fix(wiki): build wiki picker list from config so it works before opening a file

The picker fetched the wiki list via workspace/executeCommand, but the LSP
only starts once a vimwiki buffer exists — so a wiki could not be selected
until one was already open (chicken-and-egg). Read the list straight from
config instead (g:nuwiki_wikis / scalar fallback, the same source as
open_wiki_path) and open the chosen index directly; that auto-starts the
server via the FileType autocmd.

- Vim: new public nuwiki#commands#wiki_list(); wiki_ui_select() uses it +
  inputlist() + :edit. Global :VimwikiUISelect / :NuwikiUISelect commands.
- Neovim: config.wiki_cfg(n) + config.wiki_list() (init.lua delegates);
  commands.wiki_ui_select() uses them + vim.ui.select + :edit; global
  VimwikiUISelect / NuwikiUISelect user commands registered in setup().

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

lua/nuwiki/commands.lua

@@ -247,30 +247,29 @@ function M.wiki_tab_index(count)
   end)
 end
 
+-- Pick a wiki and open its index. The list is read straight from config
+-- (no LSP round-trip) so this works from any buffer before a wiki file is
+-- ever opened; opening the index then auto-starts the server.
 function M.wiki_ui_select()
-  exec('nuwiki.wiki.select', { {} }, function(r)
-    if type(r) ~= 'table' or #r == 0 then
-      vim.notify('nuwiki: no wikis configured')
-      return
+  local wikis = require('nuwiki.config').wiki_list()
+  if #wikis == 0 then
+    vim.notify('nuwiki: no wikis configured', vim.log.levels.WARN)
+    return
+  end
+  vim.ui.select(
+    wikis,
+    {
+      prompt = 'Select a wiki',
+      format_item = function(w)
+        return string.format('%s  (%s)', w.name, w.root)
+      end,
+    },
+    function(choice)
+      if not choice then return end
+      local path = choice.root .. '/' .. choice.idx .. choice.ext
+      vim.cmd('edit ' .. vim.fn.fnameescape(vim.fn.expand(path)))
     end
-    vim.ui.select(
-      r,
-      {
-        prompt = 'Pick a wiki',
-        format_item = function(w)
-          return string.format('%d. %s  (%s)', (w.id or 0) + 1, w.name or '?', tostring(w.root))
-        end,
-      },
-      function(choice)
-        if not choice then return end
-        exec(
-          'nuwiki.wiki.openIndex',
-          { { wiki = choice.id } },
-          function(rr) if rr and rr.uri then open_uri(rr.uri) end end
-        )
-      end
-    )
-  end)
+  )
 end
 
 function M.wiki_goto_page(name)

lua/nuwiki/config.lua

@@ -59,4 +59,39 @@ function M.apply(user)
   M.options = vim.tbl_deep_extend('force', M.defaults, user or {})
 end
 
+-- Resolve the config for wiki #n (0-based) without touching the LSP.
+-- Priority: setup() opts.wikis → g:nuwiki_wikis (VimL) → scalar opts/g: vars.
+-- Returns { name, root, ext, idx, diary_rel, diary_idx }.
+function M.wiki_cfg(n)
+  local opts  = M.options
+  local wikis = opts.wikis or vim.g.nuwiki_wikis or nil
+  local w     = wikis and wikis[(n or 0) + 1] or nil
+  local root  = (w and w.root) or opts.wiki_root or vim.g.nuwiki_wiki_root or '~/vimwiki'
+  local ext   = (w and w.file_extension) or opts.file_extension or vim.g.nuwiki_file_extension or '.wiki'
+  if not ext:match('^%.') then ext = '.' .. ext end
+  return {
+    name      = (w and w.name) or vim.fn.fnamemodify(vim.fn.expand(root), ':t'),
+    root      = root,
+    ext       = ext,
+    idx       = (w and w.index) or 'index',
+    diary_rel = (w and w.diary_rel_path) or vim.g.nuwiki_diary_rel_path or 'diary',
+    diary_idx = (w and w.diary_index) or 'diary',
+  }
+end
+
+-- The full list of configured wikis as wiki_cfg dicts. Falls back to a single
+-- entry built from the scalar wiki_root config when no list is configured.
+function M.wiki_list()
+  local wikis = M.options.wikis or vim.g.nuwiki_wikis or nil
+  local list = {}
+  if type(wikis) == 'table' and #wikis > 0 then
+    for i = 1, #wikis do
+      list[i] = M.wiki_cfg(i - 1)
+    end
+  else
+    list[1] = M.wiki_cfg(0)
+  end
+  return list
+end
+
 return M

lua/nuwiki/init.lua

@@ -18,31 +18,9 @@ local function _open(path, open_cmd)
   vim.cmd((open_cmd or 'edit') .. ' ' .. vim.fn.fnameescape(vim.fn.expand(path)))
 end
 
--- Return the config dict for wiki #n (0-based).
--- Priority: setup() opts.wikis → g:nuwiki_wikis (VimL) → scalar opts/g: vars.
+-- Return the config dict for wiki #n (0-based). See config.wiki_cfg.
 local function _wiki_cfg(n)
-  local opts  = config.options
-  local wikis = opts.wikis
-                or (vim.g.nuwiki_wikis and vim.g.nuwiki_wikis or nil)
-  local w     = wikis and wikis[(n or 0) + 1] or nil
-  local root  = (w and w.root)
-                or opts.wiki_root
-                or vim.g.nuwiki_wiki_root
-                or '~/vimwiki'
-  local ext   = (w and w.file_extension)
-                or opts.file_extension
-                or vim.g.nuwiki_file_extension
-                or '.wiki'
-  if not ext:match('^%.') then ext = '.' .. ext end
-  return {
-    root      = root,
-    ext       = ext,
-    idx       = (w and w.index) or 'index',
-    diary_rel = (w and w.diary_rel_path)
-                or vim.g.nuwiki_diary_rel_path
-                or 'diary',
-    diary_idx = (w and w.diary_index) or 'diary',
-  }
+  return config.wiki_cfg(n)
 end
 
 -- Compute the wiki index path for wiki #n (0-based) from config.
@@ -81,6 +59,16 @@ local function _setup_global_mappings()
   kmap('n', '<Leader>w<Leader>i', function() require('nuwiki.commands').diary_generate_index() end, o('rebuild diary index'))
 end
 
+-- Global wiki-picker commands so a wiki can be chosen from any buffer before
+-- a .wiki file exists. The picker reads its list from config (no LSP); the
+-- buffer-local versions in ftplugin/vimwiki.vim shadow these inside wiki
+-- buffers but dispatch to the same function.
+local function _setup_global_commands()
+  local function ui_select() require('nuwiki.commands').wiki_ui_select() end
+  vim.api.nvim_create_user_command('VimwikiUISelect', ui_select, {})
+  vim.api.nvim_create_user_command('NuwikiUISelect', ui_select, {})
+end
+
 function M.setup(opts)
   config.apply(opts or {})
 
@@ -99,6 +87,7 @@ function M.setup(opts)
 
   lsp.register()
   _setup_global_mappings()
+  _setup_global_commands()
 end
 
 function M.install()