Add directory-scoped Telescope pickers and smart folding

lua/tools/folding.lua

@@ -1,27 +1,43 @@
-vim.opt.foldmethod = "expr"
-vim.opt.foldexpr = "nvim_treesitter#foldexpr()"
+-- Smart folding: native treesitter for small files, indent for large files
+local LARGE_FILE_THRESHOLD = 1000
 
+local function setup_folding()
+	local line_count = vim.api.nvim_buf_line_count(0)
+
+	if line_count > LARGE_FILE_THRESHOLD then
+		-- Large files: indent-based folding (fast)
+		vim.opt_local.foldmethod = "indent"
+	else
+		-- Normal files: native treesitter folding
+		vim.opt_local.foldmethod = "expr"
+		vim.opt_local.foldexpr = "v:lua.vim.treesitter.foldexpr()"
+	end
+end
+
+vim.api.nvim_create_autocmd({ "BufReadPost", "FileType" }, {
+	group = vim.api.nvim_create_augroup("myconfig-smart-folding", { clear = true }),
+	callback = setup_folding,
+})
+
+-- Global fold settings
 vim.opt.foldcolumn = "0"
 vim.opt.foldtext = ""
-
 vim.opt.foldlevel = 99
 vim.opt.foldlevelstart = 99
-
 vim.opt.foldnestmax = 3
 
-vim.keymap.set('n', '<leader>z', function()
-  local any_fold_open = false
-  for lnum = 1, vim.fn.line('$') do
-    if vim.fn.foldclosed(lnum) ~= -1 then
-      any_fold_open = true
-      break
-    end
-  end
-  if any_fold_open then
-    -- There's at least one closed fold, so open all
-    vim.cmd('normal! zR')
-  else
-    -- All folds are open, so close all
-    vim.cmd('normal! zM')
-  end
-end, { noremap = true, silent = true })
+-- Toggle all folds with <leader>z
+vim.keymap.set("n", "<leader>z", function()
+	local any_fold_closed = false
+	for lnum = 1, vim.fn.line("$") do
+		if vim.fn.foldclosed(lnum) ~= -1 then
+			any_fold_closed = true
+			break
+		end
+	end
+	if any_fold_closed then
+		vim.cmd("normal! zR")
+	else
+		vim.cmd("normal! zM")
+	end
+end, { noremap = true, silent = true, desc = "Toggle all folds" })