feat(nvim): switch to coder/claudecode.nvim, document all keybinds

Replace greggh/claude-code.nvim (bare terminal wrapper) with
coder/claudecode.nvim's native WebSocket bridge — inline diff review,
buffer/selection context, model switching. Runs with
terminal.provider = "native" to avoid pulling in snacks.nvim. New
commands are bound under the previously-unused <leader>a prefix, so
none of the existing single-key app toggles are disturbed.

Move the alot floating-terminal toggle from bare "n" to "m", freeing
"n" back to Vim's default repeat-search behavior.

Document the full Neovim keybind set (window nav, app toggles, Claude
Code, insert-mode completion, misc) in docs/md/editors.md — previously
undocumented.

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

docs/md/editors.md

@@ -67,6 +67,12 @@ Config lives in `nvim/`. Deployed to `~/.config/nvim/` during `shell` module ins
 |--------|---------|
 | `the_miro/cyberqueer.nvim` | CyberQueer colour scheme (local) |
 
+#### AI
+
+| Plugin | Purpose |
+|--------|---------|
+| `coder/claudecode.nvim` | Native WebSocket bridge to the Claude Code CLI — inline diff review, buffer/selection context, model switching. Runs with `terminal.provider = "native"` (no `snacks.nvim` dependency). Replaces the older `greggh/claude-code.nvim` terminal-only wrapper. |
+
 ### CoC LSP Settings
 
 `nvim/coc-settings.json` configures language servers for:
@@ -78,6 +84,72 @@ Config lives in `nvim/`. Deployed to `~/.config/nvim/` during `shell` module ins
 
 `nvim/cyberqueer-airline.vim` — a custom vim-airline theme using the CyberQueer palette, providing hot-pink/violet segments in the status bar.
 
+### Keybindings
+
+All custom bindings live in `nvim/init.lua`. Leader is the Vim default (`\`), unchanged.
+
+#### Window navigation
+
+| Key | Mode | Action |
+|-----|------|--------|
+| `Ctrl+h` / `Ctrl+j` / `Ctrl+k` | Normal, Terminal | Move to the split left/below/above |
+| `Ctrl+l` | Normal, Terminal | Cycle to the next split (wraps) |
+
+Also restored inside `calendar.vim` buffers, which otherwise steal `Ctrl+hjkl` for month navigation.
+
+#### Quick app toggles (single key, normal mode)
+
+| Key | Action |
+|-----|--------|
+| `t` | Open a new floating terminal (`vim-floaterm`) |
+| `e` | Toggle the NERDTree file-tree sidebar |
+| `s` | Toggle the `vim-dadbod-ui` database browser |
+| `q` | Save & quit; falls back to force-quit on unsaved/read-only buffers |
+| `m` | Toggle a centered floating `alot` (email) terminal |
+| `g` | Toggle a centered floating `khal interactive` (calendar) terminal |
+| `f` | Toggle a centered floating `abook` (contacts) terminal |
+| `x` | Toggle the sideward-T PIM overlay (`alot` + `abook` + `khal` panes at once) |
+
+`m` was previously `n` — moved to free up `n` for its default Vim meaning (repeat last search).
+
+#### Claude Code (`coder/claudecode.nvim`)
+
+All under the `<leader>a` ("AI") prefix — a namespace that was otherwise completely unused, so nothing above was disturbed.
+
+| Key | Mode | Action |
+|-----|------|--------|
+| `<leader>ac` | Normal | Toggle the Claude Code terminal |
+| `<leader>af` | Normal | Focus the Claude Code terminal |
+| `<leader>ar` | Normal | Resume the last Claude session (`--resume`) |
+| `<leader>aC` | Normal | Continue the last Claude session (`--continue`) |
+| `<leader>am` | Normal | Select the Claude model |
+| `<leader>ab` | Normal | Add the current buffer to Claude's context |
+| `<leader>as` | Visual | Send the selection to Claude as context |
+| `<leader>ay` | Normal | Accept the proposed diff |
+| `<leader>an` | Normal | Deny the proposed diff |
+| `<leader>aq` | Normal | Close all pending diffs |
+| `<leader>aS` | Normal | Show Claude connection status |
+
+#### Insert mode
+
+| Key | Action |
+|-----|--------|
+| `Tab` | Next completion entry (CoC popup menu if visible, else built-in keyword completion) |
+| `Shift+Tab` | Previous completion entry (CoC popup menu if visible, else literal tab) |
+| `Enter` | Confirm the CoC completion if the popup menu is visible |
+| `Ctrl+Tab` | Expand an UltiSnips snippet trigger |
+| `Ctrl+b` / `Ctrl+z` | Jump forward/backward through UltiSnips snippet placeholders |
+| `Ctrl+l` | Expand a CoC snippet |
+| `Ctrl+j` | Expand-and-jump a CoC snippet |
+
+#### Other
+
+| Key | Mode | Action |
+|-----|------|--------|
+| `<leader>x` | Visual/Select | Convert selection to a UltiSnips snippet (via CoC) |
+| `:Vb` | Command | Enter visual-block mode (alternative to `Ctrl+v`, which some terminals intercept) |
+| `:w!!` | Command | Save the current file through `sudo tee`, for read-only files |
+
 ---
 
 ## Micro

nvim/init.lua

@@ -50,12 +50,37 @@ require("lazy").setup({
     -- glow.nvim: render Markdown in a floating window via the `glow` CLI
     { "ellisonleao/glow.nvim", config = true },
     "itchyny/calendar.vim",         -- Interactive calendar; used in the PIM overlay (key "g")
-    -- claude-code.nvim: Claude Code integration (opens/communicates with the `claude` CLI)
+    -- claudecode.nvim: native WebSocket bridge to the Claude Code CLI (inline
+    -- diff review, buffer/selection context, model switching) — replaces the
+    -- older greggh/claude-code.nvim terminal-only wrapper.
+    -- terminal.provider = "native" avoids pulling in folke/snacks.nvim just
+    -- for a terminal split; everything else uses defaults.
+    -- All bindings live under <leader>a ("AI"), previously untouched, so
+    -- none of the single-key app toggles above (t/e/s/q/m/g/f/x) are disturbed.
     {
-        "greggh/claude-code.nvim",
-        dependencies = { "nvim-lua/plenary.nvim" },
+        "coder/claudecode.nvim",
+        cmd = {
+            "ClaudeCode", "ClaudeCodeFocus", "ClaudeCodeSelectModel",
+            "ClaudeCodeAdd", "ClaudeCodeSend", "ClaudeCodeStatus",
+            "ClaudeCodeDiffAccept", "ClaudeCodeDiffDeny", "ClaudeCodeCloseAllDiffs",
+        },
+        keys = {
+            { "<leader>ac", "<cmd>ClaudeCode<cr>",              desc = "Claude: toggle" },
+            { "<leader>af", "<cmd>ClaudeCodeFocus<cr>",         desc = "Claude: focus" },
+            { "<leader>ar", "<cmd>ClaudeCode --resume<cr>",     desc = "Claude: resume session" },
+            { "<leader>aC", "<cmd>ClaudeCode --continue<cr>",   desc = "Claude: continue session" },
+            { "<leader>am", "<cmd>ClaudeCodeSelectModel<cr>",   desc = "Claude: select model" },
+            { "<leader>ab", "<cmd>ClaudeCodeAdd %<cr>",         desc = "Claude: add current buffer" },
+            { "<leader>as", "<cmd>ClaudeCodeSend<cr>", mode = "v", desc = "Claude: send selection" },
+            { "<leader>ay", "<cmd>ClaudeCodeDiffAccept<cr>",    desc = "Claude: accept diff" },
+            { "<leader>an", "<cmd>ClaudeCodeDiffDeny<cr>",      desc = "Claude: deny diff" },
+            { "<leader>aq", "<cmd>ClaudeCodeCloseAllDiffs<cr>", desc = "Claude: close all diffs" },
+            { "<leader>aS", "<cmd>ClaudeCodeStatus<cr>",        desc = "Claude: connection status" },
+        },
         config = function()
-            require("claude-code").setup()
+            require("claudecode").setup({
+                terminal = { provider = "native" },
+            })
         end,
     },
 }, {
@@ -245,7 +270,7 @@ local function _pim_float(row, col, height, width, border)
     return win
 end
 
--- n/g/f: individual centered floating windows
+-- m/g/f: individual centered floating windows
 local _solo = {}
 
 local function toggle_solo(key, cmd, label)
@@ -268,7 +293,7 @@ local function toggle_solo(key, cmd, label)
     _solo[key] = win_id
 end
 
-vim.keymap.set("n", "n", function() toggle_solo("n", "terminal alot",  "alot")         end, { silent = true })
+vim.keymap.set("n", "m", function() toggle_solo("m", "terminal alot",  "alot")         end, { silent = true })
 vim.keymap.set("n", "g", function() toggle_solo("g", "terminal khal interactive", "khal") end, { silent = true })
 vim.keymap.set("n", "f", function() toggle_solo("f", "terminal abook", "abook")        end, { silent = true })