remove unused nix code

flake.lock: Update

Flake lock file updates:

• Updated input 'neovim-nightly-overlay':
    'github:nix-community/neovim-nightly-overlay/b7b3632fab34541543373254c265da03c1d0f240?narHash=sha256-SDLZMha2miaChOBGBkQJlTtk2kvcB7WIVVZ2l0/9byc%3D' (2025-10-01)
  → 'github:nix-community/neovim-nightly-overlay/7ff73a295b0065bde2f8b43b31558136ca77bd98?narHash=sha256-39JFRb006AOsIcOq%2B03H3y6YcGyaphk1CW5DRi14cOE%3D' (2025-10-13)
• Updated input 'neovim-nightly-overlay/flake-parts':
    'github:hercules-ci/flake-parts/4524271976b625a4a605beefd893f270620fd751?narHash=sha256-%2BuWLQZccFHwqpGqr2Yt5VsW/PbeJVTn9Dk6SHWhNRPw%3D' (2025-09-01)
  → 'github:hercules-ci/flake-parts/758cf7296bee11f1706a574c77d072b8a7baa881?narHash=sha256-wfG0S7pltlYyZTM%2BqqlhJ7GMw2fTF4mLKCIVhLii/4M%3D' (2025-10-01)
• Updated input 'neovim-nightly-overlay/git-hooks':
    'github:cachix/git-hooks.nix/54df955a695a84cd47d4a43e08e1feaf90b1fd9b?narHash=sha256-ytw7ROXaWZ7OfwHrQ9xvjpUWeGVm86pwnEd1QhzawIo%3D' (2025-09-17)
  → 'github:cachix/git-hooks.nix/cfc9f7bb163ad8542029d303e599c0f7eee09835?narHash=sha256-PTod9NG%2Bi3XbbnBKMl/e5uHDBYpwIWivQ3gOWSEuIEM%3D' (2025-10-03)
• Updated input 'neovim-nightly-overlay/neovim-src':
    'github:neovim/neovim/198c9e9bca7549cf7110be8c6f1df1c38d4e747f?narHash=sha256-oc1pPeoe8458X0r/Wum8CucVcJLlIp4mg%2B1HiOSVRgA%3D' (2025-09-30)
  → 'github:neovim/neovim/72b0bfa1fb7e897e5126aabae718a5480f466b9e?narHash=sha256-RnB%2BoJcP37YT9pjr1osUQtJc%2B1qcVyaaeSbiSyXwm1Y%3D' (2025-10-12)
• Updated input 'neovim-nightly-overlay/nixpkgs':
    'github:NixOS/nixpkgs/647e5c14cbd5067f44ac86b74f014962df460840?narHash=sha256-JVZl8NaVRYb0%2B381nl7LvPE%2BA774/dRpif01FKLrYFQ%3D' (2025-09-28)
  → 'github:NixOS/nixpkgs/362791944032cb532aabbeed7887a441496d5e6e?narHash=sha256-gKl2Gtro/LNf8P%2B4L3S2RsZ0G390ccd5MyXYrTdMCFE%3D' (2025-10-11)
• Updated input 'neovim-nightly-overlay/treefmt-nix':
    'github:numtide/treefmt-nix/5eda4ee8121f97b218f7cc73f5172098d458f1d1?narHash=sha256-ySNJ008muQAds2JemiyrWYbwbG%2BV7S5wg3ZVKGHSFu8%3D' (2025-09-24)
  → 'github:numtide/treefmt-nix/761ae7aff00907b607125b2f57338b74177697ed?narHash=sha256-gq9rdocpmRZCwLS5vsHozwB6b5nrOBDNc2kkEaTXHfg%3D' (2025-10-10)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d48b56f4899ee1d5377291576284969c9e37acc2?narHash=sha256-7G5fSMPNVwWNlFpZLwvKB8PUOaqPzFQbrtZ7RAzg2nw%3D' (2025-10-01)
  → 'github:NixOS/nixpkgs/09c05674757a82f32b67f70f702e56c4901a3cdd?narHash=sha256-IzUhHp/jU06jBW6S%2Bd12AO3sgq5yehYVTCBH7J6re5c%3D' (2025-10-13)

flake.lock: Update

Flake lock file updates:

• Updated input 'neovim-nightly-overlay/nixpkgs':
    'github:NixOS/nixpkgs/362791944032cb532aabbeed7887a441496d5e6e?narHash=sha256-gKl2Gtro/LNf8P%2B4L3S2RsZ0G390ccd5MyXYrTdMCFE%3D' (2025-10-11)
  → follows 'nixpkgs'

nvim/after/lua/iofq/minidiff_jj.lua

@@ -0,0 +1,103 @@
+local diff = require('mini.diff')
+local M = {
+  cache = {},
+}
+
+M.get_buf_realpath = function(buf_id)
+  local path = vim.loop.fs_realpath(vim.api.nvim_buf_get_name(buf_id)) or ''
+  local cwd, basename = vim.fn.fnamemodify(path, ':h'), vim.fn.fnamemodify(path, ':t')
+  return path, cwd, basename
+end
+
+M.jj_start_watching_tree_state = function(buf_id, path)
+  local on_not_in_jj = vim.schedule_wrap(function()
+    if not vim.api.nvim_buf_is_valid(buf_id) then
+      M.cache[buf_id] = nil
+      return false
+    end
+    diff.fail_attach(buf_id)
+    M.cache[buf_id] = {}
+  end)
+
+  vim.system(
+    { 'jj', 'workspace', 'root', '--ignore-working-copy' },
+    {cwd = vim.fn.fnamemodify(path, ':h')},
+    function(obj)
+      if obj.code ~= 0 then
+        return on_not_in_jj()
+      end
+
+      -- Set up index watching
+      local root = obj.stdout:gsub('\n+$', '') .. '/.jj/working_copy/tree_state'
+      local buf_fs_event = vim.loop.new_fs_event()
+
+      buf_fs_event:start(root, { stat = true }, function()
+        M.jj_set_ref_text(buf_id)
+      end)
+      M.cache[buf_id] = { fs_event = buf_fs_event }
+
+      -- Set reference text immediately
+      M.jj_set_ref_text(buf_id)
+    end
+  )
+end
+
+M.jj_set_ref_text = vim.schedule_wrap(function(buf_id)
+  if not vim.api.nvim_buf_is_valid(buf_id) then
+    return
+  end
+
+  local buf_set_ref_text = function(text)
+    pcall(diff.set_ref_text, buf_id, text)
+  end
+
+  -- react to possible rename
+  local path, cwd, basename = M.get_buf_realpath(buf_id)
+  if path == '' then
+    return buf_set_ref_text {}
+  end
+
+  vim.system(
+    { 'jj', 'file', 'show', '--no-pager', '--ignore-working-copy', '-r', '@-', './' .. basename },
+    { cwd = cwd },
+    vim.schedule_wrap(function(obj)
+      if obj.code ~= 0 then return buf_set_ref_text {} end
+      buf_set_ref_text(obj.stdout:gsub('\r\n', '\n'))
+    end)
+  )
+end)
+
+M.jj_invalidate_cache = function(buf_id)
+  pcall(vim.loop.fs_event_stop, M.cache[buf_id].fs_event)
+  M.cache[buf_id] = nil
+end
+
+M.gen_source = function()
+  local attach = function(buf_id)
+    -- Try attaching to a buffer only once
+    if M.cache[buf_id] ~= nil then
+      return false
+    end
+    -- - Possibly resolve symlinks to get data from the original repo
+    local path = M.get_buf_realpath(buf_id)
+    if path == '' then
+      return false
+    end
+
+    M.cache[buf_id] = {}
+    M.jj_start_watching_tree_state(buf_id, path)
+  end
+
+  local detach = function(buf_id)
+    M.jj_invalidate_cache(buf_id)
+  end
+
+
+  return {
+    name = 'jj',
+    attach = attach,
+    detach = detach,
+    apply_hunks = function(_, _) end -- staging does not apply for jj
+  }
+end
+return M

nvim/after/lua/iofq/snacks_jj.lua

@@ -0,0 +1,52 @@
+local M = {}
+
+function M.status()
+  local function get_files()
+    local status_raw = vim.fn.system('jj diff --no-pager --quiet --summary')
+    local files = {}
+
+    for status in status_raw:gmatch('[^\r\n]+') do
+      local state, file = string.match(status, '^(%a)%s(.+)$')
+
+      if state and file then
+        local hl = ''
+        if state == 'A' then
+          hl = 'SnacksPickerGitStatusAdded'
+        elseif state == 'M' then
+          hl = 'SnacksPickerGitStatusModified'
+        elseif state == 'D' then
+          hl = 'SnacksPickerGitStatusDeleted'
+        elseif state == 'R' then
+          hl = 'SnacksPickerGitStatusRenamed'
+          file = string.match(file, '{.-=>%s*(.-)}')
+        end
+
+        local diff = vim.fn.system('jj diff ' .. file .. ' --no-pager --stat --git')
+        table.insert(files, {
+          file = file,
+          filename_hl = hl,
+          diff = diff,
+        })
+      end
+    end
+
+    return files
+  end
+
+  Snacks.picker.pick {
+    source = 'jj_status',
+    items = get_files(),
+    format = 'file',
+    title = 'jj status',
+    preview = function(ctx)
+      if ctx.item.file then
+        Snacks.picker.preview.diff(ctx)
+      else
+        ctx.preview:reset()
+        ctx.preview:set_title('No preview')
+      end
+    end,
+  }
+end
+
+return M