Fix glp backward cycle and gl<Space> current-list scope

Two documented checkbox-list mappings did not match their spec:

- `glp` dispatched the same forward-only cycleCheckbox as `gln`, so it
  could never "cycle the checkbox state backward". Add `ops::cycle_state_back`
  and thread a `reverse` flag through the dispatcher and both clients.

- `gl<Space>` and `gL<Space>` both swept the whole buffer, making them
  identical. `gl<Space>` now passes the cursor position and the server
  scopes deletion to the contiguous list block under the cursor (current
  list, cascading into sublists); `gL<Space>` stays whole-buffer.

Adds Rust unit tests, plus behavioral and full-registration coverage for
the documented mapping surface in the Neovim and Vim keymap harnesses, and
a command-coverage suite mirroring the doc's command groups.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

scripts/test-keymaps-vim.vim

@@ -95,6 +95,107 @@ else
   call s:record(0, 'cmd.NuwikiIndex_defined', ':NuwikiIndex not registered')
 endif
 
+" ===== Documented command surface (doc/nuwiki.txt §5) =====
+" Every command must be reachable in BOTH the canonical :Nuwiki* form and
+" the vimwiki-compatible :Vimwiki* form. The suffixes below are the §5 list
+" minus the prefix. :NuwikiInstall is the one exception — it's a nuwiki-only
+" maintenance command with no :Vimwiki* alias, so it's checked separately.
+
+let s:both_forms = [
+      \ 'Index', 'TabIndex', 'UISelect', 'Goto', 'FollowLink', 'Backlinks',
+      \ 'NextLink', 'PrevLink', 'BaddLink', 'RenameFile', 'DeleteFile',
+      \ 'MakeDiaryNote', 'MakeYesterdayDiaryNote', 'MakeTomorrowDiaryNote',
+      \ 'DiaryIndex', 'DiaryGenerateLinks', 'DiaryNextDay', 'DiaryPrevDay',
+      \ 'TOC', 'GenerateLinks', 'CheckLinks', 'SearchTags', 'GenerateTagLinks',
+      \ 'RebuildTags', '2HTML', '2HTMLBrowse', 'All2HTML', 'Rss',
+      \ ]
+for s:suffix in s:both_forms
+  for s:prefix in ['Nuwiki', 'Vimwiki']
+    let s:cmd = s:prefix . s:suffix
+    let s:ok = exists(':' . s:cmd) == 2
+    call s:record(s:ok ? 1 : 0, 'surface.' . s:cmd,
+          \ s:ok ? '' : ':' . s:cmd . ' not registered')
+  endfor
+endfor
+let s:ok = exists(':NuwikiInstall') == 2
+call s:record(s:ok ? 1 : 0, 'surface.NuwikiInstall',
+      \ s:ok ? '' : ':NuwikiInstall not registered')
+
+" ===== Pure-VimL command invocation (cursor movement) =====
+" :NuwikiNextLink / :NuwikiPrevLink wrap search('\[\[', …) so they run
+" entirely in VimL and move the cursor without touching the LSP.
+
+call s:set_buf(['intro [[A]] more [[B]] end'])
+call cursor(1, 1)
+silent NuwikiNextLink
+call s:record(
+      \ col('.') == 7 ? 1 : 0,
+      \ 'invoke.NuwikiNextLink_jumps_to_first_link',
+      \ 'col=' . col('.'))
+silent NuwikiNextLink
+call s:record(
+      \ col('.') == 18 ? 1 : 0,
+      \ 'invoke.NuwikiNextLink_jumps_to_second_link',
+      \ 'col=' . col('.'))
+silent NuwikiPrevLink
+call s:record(
+      \ col('.') == 7 ? 1 : 0,
+      \ 'invoke.NuwikiPrevLink_jumps_back',
+      \ 'col=' . col('.'))
+
+" The :Vimwiki* alias must drive the identical motion.
+call cursor(1, 1)
+silent VimwikiNextLink
+call s:record(
+      \ col('.') == 7 ? 1 : 0,
+      \ 'invoke.VimwikiNextLink_jumps_to_first_link',
+      \ 'col=' . col('.'))
+
+" ===== Documented mapping surface (doc §6/§7/§8) =====
+" Every documented mapping must resolve to a buffer-local mapping in the
+" mode(s) the doc lists it under. The mouse group is opt-in — the shell
+" wrapper sets g:nuwiki_mouse_mappings before the ftplugin loads.
+
+function! s:has_map(lhs, mode) abort
+  let l:d = maparg(a:lhs, a:mode, 0, 1)
+  return !empty(l:d) && get(l:d, 'buffer', 0)
+endfunction
+
+let s:mapping_surface = [
+      \ ['<CR>', 'n'], ['<S-CR>', 'n'], ['<C-CR>', 'n'], ['<C-S-CR>', 'n'],
+      \ ['<BS>', 'n'], ['<Tab>', 'n'], ['<S-Tab>', 'n'], ['+', 'nx'],
+      \ ['<C-Space>', 'nx'], ['<C-@>', 'nx'], ['<Nul>', 'nx'],
+      \ ['gnt', 'n'], ['gln', 'nx'], ['glp', 'nx'], ['glx', 'nx'],
+      \ ['glh', 'n'], ['gll', 'n'], ['gLh', 'n'], ['gLl', 'n'],
+      \ ['glr', 'n'], ['gLr', 'n'], ['gl<Space>', 'n'], ['gL<Space>', 'n'],
+      \ ['o', 'n'], ['O', 'n'],
+      \ ['=', 'n'], ['-', 'n'], [']]', 'n'], ['[[', 'n'],
+      \ [']=', 'n'], ['[=', 'n'], [']u', 'n'], ['[u', 'n'],
+      \ ['gqq', 'n'], ['gq1', 'n'], ['gww', 'n'], ['gw1', 'n'],
+      \ ['<A-Left>', 'n'], ['<A-Right>', 'n'],
+      \ ['<Leader>ww', 'n'], ['<Leader>ws', 'n'], ['<Leader>wi', 'n'],
+      \ ['<Leader>w<Leader>w', 'n'], ['<Leader>w<Leader>y', 'n'],
+      \ ['<Leader>w<Leader>t', 'n'], ['<Leader>w<Leader>i', 'n'],
+      \ ['<Leader>wn', 'n'], ['<Leader>wd', 'n'], ['<Leader>wr', 'n'],
+      \ ['<Leader>wh', 'n'], ['<Leader>whh', 'n'], ['<Leader>wha', 'n'],
+      \ ['<Leader>wc', 'nx'], ['<C-Down>', 'n'], ['<C-Up>', 'n'],
+      \ ['<2-LeftMouse>', 'n'], ['<S-2-LeftMouse>', 'n'], ['<C-2-LeftMouse>', 'n'],
+      \ ['<MiddleMouse>', 'n'], ['<RightMouse>', 'n'],
+      \ ['ah', 'ox'], ['ih', 'ox'], ['aH', 'ox'], ['iH', 'ox'],
+      \ ['al', 'ox'], ['il', 'ox'], ['a\', 'ox'], ['i\', 'ox'],
+      \ ['ac', 'ox'], ['ic', 'ox'],
+      \ ['<CR>', 'i'], ['<Tab>', 'i'], ['<S-Tab>', 'i'],
+      \ ['<C-D>', 'i'], ['<C-T>', 'i'],
+      \ ['<C-L><C-J>', 'i'], ['<C-L><C-K>', 'i'], ['<C-L><C-M>', 'i'],
+      \ ]
+for s:entry in s:mapping_surface
+  for s:m in split(s:entry[1], '\zs')
+    let s:ok = s:has_map(s:entry[0], s:m)
+    call s:record(s:ok ? 1 : 0, 'map[' . s:m . '].' . s:entry[0],
+          \ s:ok ? '' : s:entry[0] . ' (' . s:m . ') not mapped buffer-local')
+  endfor
+endfor
+
 " ===== Header nav (pure VimL) =====
 
 call s:run('headers.]]_jumps_to_next', {
@@ -121,6 +222,12 @@ call s:run('headers.]=_jumps_to_next_sibling', {
       \ 'keys': ']=',
       \ 'expect_cursor_line': 4,
       \ })
+call s:run('headers.[=_jumps_to_prev_sibling', {
+      \ 'lines': ['= A =', '== child ==', 'body', '= B ='],
+      \ 'cursor': [4, 1],
+      \ 'keys': '[=',
+      \ 'expect_cursor_line': 1,
+      \ })
 
 " ===== Link nav (pure VimL) =====