FzfLua: Add command to search in filtered files

lua/custom/fzf_lua.lua

@@ -87,13 +87,51 @@ local function live_grep_in_quick_fix_list_files()
 
   if #files > 0 then
     fzf_lua.live_grep({
-      search_dirs = files,
+      search_paths = files,
     })
   else
     print("No files in quickfix list")
   end
 end
 
+-- Two-step search in cwd:
+-- 1) type a literal file name prefix (e.g. `Go - `, case-insensitive), <Tab> multi-select
+--    or <C-q> to take all matches
+-- 2) live_grep restricted to the files picked in step 1
+local function grep_in_filtered_files()
+  local cwd = vim.fn.getcwd()
+
+  -- rg matches the glob against the file name only; escape glob metacharacters
+  local function files_cmd(args)
+    local prefix = (args[1] or ""):gsub("[%*%?%[%]{}\\]", "\\%0")
+    return string.format("rg --files --color=never --iglob %s", vim.fn.shellescape(prefix .. "*"))
+  end
+
+  ---@diagnostic disable-next-line: missing-fields
+  fzf_lua.fzf_live(files_cmd, {
+    cwd = cwd,
+    prompt = "Filename starts with❯ ",
+    exec_empty_query = true,
+    fzf_opts = { ["--multi"] = true },
+    actions = {
+      ["default"] = function(selected)
+        if not selected or #selected == 0 then
+          return
+        end
+        local files = {}
+        for _, name in ipairs(selected) do
+          table.insert(files, cwd .. "/" .. name)
+        end
+        fzf_lua.live_grep({
+          cwd = cwd,
+          prompt = string.format("Grep in %d files❯ ", #files),
+          search_paths = files,
+        })
+      end,
+    },
+  })
+end
+
 local function find_all_files_including_hidden()
   fzf_lua.files(
     {
@@ -125,6 +163,7 @@ keymap("n", "<leader>fh", function() fzf_lua.help_tags() end, { desc = "FZF: dis
 keymap("n", "<leader>fa", find_all_files_including_hidden, { desc = "FZF: Find all files" })
 keymap('n', '<leader>fp', live_grep_with_glob, { desc = 'Live grep with glob pattern' })
 keymap('n', '<leader>fcp', live_grep_in_current_dir, { desc = 'Live grep in current directory' })
+keymap('n', '<leader>fv', grep_in_filtered_files, { desc = "Filter files by name, then grep inside them" })
 keymap('n', '<leader>ccp', copy_file_path_and_position, { desc = "Copy cursor position" })
 keymap('n', '<leader>ccd', copy_current_file_path, { desc = 'Copy current file path' })
 keymap('n', '<leader>ccf', copy_filename, { desc = 'Copy current file path' })