fix(tables): auto-realign on edit + stop dragging trailing | onto new row

Two bugs in the insert-mode table editing path:

1. <Tab> past the last cell (and <CR> on a table row) used <CR>+typed
   keystrokes to create a new row, which split the current line at the
   cursor — pulling the trailing | down onto the next line and mangling
   the formatting. Both paths now go through helpers that append() a
   fresh row beside the current one without touching it.

2. The table never realigned to new content. Ported the LSP-side
   render_aligned_table algorithm to Lua + VimL so smart_tab,
   smart_shift_tab, and smart_return tighten column widths locally on
   every navigation. No vim-lsp / nuwiki server roundtrip required.

Neovim side schedules the work via vim.schedule (textlock-safe);
plain Vim hands off via <Cmd>:call …<CR> to keep insert mode and
avoid the cmdline-mode flash.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

autoload/nuwiki/commands.vim

@@ -684,6 +684,170 @@ function! nuwiki#commands#paste_url() abort
   call s:exec('nuwiki.link.pasteUrl', l:args)
 endfunction
 
+" ===== Pure-VimL table alignment =====
+"
+" Mirrors `lua/nuwiki/commands.lua`'s `align_table_at` so plain Vim
+" buffers get the same "tighten columns as cells grow" behaviour the
+" Neovim path enjoys, without needing a vim-lsp roundtrip. Algorithm
+" matches `crates/nuwiki-lsp/src/commands.rs::ops::render_aligned_table`.
+
+function! s:is_table_row(line) abort
+  return a:line =~# '^\s*|.*|\s*$'
+endfunction
+
+function! s:table_cell_starts(line) abort
+  " 1-based byte positions of each `|`. Cursor lands one past pipe N at
+  " 1-based byte (starts[N] + 1) — that's the first space inside the
+  " cell the pipe opens.
+  let l:out = []
+  let l:pos = 0
+  while 1
+    let l:bar = stridx(a:line, '|', l:pos)
+    if l:bar < 0 | break | endif
+    call add(l:out, l:bar + 1)
+    let l:pos = l:bar + 1
+  endwhile
+  return l:out
+endfunction
+
+function! s:find_table_range(row) abort
+  let l:total = line('$')
+  let l:s = a:row
+  while l:s > 1 && s:is_table_row(getline(l:s - 1))
+    let l:s -= 1
+  endwhile
+  let l:e = a:row
+  while l:e < l:total && s:is_table_row(getline(l:e + 1))
+    let l:e += 1
+  endwhile
+  return [l:s, l:e]
+endfunction
+
+function! s:parse_table_row(line) abort
+  let l:indent = matchstr(a:line, '^\s*')
+  let l:body = strpart(a:line, len(l:indent))
+  let l:segments = []
+  let l:pos = 0
+  while 1
+    let l:bar = stridx(l:body, '|', l:pos)
+    if l:bar < 0
+      call add(l:segments, strpart(l:body, l:pos))
+      break
+    endif
+    call add(l:segments, strpart(l:body, l:pos, l:bar - l:pos))
+    let l:pos = l:bar + 1
+  endwhile
+  " Drop the empty piece before the opening `|` and the trailing piece
+  " after the closing `|`.
+  if len(l:segments) > 0 && l:segments[0] ==# ''
+    call remove(l:segments, 0)
+  endif
+  if len(l:segments) > 0 && l:segments[-1] =~# '^\s*$'
+    call remove(l:segments, -1)
+  endif
+  call map(l:segments, {_, c -> substitute(substitute(c, '^\s\+', '', ''), '\s\+$', '', '')})
+  return [l:indent, l:segments]
+endfunction
+
+function! s:is_sep_cell(s) abort
+  return a:s !=# '' && a:s =~# '^[-:[:space:]]\+$'
+endfunction
+
+function! s:is_sep_row(cells) abort
+  if empty(a:cells) | return 0 | endif
+  for l:c in a:cells
+    if !s:is_sep_cell(l:c) | return 0 | endif
+  endfor
+  return 1
+endfunction
+
+function! s:compute_widths(rows) abort
+  let l:max_cols = 0
+  for l:r in a:rows
+    if len(l:r.cells) > l:max_cols
+      let l:max_cols = len(l:r.cells)
+    endif
+  endfor
+  let l:widths = repeat([1], l:max_cols)
+  for l:r in a:rows
+    if !s:is_sep_row(l:r.cells)
+      let l:i = 0
+      for l:c in l:r.cells
+        let l:w = strchars(l:c)
+        if l:w > l:widths[l:i]
+          let l:widths[l:i] = l:w
+        endif
+        let l:i += 1
+      endfor
+    endif
+  endfor
+  return l:widths
+endfunction
+
+function! s:render_table_row(indent, cells, widths, all_sep) abort
+  let l:out = a:indent . '|'
+  let l:i = 0
+  for l:w in a:widths
+    if a:all_sep
+      let l:out .= repeat('-', l:w + 2)
+    else
+      let l:c = l:i < len(a:cells) ? a:cells[l:i] : ''
+      let l:pad = l:w - strchars(l:c)
+      if l:pad < 0 | let l:pad = 0 | endif
+      let l:out .= ' ' . l:c . repeat(' ', l:pad) . ' '
+    endif
+    let l:out .= '|'
+    let l:i += 1
+  endfor
+  return l:out
+endfunction
+
+function! s:align_table_at(row) abort
+  let [l:s, l:e] = s:find_table_range(a:row)
+  let l:rows = []
+  let l:i = l:s
+  while l:i <= l:e
+    let [l:indent, l:cells] = s:parse_table_row(getline(l:i))
+    call add(l:rows, { 'indent': l:indent, 'cells': l:cells })
+    let l:i += 1
+  endwhile
+  let l:widths = s:compute_widths(l:rows)
+  if empty(l:widths) | return | endif
+  let l:new_lines = []
+  for l:r in l:rows
+    call add(l:new_lines, s:render_table_row(l:r.indent, l:r.cells, l:widths, s:is_sep_row(l:r.cells)))
+  endfor
+  call setline(l:s, l:new_lines)
+endfunction
+
+" Public helpers invoked via `<Cmd>` from the `<expr>` mappings. We
+" can't mutate the buffer from inside the `<expr>` body (textlock), so
+" the mappings hand off here via `<Cmd>:call …<CR>`, which runs an Ex
+" command without leaving insert mode.
+
+function! nuwiki#commands#_table_insert_row_below(row, cursor_col) abort
+  call s:align_table_at(a:row)
+  let l:line = getline(a:row)
+  let l:indent = matchstr(l:line, '^\s*')
+  let l:starts = s:table_cell_starts(l:line)
+  let l:cells = max([len(l:starts) - 1, 1])
+  let l:new_row = l:indent . '|' . repeat('   |', l:cells)
+  call append(a:row, l:new_row)
+  call cursor(a:row + 1, a:cursor_col)
+endfunction
+
+function! nuwiki#commands#_table_jump_to_cell(row, target_idx) abort
+  call s:align_table_at(a:row)
+  let l:starts = s:table_cell_starts(getline(a:row))
+  if a:target_idx < 1 || a:target_idx >= len(l:starts)
+    return
+  endif
+  " `starts[N]` is the 1-based byte position of the N-th `|`. The first
+  " space inside the cell that pipe opens sits at byte `starts[N] + 1`
+  " (1-based), which is what `cursor()` wants.
+  call cursor(a:row, l:starts[a:target_idx - 1] + 1)
+endfunction
+
 " Smart <CR> for insert mode — vimwiki `:VimwikiReturn` parity.
 " Used as `inoremap <expr> <CR> nuwiki#commands#smart_return()`. The
 " returned string is fed into Vim's input stream after the function
@@ -691,13 +855,12 @@ endfunction
 function! nuwiki#commands#smart_return() abort
   let l:line = getline('.')
   " `<expr>` runs under textlock, so the function must be side-effect-
-  " free on the buffer. The returned string is fed into Vim's input
+  " free on the buffer. Buffer-mutating branches return a `<Cmd>:call
-  " stream after we unwind — we encode the table-row insertion as
+  " …<CR>` keystroke that hands off to a regular function.
-  " explicit keystrokes (matches lua/nuwiki/commands.lua).
   if l:line =~# '^\s*|.*|\s*$'
-    let l:n = max([len(split(l:line, '|', 1)) - 2, 1])
+    let l:indent = matchstr(l:line, '^\s*')
-    let l:new_row = '|' . repeat('   |', l:n)
+    let l:cursor_col = len(l:indent) + 2
-    return "\<CR>" . l:new_row . "\<Esc>0li"
+    return "\<Cmd>call nuwiki#commands#_table_insert_row_below(" . line('.') . ", " . l:cursor_col . ")\<CR>"
   endif
   let l:m = matchlist(l:line, '^\(\s*\)\([-*#]\)\s\(.*\)$')
   if empty(l:m)
@@ -730,21 +893,10 @@ endfunction
 " Insert-mode `<Tab>` / `<S-Tab>` table navigation — vimwiki parity.
 " Used as `<expr>` mappings so we can pass `<Tab>` / `<S-Tab>` through
 " verbatim when the cursor isn't on a table row.
-function! s:table_cell_starts(line) abort
-  let l:out = []
-  let l:pos = 0
-  while 1
-    let l:bar = stridx(a:line, '|', l:pos)
-    if l:bar < 0 | break | endif
-    call add(l:out, l:bar + 1)
-    let l:pos = l:bar + 1
-  endwhile
-  return l:out
-endfunction
 
 function! nuwiki#commands#smart_tab() abort
   let l:line = getline('.')
-  if l:line !~# '^\s*|.*|\s*$'
+  if !s:is_table_row(l:line)
     return "\<Tab>"
   endif
   let l:starts = s:table_cell_starts(l:line)
@@ -752,37 +904,43 @@ function! nuwiki#commands#smart_tab() abort
     return "\<Tab>"
   endif
   let l:col = col('.') - 1
-  for l:s in l:starts
+  let l:current_idx = 1
-    if l:s > l:col + 1 && l:s < len(l:line)
+  let l:i = 1
-      return "\<Esc>" . (l:s + 1) . '|i'
-    endif
-  endfor
-  let l:n = len(l:starts) - 1
-  let l:new_row = '|' . repeat('   |', l:n)
-  return "\<CR>" . l:new_row . "\<Esc>0li"
-endfunction
-
-function! nuwiki#commands#smart_shift_tab() abort
-  let l:line = getline('.')
-  if l:line !~# '^\s*|.*|\s*$'
-    return "\<S-Tab>"
-  endif
-  let l:starts = s:table_cell_starts(l:line)
-  if len(l:starts) < 2
-    return "\<S-Tab>"
-  endif
-  let l:col = col('.') - 1
-  let l:current_idx = -1
-  let l:i = 0
   for l:s in l:starts
     if l:s <= l:col + 1 | let l:current_idx = l:i | endif
     let l:i += 1
   endfor
-  if l:current_idx <= 0
+  let l:target_idx = l:current_idx + 1
+  if l:target_idx < len(l:starts)
+    return "\<Cmd>call nuwiki#commands#_table_jump_to_cell(" . line('.') . ", " . l:target_idx . ")\<CR>"
+  endif
+  " Past the final cell → add a fresh row below, cursor in its first cell.
+  let l:indent = matchstr(l:line, '^\s*')
+  let l:cursor_col = len(l:indent) + 2
+  return "\<Cmd>call nuwiki#commands#_table_insert_row_below(" . line('.') . ", " . l:cursor_col . ")\<CR>"
+endfunction
+
+function! nuwiki#commands#smart_shift_tab() abort
+  let l:line = getline('.')
+  if !s:is_table_row(l:line)
     return "\<S-Tab>"
   endif
-  let l:target = l:starts[l:current_idx - 1]
+  let l:starts = s:table_cell_starts(l:line)
-  return "\<Esc>" . (l:target + 1) . '|i'
+  if len(l:starts) < 2
+    return "\<S-Tab>"
+  endif
+  let l:col = col('.') - 1
+  let l:current_idx = 0
+  let l:i = 1
+  for l:s in l:starts
+    if l:s <= l:col + 1 | let l:current_idx = l:i | endif
+    let l:i += 1
+  endfor
+  if l:current_idx <= 1
+    return "\<S-Tab>"
+  endif
+  let l:target_idx = l:current_idx - 1
+  return "\<Cmd>call nuwiki#commands#_table_jump_to_cell(" . line('.') . ", " . l:target_idx . ")\<CR>"
 endfunction
 
 " `:VimwikiNormalizeLink` — wrap the word at cursor as `[[word]]`

lua/nuwiki/commands.lua

@@ -582,28 +582,192 @@ function M.list_toggle_or_add_checkbox()
   vim.api.nvim_buf_set_lines(0, row - 1, row, false, { new_line })
 end
 
+-- ===== Pure-Lua table alignment =====
+--
+-- The LSP exposes `nuwiki.table.align` (see `M.table_align()` below),
+-- but that path is async — by the time the workspace edit lands the
+-- cursor has already been positioned by our keystrokes, which leaves
+-- the cursor visually mid-cell after columns expand. For insert-mode
+-- editing we replicate the alignment logic locally so we can realign
+-- *before* placing the cursor, all in a single `vim.schedule` tick.
+-- The algorithm matches `crates/nuwiki-lsp/src/commands.rs::ops::
+-- render_aligned_table`.
+
+local function is_table_row(line)
+  return line ~= nil and line:match('^%s*|.*|%s*$') ~= nil
+end
+
+local function table_cell_starts(line)
+  -- Returns 1-based byte positions of each `|` separator. Cell N spans
+  -- (starts[N], starts[N+1]); placing the cursor at 0-based byte column
+  -- `starts[i]` lands one position past the i-th `|` (the first space
+  -- of the cell that the `|` opens).
+  local out = {}
+  local pos = 0
+  while true do
+    local bar = line:find('|', pos + 1, true)
+    if not bar then break end
+    table.insert(out, bar)
+    pos = bar
+  end
+  return out
+end
+
+local function find_table_range(row)
+  -- 1-based inclusive line numbers spanning the table that contains `row`.
+  local total = vim.api.nvim_buf_line_count(0)
+  local s = row
+  while s > 1 and is_table_row(vim.fn.getline(s - 1)) do
+    s = s - 1
+  end
+  local e = row
+  while e < total and is_table_row(vim.fn.getline(e + 1)) do
+    e = e + 1
+  end
+  return s, e
+end
+
+local function parse_table_row(line)
+  local indent = line:match('^(%s*)') or ''
+  local body = line:sub(#indent + 1)
+  local segments = {}
+  local pos = 1
+  while true do
+    local bar = body:find('|', pos, true)
+    if not bar then
+      table.insert(segments, body:sub(pos))
+      break
+    end
+    table.insert(segments, body:sub(pos, bar - 1))
+    pos = bar + 1
+  end
+  -- Drop the empty piece before the opening `|` and the trailing piece
+  -- after the closing `|`.
+  if #segments > 0 and segments[1] == '' then table.remove(segments, 1) end
+  if #segments > 0 and segments[#segments]:match('^%s*$') then
+    table.remove(segments, #segments)
+  end
+  for i, c in ipairs(segments) do
+    segments[i] = c:match('^%s*(.-)%s*$') or ''
+  end
+  return indent, segments
+end
+
+local function is_separator_cell(s)
+  return s ~= '' and s:match('^[%-:%s]+$') ~= nil
+end
+
+local function is_separator_row(cells)
+  if #cells == 0 then return false end
+  for _, c in ipairs(cells) do
+    if not is_separator_cell(c) then return false end
+  end
+  return true
+end
+
+local function content_width(s)
+  -- Match the LSP-side `chars().count()` so user-triggered `gqq` and
+  -- the auto-realign here agree on column widths.
+  local ok, w = pcall(vim.fn.strchars, s, 1)
+  if ok and type(w) == 'number' then return w end
+  return #s
+end
+
+local function compute_table_widths(rows)
+  local widths = {}
+  local max_cols = 0
+  for _, r in ipairs(rows) do
+    if #r.cells > max_cols then max_cols = #r.cells end
+  end
+  for i = 1, max_cols do widths[i] = 1 end
+  for _, r in ipairs(rows) do
+    if not is_separator_row(r.cells) then
+      for i, c in ipairs(r.cells) do
+        local w = content_width(c)
+        if w > widths[i] then widths[i] = w end
+      end
+    end
+  end
+  return widths
+end
+
+local function render_table_row(indent, cells, widths, all_sep)
+  local out = { indent, '|' }
+  for i = 1, #widths do
+    local w = widths[i]
+    if all_sep then
+      table.insert(out, string.rep('-', w + 2))
+    else
+      local c = cells[i] or ''
+      local pad = w - content_width(c)
+      if pad < 0 then pad = 0 end
+      table.insert(out, ' ' .. c .. string.rep(' ', pad) .. ' ')
+    end
+    table.insert(out, '|')
+  end
+  return table.concat(out)
+end
+
+local function align_table_at(row)
+  local s, e = find_table_range(row)
+  local lines = vim.api.nvim_buf_get_lines(0, s - 1, e, false)
+  local rows = {}
+  for _, l in ipairs(lines) do
+    local indent, cells = parse_table_row(l)
+    table.insert(rows, { indent = indent, cells = cells })
+  end
+  local widths = compute_table_widths(rows)
+  if #widths == 0 then return end
+  local new_lines = {}
+  for _, r in ipairs(rows) do
+    table.insert(new_lines, render_table_row(r.indent, r.cells, widths, is_separator_row(r.cells)))
+  end
+  vim.api.nvim_buf_set_lines(0, s - 1, e, false, new_lines)
+end
+
+local function ensure_insert_mode()
+  if vim.api.nvim_get_mode().mode ~= 'i' then
+    vim.cmd('startinsert')
+  end
+end
+
+local function schedule_insert_table_row_below(row)
+  -- After `align_table_at`, the row count of the table containing
+  -- `row` is fixed and `getline(row)` reflects the aligned content.
+  vim.schedule(function()
+    align_table_at(row)
+    local new_line = vim.fn.getline(row)
+    local starts = table_cell_starts(new_line)
+    if #starts < 2 then return end
+    local indent = new_line:match('^(%s*)') or ''
+    local cell_count = #starts - 1
+    local new_row = indent .. '|' .. string.rep('   |', cell_count)
+    vim.api.nvim_buf_set_lines(0, row, row, false, { new_row })
+    vim.api.nvim_win_set_cursor(0, { row + 1, #indent + 1 })
+    ensure_insert_mode()
+  end)
+end
+
 --- Smart `<CR>` for insert mode — vimwiki parity for `:VimwikiReturn`.
 --- Used as an `<expr>` keymap so the function is side-effect-free on
---- the buffer (textlock is active). The returned string is fed into
+--- the buffer (textlock is active). Non-table branches encode their
---- Vim's input stream — we encode everything (including the table-row
+--- behaviour as returned keystrokes; the table-row branch schedules a
---- insertion) as keystrokes so the user's typed keys after `<CR>` land
+--- post-textlock callback that aligns the table, inserts a fresh row,
---- at the right cursor position.
+--- and places the cursor inside the new row's first cell.
 function M.smart_return()
   local line = vim.api.nvim_get_current_line()
   local function tc(s) return vim.api.nvim_replace_termcodes(s, true, false, true) end
   local cr = tc('<CR>')
   local esc = tc('<Esc>')
 
-  -- Table row → newline + empty row + cursor inside first cell.
+  -- Table row → align existing rows, then add a fresh empty row below.
-  if line:match('^%s*|.*|%s*$') then
+  -- Doing this via `<CR>` + typed row keystrokes would split the
-    local cell_count = 0
+  -- current line at the cursor and drag the trailing `|` onto the new
-    for _ in line:gmatch('|') do cell_count = cell_count + 1 end
+  -- line — so we punt to `vim.schedule` instead.
-    cell_count = math.max(cell_count - 1, 1)
+  if is_table_row(line) then
-    local new_row = '|' .. string.rep('   |', cell_count)
+    local cur = vim.api.nvim_win_get_cursor(0)
-    -- After `<CR>` + new_row, cursor sits at end of new row. Bounce to
+    schedule_insert_table_row_below(cur[1])
-    -- normal, jump to col 0, step right past the leading `|`, re-enter
+    return ''
-    -- insert: `<Esc>0li` puts the cursor immediately after the `|`.
-    return cr .. new_row .. esc .. '0li'
   end
 
   -- List item with marker?
@@ -629,66 +793,76 @@ end
 
 --- Insert-mode `<Tab>` / `<S-Tab>` table navigation — vimwiki parity.
 --- Used as `<expr>` keymaps so we can fall back to a literal `<Tab>` /
---- `<S-Tab>` when the cursor isn't on a table row. Inside a row:
+--- `<S-Tab>` when the cursor isn't on a table row. Inside a row both
---- `<Tab>` jumps to the next cell, creating a fresh row below the
+--- variants align the table first (so columns stay tight as cells
---- current one if we were in the final cell. `<S-Tab>` jumps to the
+--- grow), then jump to the adjacent cell; `<Tab>` past the final cell
---- previous cell, no-op past the first.
+--- adds a fresh row below, `<S-Tab>` past the first cell is a no-op.
-local function table_cell_starts(line)
-  -- Returns 0-based byte offsets right after each `|` separator.
-  local out = {}
-  local pos = 0
-  while true do
-    local bar = line:find('|', pos + 1, true)
-    if not bar then break end
-    table.insert(out, bar) -- 1-based: position immediately AFTER the |
-    pos = bar
-  end
-  return out
-end
 
 function M.smart_tab()
   local line = vim.api.nvim_get_current_line()
   local function tc(s) return vim.api.nvim_replace_termcodes(s, true, false, true) end
   local tab = tc('<Tab>')
-  if not line:match('^%s*|.*|%s*$') then
+  if not is_table_row(line) then
     return tab
   end
   local cell_starts = table_cell_starts(line)
   if #cell_starts < 2 then return tab end
-  local _, col = unpack(vim.api.nvim_win_get_cursor(0)) -- 0-based byte col
+  local cur = vim.api.nvim_win_get_cursor(0)
-  -- Find the next cell start strictly after the cursor's column.
+  local row, col = cur[1], cur[2]
-  for _, start in ipairs(cell_starts) do
+  local current_idx = 1
-    if start > col + 1 and start < #line then
+  for i, start in ipairs(cell_starts) do
-      -- `<Esc>` + jump to that col (`start + 1` 1-based → +1 for space
+    if start <= col + 1 then current_idx = i end
-      -- inside the cell), then `i` to re-enter insert.
-      local target = start + 1
-      return tc('<Esc>') .. tostring(target) .. '|i'
   end
+  local target_idx = current_idx + 1
+
+  vim.schedule(function()
+    align_table_at(row)
+    local new_line = vim.fn.getline(row)
+    local starts = table_cell_starts(new_line)
+    if target_idx < #starts then
+      -- Land at the first space of the target cell (byte position
+      -- equal to the 1-based pipe position).
+      vim.api.nvim_win_set_cursor(0, { row, starts[target_idx] })
+      ensure_insert_mode()
+    else
+      local indent = new_line:match('^(%s*)') or ''
+      local cell_count = math.max(#starts - 1, 1)
+      local new_row = indent .. '|' .. string.rep('   |', cell_count)
+      vim.api.nvim_buf_set_lines(0, row, row, false, { new_row })
+      vim.api.nvim_win_set_cursor(0, { row + 1, #indent + 1 })
+      ensure_insert_mode()
     end
-  -- Past last cell → insert a new row below, cursor in first cell.
+  end)
-  local cell_count = #cell_starts - 1
+  return ''
-  local new_row = '|' .. string.rep('   |', cell_count)
-  return tc('<CR>') .. new_row .. tc('<Esc>') .. '0li'
 end
 
 function M.smart_shift_tab()
   local line = vim.api.nvim_get_current_line()
   local function tc(s) return vim.api.nvim_replace_termcodes(s, true, false, true) end
   local stab = tc('<S-Tab>')
-  if not line:match('^%s*|.*|%s*$') then
+  if not is_table_row(line) then
     return stab
   end
   local cell_starts = table_cell_starts(line)
   if #cell_starts < 2 then return stab end
-  local _, col = unpack(vim.api.nvim_win_get_cursor(0))
+  local cur = vim.api.nvim_win_get_cursor(0)
-  -- Find the cell the cursor is in, then go to the *previous* cell.
+  local row, col = cur[1], cur[2]
   local current_idx
   for i, start in ipairs(cell_starts) do
     if start <= col + 1 then current_idx = i end
   end
   if not current_idx or current_idx <= 1 then return stab end
-  local target = cell_starts[current_idx - 1]
+  local target_idx = current_idx - 1
-  return tc('<Esc>') .. tostring(target + 1) .. '|i'
+
+  vim.schedule(function()
+    align_table_at(row)
+    local new_line = vim.fn.getline(row)
+    local starts = table_cell_starts(new_line)
+    if target_idx < 1 or target_idx >= #starts then return end
+    vim.api.nvim_win_set_cursor(0, { row, starts[target_idx] })
+    ensure_insert_mode()
+  end)
+  return ''
 end
 
 -- §13.1 Cluster B — table rewriters.