feat(nvim): set leader to Space

Space is otherwise a no-op duplicate of "l" in normal mode, making it
free to claim without losing any real functionality. Verified live
against the installed plugin set that <leader>a... (Claude Code) and
<leader>x (CoC snippet convert) now resolve under <Space>.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/md/editors.md

@@ -86,7 +86,7 @@ Config lives in `nvim/`. Deployed to `~/.config/nvim/` during `shell` module ins
 
 ### Keybindings
 
-All custom bindings live in `nvim/init.lua`. Leader is the Vim default (`\`), unchanged.
+All custom bindings live in `nvim/init.lua`. Leader is `<Space>` (`vim.g.mapleader = " "`) — Space otherwise duplicates `l` (move right) in normal mode, so it was free to claim.
 
 #### Window navigation
 

nvim/init.lua

@@ -15,6 +15,13 @@ end
 -- Prepend lazy's path so Neovim can find and load it before any other plugin.
 vim.opt.rtp:prepend(lazypath)
 
+-- ── Leader ────────────────────────────────────────────────────────────────────
+-- Space is otherwise a no-op duplicate of "l" (move right) in normal mode, so
+-- claiming it as leader costs nothing. Must be set before lazy.setup(), since
+-- lazy resolves "<leader>" in plugin `keys` specs (e.g. claudecode.nvim below)
+-- at spec-registration time.
+vim.g.mapleader = " "
+
 -- ── Plugins ───────────────────────────────────────────────────────────────────
 require("lazy").setup({
     -- CyberQueer colorscheme loaded from the local dotfiles tree (not from GitHub)