feat(plugins): add fff fuzzy finder and supermaven LeetCode toggle plugins

lua/plugins/fff.lua

@@ -0,0 +1,18 @@
+--- fff.nvim: rust-backed fuzzy file finder and live grep with frecency
+--- Backs the <C-f> file/grep bindings in plugins/astrocore.lua. Honours
+--- .gitignore plus per-repo .ignore files; the config.ignore_patterns
+--- snacks filter does not apply here (snacks remains for non-file sources:
+--- diagnostics, lines, LSP symbols, recent, projects, templates).
+--- @module plugins.fff
+
+return {
+  "dmtrKovalenko/fff",
+  build = function()
+    -- downloads a prebuilt binary or falls back to cargo build
+    require("fff.download").download_or_build_binary()
+  end,
+  lazy = false, -- the plugin lazy-initialises itself
+  opts = {
+    lazy_sync = true,
+  },
+}

lua/plugins/supermaven.lua

@@ -0,0 +1,53 @@
+-- Disable supermaven in JavaScript/Python buffers whose comments contain a
+-- LeetCode problem URL (solution files), and re-enable it when leaving them.
+--
+-- Note: supermaven's built-in `condition` option is one-way — its BufEnter
+-- listener gates the restart branch on `vim.g.SUPERMAVEN_DISABLED`, which
+-- `api.stop()` itself sets, so once auto-stopped it never comes back. This
+-- autocmd owns both directions instead. `vim.g.supermaven_leetcode_stopped`
+-- distinguishes our auto-stop from a manual :SupermavenStop, which stays off.
+local function is_leetcode_buffer()
+  local buf = vim.api.nvim_get_current_buf()
+  local ft = vim.bo[buf].filetype
+  local name = vim.api.nvim_buf_get_name(buf)
+  local comment_pat
+  if ft == "javascript" or ft == "javascriptreact" or name:match "%.[mc]?jsx?$" then
+    comment_pat = "^%s*[/*]"
+  elseif ft == "python" or name:match "%.py$" then
+    comment_pat = "^%s*[#\"']"
+  else
+    return false
+  end
+  -- The URL lives in the header comment block; scanning the top of the file is enough.
+  for _, line in ipairs(vim.api.nvim_buf_get_lines(buf, 0, 200, false)) do
+    if line:find "leetcode%.com/problems/" and line:match(comment_pat) then return true end
+  end
+  return false
+end
+
+local function sync()
+  local api = require "supermaven-nvim.api"
+  if is_leetcode_buffer() then
+    if api.is_running() then
+      api.stop()
+      vim.g.supermaven_leetcode_stopped = true
+    end
+  elseif vim.g.supermaven_leetcode_stopped and not api.is_running() then
+    vim.g.supermaven_leetcode_stopped = nil
+    api.start()
+  end
+end
+
+return {
+  "supermaven-inc/supermaven-nvim",
+  optional = true,
+  config = function(_, opts)
+    require("supermaven-nvim").setup(opts)
+    vim.api.nvim_create_autocmd("BufEnter", {
+      group = vim.api.nvim_create_augroup("supermaven_leetcode", { clear = true }),
+      desc = "Toggle supermaven off in LeetCode solution buffers",
+      callback = sync,
+    })
+    sync() -- plugin loads on VeryLazy; cover the buffer we're already sitting in
+  end,
+}