fix(search): graceful no-match + NuwikiSearch alias (re-audit follow-up)

Re-audit of the just-landed command work found one real bug I introduced
and a convention gap:

- VimwikiSearch / VWS raised a raw E480 on a no-match search; upstream
  reports it gracefully. Both clients now catch it (try/catch in Vim,
  pcall in Neovim) and emit "nuwiki: no match for <pat>".

- Added a NuwikiSearch alias alongside VimwikiSearch/VWS (every other
  command carries a Nuwiki* form).

Gap-doc note corrected: nuwiki's search populates + opens the location
list (shows all matches) where upstream jumps to the first match — logged
as a minor presentation divergence rather than claiming exact parity.

Config + mappings re-audits came back clean (no new gaps, no regressions;
table-mapping rewire verified non-recursive, gLH/gLL/gLR present).

Tests: cmd.VimwikiSearch_no_match_graceful, surface.{Vimwiki,Nuwiki}Search.
Neovim 301, Vim 294/18/21 pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

autoload/nuwiki/commands.vim

@@ -205,7 +205,12 @@ function! nuwiki#commands#search(args) abort
   endif
   let l:ext = l:ext[0] ==# '.' ? l:ext : '.' . l:ext
   let l:glob = l:root ==# '' ? '**' : fnameescape(l:root) . '**/*' . l:ext
+  try
     execute 'lvimgrep /' . escape(l:pat, '/') . '/j ' . l:glob
+  catch /E480/
+    echohl WarningMsg | echom 'nuwiki: no match for ' . l:pat | echohl None
+    return
+  endtry
   lopen
 endfunction
 

development/tests/test-keymaps-vim.vim

@@ -112,7 +112,7 @@ let s:both_forms = [
       \ 'RebuildTags', '2HTML', '2HTMLBrowse', 'All2HTML', 'Rss',
       \ 'NormalizeLink', 'RenumberList', 'RenumberAllLists',
       \ 'ListToggle', 'IncrementListItem', 'DecrementListItem',
-      \ 'CatUrl', 'ShowVersion', 'Return', 'Var',
+      \ 'CatUrl', 'ShowVersion', 'Return', 'Var', 'Search',
       \ ]
 for s:suffix in s:both_forms
   for s:prefix in ['Nuwiki', 'Vimwiki']
@@ -692,6 +692,18 @@ call s:record(
       \ 'cmd.search_and_tablealign_nargs',
       \ 'err=' . s:attr_err)
 
+" A no-match search must be caught (friendly message), not raise a raw E480.
+let s:nm_err = ''
+try
+  VimwikiSearch zzznomatchxyzqqq
+catch /E480/
+  let s:nm_err = v:exception
+catch
+  " other errors (no wiki files, etc.) are fine — only E480 is the regression.
+endtry
+call s:record(s:nm_err ==# '' ? 1 : 0,
+      \ 'cmd.VimwikiSearch_no_match_graceful', 'err=' . s:nm_err)
+
 " ===== :VimwikiGoto -nargs=* =====
 " Was -nargs=1, so a page name with a space raised E488 (and the empty-arg
 " prompt fallback was unreachable). Now -nargs=*: a multi-word arg must parse.

development/tests/test-keymaps.lua

@@ -139,7 +139,7 @@ vim.defer_fn(function()
     'RebuildTags', '2HTML', '2HTMLBrowse', 'All2HTML', 'Rss',
     'NormalizeLink', 'RenumberList', 'RenumberAllLists',
     'ListToggle', 'IncrementListItem', 'DecrementListItem',
-    'CatUrl', 'ShowVersion', 'Return', 'Var',
+    'CatUrl', 'ShowVersion', 'Return', 'Var', 'Search',
   }
   for _, suffix in ipairs(both_forms) do
     for _, prefix in ipairs({ 'Nuwiki', 'Vimwiki' }) do

development/vimwiki-gap.md

@@ -269,10 +269,14 @@ fix site.
   through `nuwiki#commands#search` / `commands.search` (both clients), which
   resolves the wiki whose root contains the current file (else the first
   configured wiki, else CWD) and `lvimgrep`s `<root>/**/*<ext>` into the location
-  list; an empty pattern reuses the last search (`@/`). The `-nargs=*` attr fix
+  list; an empty pattern reuses the last search (`@/`); a no-match is caught and
-  (2026-06-03) is folded in. _(nuwiki uses Vim's `lvimgrep` rather than a bespoke
+  reported (no raw `E480`). Added a `NuwikiSearch` alias alongside
-  engine — the same mechanism vimwiki uses — so this is full behavioral parity.)_
+  `VimwikiSearch`/`VWS`. The `-nargs=*` attr fix (2026-06-03) is folded in.
-  Covered by `cmd.search_and_tablealign_nargs` (`test-keymaps-vim.vim`).
+  nuwiki uses Vim's `lvimgrep` — the same mechanism vimwiki uses. **Minor
+  presentation divergence:** nuwiki populates + opens the location list (`/j`,
+  then `:lopen`) showing all matches, whereas upstream jumps to the first match
+  and leaves the list closed. Covered by `cmd.search_and_tablealign_nargs`
+  (`test-keymaps-vim.vim`).
 - [x] **`VimwikiChangeSymbolTo` / `VimwikiListChangeSymbolI` lack `-range`**
   _(new, 2026-05-31 re-audit; fixed same day)_ — upstream both carry
   `-range -nargs=1`; nuwiki had `-nargs=1` only, so a visual-range invocation

ftplugin/vimwiki.vim

@@ -95,6 +95,7 @@ if !has('nvim')
   command! -buffer        VimwikiPrevLink               call nuwiki#commands#link_prev()
   command! -buffer        VimwikiBaddLink               call nuwiki#commands#badd_link()
   command! -buffer -nargs=* VimwikiSearch  call nuwiki#commands#search(<q-args>)
+  command! -buffer -nargs=* NuwikiSearch   call nuwiki#commands#search(<q-args>)
   command! -buffer -nargs=* VWS            call nuwiki#commands#search(<q-args>)
   command! -buffer -nargs=* -complete=customlist,nuwiki#complete#pages VimwikiGoto   call nuwiki#commands#wiki_goto_page(<q-args>)
 
@@ -450,6 +451,7 @@ command! -buffer -nargs=* -complete=customlist,nuwiki#complete#pages VimwikiGoto
 command! -buffer        VimwikiBacklinks   lua vim.lsp.buf.references()
 command! -buffer        VWB                lua vim.lsp.buf.references()
 command! -buffer -nargs=* VimwikiSearch     lua require('nuwiki.commands').search(<q-args>)
+command! -buffer -nargs=* NuwikiSearch      lua require('nuwiki.commands').search(<q-args>)
 command! -buffer -nargs=* VWS               lua require('nuwiki.commands').search(<q-args>)
 
 command! -buffer        VimwikiDeleteFile lua require('nuwiki.commands').delete_file()

lua/nuwiki/commands.lua

@@ -314,7 +314,11 @@ function M.search(args)
   end
   if not ext:match('^%.') then ext = '.' .. ext end
   local glob = root == '' and '**' or (vim.fn.fnameescape(root) .. '**/*' .. ext)
-  vim.cmd('lvimgrep /' .. vim.fn.escape(pat, '/') .. '/j ' .. glob)
+  local ok = pcall(vim.cmd, 'lvimgrep /' .. vim.fn.escape(pat, '/') .. '/j ' .. glob)
+  if not ok then
+    vim.notify('nuwiki: no match for ' .. pat, vim.log.levels.WARN)
+    return
+  end
   vim.cmd('lopen')
 end