Remove stale phase/spec references from code comments

Strip "Phase N", "SPEC §X.Y", and "v1.x" planning labels from comments
across the Rust crates and editor layers now that those tracking
artifacts are gone. Comments only — no logic, strings, or test names
touched.

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

autoload/nuwiki/commands.vim

@@ -1,5 +1,5 @@
 " autoload/nuwiki/commands.vim — Vim-side wrappers around the LSP
-" commands the server advertises (Phase 19).
+" commands the server advertises.
 "
 " Lives in autoload/ so the cost is paid only when a `:Vimwiki*` /
 " `:Nuwiki*` command is actually invoked. Dispatches via vim-lsp's
@@ -634,9 +634,9 @@ function! nuwiki#commands#rename_file() abort
   endif
 endfunction
 
-" ===== §13.1 deferred =====
+" ===== Deferred =====
 
-" §13.1 Cluster A — list rewriters.
+" Cluster A — list rewriters.
 
 " `gl<Space>` — remove done items from the current list only. Passing the
 " cursor position scopes the server to the contiguous list block under it.
@@ -737,7 +737,7 @@ function! nuwiki#commands#list_toggle_or_add_checkbox() abort
   let l:new = strpart(l:line, 0, l:end) . '[ ] ' . strpart(l:line, l:end)
   call setline('.', l:new)
 endfunction
-" §13.1 Cluster B — table rewriters.
+" Cluster B — table rewriters.
 
 function! nuwiki#commands#table_insert(...) abort
   let l:cols = a:0 >= 1 ? str2nr(a:1) : 3
@@ -815,7 +815,7 @@ function! nuwiki#commands#colorize(...) abort
         \ . strpart(l:line, l:right - 1)
   call setline('.', l:new)
 endfunction
-" §13.1 Cluster C — link helpers.
+" Cluster C — link helpers.
 
 function! nuwiki#commands#paste_link() abort
   let l:p = s:cursor_position()

autoload/nuwiki/lsp.vim

@@ -1,6 +1,6 @@
 " autoload/nuwiki/lsp.vim — Vim (non-Neovim) LSP client wiring.
 "
-" Spec §7.4 preference order:
+" Preference order:
 "   1. vim-lsp (matoto/vim-lsp)
 "   2. coc.nvim
 "   3. Print an error if neither is available.