        prompt = string.format(
+            "Delete untracked %s %s?",
+            is_dir and "directory" or "file",
+            entry.path
+        )
         action = function()
-            local ok, err = os.remove(vim.fs.joinpath(s.worktree, entry.path))
-            if not ok then
-                log.error("failed to remove %s: %s", entry.path, err or "")
+            local target = vim.fs.joinpath(s.worktree, entry.path)
+            local rc = vim.fn.delete(target, is_dir and "rf" or "")
+            if rc ~= 0 then
+                log.error("failed to delete %s", entry.path)
             end
             refresh(vim.api.nvim_get_current_buf())
         end