feat(commands): ChangeSymbolTo -range, GenerateLinks path filter, NuwikiGenerateTags

Closes the three new command gaps from the 2026-05-31 re-audit (all real,
client-side, both clients x Vimwiki/Nuwiki):

- VimwikiChangeSymbolTo / ListChangeSymbolI / NuwikiChangeSymbol are now
  -range -nargs=1 via a new list_change_symbol_range(symbol,l1,l2) helper that
  loops over_range; was -nargs=1 only -> E481 on a visual selection.
  ChangeSymbolInListTo / ChangeSymbolInList stay range-less and keep
  whole_list=true.

- VimwikiGenerateLinks / NuwikiGenerateLinks are now -nargs=?; with an arg the
  client dispatches the existing server command nuwiki.links.generateForPath
  ({path}) for real subtree-scoped link generation, else nuwiki.links.generate.
  Was bare -> E488 on an arg.

- Added NuwikiGenerateTags (Vim + Neovim) mirroring VimwikiGenerateTags, with
  -nargs=? -complete=...tags - closes the :Vimwiki*<->:Nuwiki* alias asymmetry.

Tests: cmd.ChangeSymbolTo_range_sets_marker, cmd.GenerateLinks_accepts_optional_path,
cmd.NuwikiGenerateTags_exists (test-keymaps.lua, 283 pass) +
cmd.VimwikiChangeSymbolTo_accepts_range, cmd.VimwikiGenerateLinks_accepts_path,
cmd.NuwikiGenerateTags_exists (test-keymaps-vim.vim, 272/18/21). fmt clean.

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

development/vimwiki-gap.md

@@ -235,10 +235,8 @@ fix site.
   `NuwikiChangeSymbol`) are now `-range -nargs=1` passing `<line1>,<line2>,
   <q-args>` to a new `list_change_symbol_range(symbol, l1, l2)` helper that
   loops `over_range` (both clients). `ChangeSymbolInListTo`/`InList` stay
-  range-less. **Bonus bug found + fixed:** the Neovim `VimwikiChangeSymbolInListTo`
-  and `NuwikiChangeSymbolInList` defs passed `whole_list=false`, so they changed
-  only the current item instead of the whole list — corrected to `true`. Covered
-  by `cmd.ChangeSymbolTo_range_sets_marker` (`test-keymaps.lua`) +
+  range-less (and correctly keep `whole_list=true`). Covered by
+  `cmd.ChangeSymbolTo_range_sets_marker` (`test-keymaps.lua`) +
   `cmd.VimwikiChangeSymbolTo_accepts_range` (`test-keymaps-vim.vim`).
 - [x] **`VimwikiGenerateLinks` lacks `-nargs=?`** _(new, 2026-05-31 re-audit;
   fixed same day)_ — upstream takes an optional rel-path arg; nuwiki was bare,

ftplugin/vimwiki.vim

@@ -430,8 +430,8 @@ command! -buffer        VimwikiToggleRejectedListItem lua require('nuwiki.comman
 command! -buffer        VimwikiListToggle           lua require('nuwiki.commands').list_toggle_or_add_checkbox()
 command! -buffer -range        VimwikiIncrementListItem    lua require('nuwiki.commands').list_cycle_symbol_range(1, <line1>, <line2>)
 command! -buffer -range        VimwikiDecrementListItem    lua require('nuwiki.commands').list_cycle_symbol_range(-1, <line1>, <line2>)
-command! -buffer -nargs=1 VimwikiChangeSymbolTo       lua require('nuwiki.commands').list_change_symbol(<q-args>, false)
-command! -buffer -nargs=1 VimwikiListChangeSymbolI    lua require('nuwiki.commands').list_change_symbol(<q-args>, false)
+command! -buffer -range -nargs=1 VimwikiChangeSymbolTo       lua require('nuwiki.commands').list_change_symbol_range(<q-args>, <line1>, <line2>)
+command! -buffer -range -nargs=1 VimwikiListChangeSymbolI    lua require('nuwiki.commands').list_change_symbol_range(<q-args>, <line1>, <line2>)
 command! -buffer -nargs=1 VimwikiChangeSymbolInListTo lua require('nuwiki.commands').list_change_symbol(<q-args>, true)
 command! -buffer -bang  VimwikiRemoveDone            lua require('nuwiki.commands')[('<bang>' == '!') and 'list_remove_done_all' or 'list_remove_done']()
 command! -buffer -range VimwikiRemoveSingleCB       lua require('nuwiki.commands').list_remove_checkbox()
@@ -526,7 +526,7 @@ command! -buffer -range -nargs=+ NuwikiListChangeLvl        lua require('nuwiki.
 command! -buffer        NuwikiListToggle             lua require('nuwiki.commands').list_toggle_or_add_checkbox()
 command! -buffer -range        NuwikiIncrementListItem      lua require('nuwiki.commands').list_cycle_symbol_range(1, <line1>, <line2>)
 command! -buffer -range        NuwikiDecrementListItem      lua require('nuwiki.commands').list_cycle_symbol_range(-1, <line1>, <line2>)
-command! -buffer -nargs=1 NuwikiChangeSymbol           lua require('nuwiki.commands').list_change_symbol(<q-args>, false)
+command! -buffer -range -nargs=1 NuwikiChangeSymbol           lua require('nuwiki.commands').list_change_symbol_range(<q-args>, <line1>, <line2>)
 command! -buffer -nargs=1 NuwikiChangeSymbolInList     lua require('nuwiki.commands').list_change_symbol(<q-args>, true)
 command! -buffer -nargs=? NuwikiNormalizeLink        lua require('nuwiki.commands').normalize_link(<args>)
 command! -buffer        NuwikiRenumberList           lua require('nuwiki.commands').list_renumber()