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Closing out §13.1's smallest cluster. Three commands move from "not yet implemented" stubs to real behaviour: - `nuwiki.link.pasteWikilink` (server, executeCommand) — derives the current page name from the source URI + wiki root, returns a `WorkspaceEdit` inserting `[[<page>]]` at the requested cursor position. - `nuwiki.link.pasteUrl` (server) — same lookup, but the inserted text is the page's relative HTML output URL (`<page>.html`, including subdir segments) so the snippet survives when the export root moves. - `nuwiki.link.normalize` (client) — wraps the word at cursor as `[[word]]` without following. Reuses the `wrap_cword_as_wikilink` helper that already powers the `<CR>` two-step. Pure-VimL on the Vim path; pure-Lua on the Neovim path. No LSP round-trip. Keymaps: - `+` (normal + visual) now actually calls `normalize_link` on both editor paths instead of stubbing with a "deferred" notification. Tests: - 5 new Rust unit tests in `cluster_c_link_helpers.rs` covering command-list presence + the page-name derivation for root and subdirectory pages + the URL / wikilink shape strings. - Neovim keymap harness gains a `links.normalize_via_+` case (20 passing now, up from 19). Vim harness inherits the same command-presence check via its existing smoke tests. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>