Update fzf lua markdown headings picker

ftplugin/markdown.lua

@@ -48,3 +48,40 @@ local keymap = vim.keymap
 -- end
 --
 -- keymap.set("n", "<leader>fdh", markdown_headings, { desc = "Grep: Markdown headings" })
+
+-- FZF lua headings picker
+local picker = require("fzf-lua")
+
+local function fzf_lua_markdown_headings()
+  local bufnr = vim.api.nvim_get_current_buf()
+  local lines = vim.api.nvim_buf_get_lines(bufnr, 0, -1, false)
+  local headings = {}
+
+  for lnum, line in ipairs(lines) do
+    local heading = line:match('^(#+%s+.+)$')
+    if heading then
+      vim.notify("Found heading: " .. heading, vim.log.levels.INFO)
+      table.insert(headings, {
+        lnum = lnum,
+        text = heading,
+        display = string.format("%4d: %s", lnum, heading)
+      })
+    end
+  end
+  picker.fzf_exec(function(fzf_cb)
+    for _, heading in ipairs(headings) do
+      fzf_cb(heading.display)
+    end
+    fzf_cb() -- EOF
+  end, {
+    prompt = "Markdown headings> ",
+    actions = {
+      ['default'] = function(selected)
+        local line_num = tonumber(selected[1]:match("%d+"))
+        vim.api.nvim_win_set_cursor(0, { line_num, 0 })
+      end
+    }
+  })
+end
+
+keymap.set("n", "<leader>fdh", fzf_lua_markdown_headings, { desc = "Grep: Markdown headings" })