feat(nvim): add PIM panel with calendar, alot mail, and abook

Adds itchyny/calendar.vim plugin and keybinds for a PIM sidebar:
- r: full-screen tab with alot (top), calendar + abook (bottom split)
- n/g/f: individual vsplit toggles for alot, calendar, abook
- Restores <C-hjkl> window nav inside calendar buffers
- shell-setup.sh installs notmuch, alot, abook (AUR) and syncs lazy.nvim

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nvim/init.lua

@@ -37,6 +37,7 @@ require("lazy").setup({
     "nvim-mini/mini.icons",
     "tadmccorkle/markdown.nvim",
     { "ellisonleao/glow.nvim", config = true },
+    "itchyny/calendar.vim",
     {
         "greggh/claude-code.nvim",
         dependencies = { "nvim-lua/plenary.nvim" },
@@ -92,6 +93,18 @@ vim.keymap.set("n", "<C-h>", "<C-w>h")
 vim.keymap.set("n", "<C-j>", "<C-w>j")
 vim.keymap.set("n", "<C-k>", "<C-w>k")
 
+-- calendar.vim steals <C-hjkl> for month nav; restore window movement
+vim.api.nvim_create_autocmd("FileType", {
+    pattern = "calendar",
+    callback = function()
+        local o = { buffer = true, silent = true }
+        vim.keymap.set("n", "<C-l>", "<C-w>w", o)
+        vim.keymap.set("n", "<C-h>", "<C-w>h", o)
+        vim.keymap.set("n", "<C-j>", "<C-w>j", o)
+        vim.keymap.set("n", "<C-k>", "<C-w>k", o)
+    end,
+})
+
 -- quick actions
 vim.keymap.set("n", "t", ":FloatermNew<CR>",    { silent = true })
 vim.keymap.set("n", "e", ":NERDTreeToggle<CR><C-W>l", { silent = true })
@@ -145,3 +158,80 @@ end, { expr = true, silent = true })
 vim.keymap.set("i", "<CR>", function()
     return vim.fn["coc#pum#visible"]() == 1 and vim.fn["coc#pum#confirm"]() or "<CR>"
 end, { expr = true, silent = true })
+
+-- ── PIM sidebar (calendar / notmuch / abook) ──────────────────────────────────
+local function _pim_scratch(label, err)
+    vim.cmd("enew")
+    vim.bo.buftype   = "nofile"
+    vim.bo.buflisted = false
+    vim.api.nvim_buf_set_lines(0, 0, -1, false, { "[" .. label .. " unavailable]", "", err or "" })
+end
+
+local function _pim_close_win(win)
+    if not vim.api.nvim_win_is_valid(win) then return end
+    local buf = vim.api.nvim_win_get_buf(win)
+    vim.api.nvim_win_close(win, true)
+    if vim.api.nvim_buf_is_valid(buf) and vim.bo[buf].buftype == "terminal" then
+        pcall(vim.api.nvim_buf_delete, buf, { force = true })
+    end
+end
+
+-- individual toggles: n = notmuch/alot, g = calendar, f = find/abook
+local _solo = {}
+
+local function toggle_solo(key, cmd, label, width)
+    local win = _solo[key]
+    if win and vim.api.nvim_win_is_valid(win) then
+        _pim_close_win(win)
+        _solo[key] = nil
+    else
+        local prev = vim.api.nvim_get_current_win()
+        vim.cmd("topleft vsplit")
+        vim.api.nvim_win_set_width(0, width)
+        local ok, err = pcall(vim.cmd, cmd)
+        if not ok then _pim_scratch(label, err) end
+        _solo[key] = vim.api.nvim_get_current_win()
+        vim.api.nvim_set_current_win(prev)
+    end
+end
+
+vim.keymap.set("n", "n", function() toggle_solo("n", "terminal alot",  "alot",         55) end, { silent = true })
+vim.keymap.set("n", "g", function() toggle_solo("g", "Calendar",       "calendar.vim", 35) end, { silent = true })
+vim.keymap.set("n", "f", function() toggle_solo("f", "terminal abook", "abook",        80) end, { silent = true })
+
+-- r = full-screen PIM tab (mail top, calendar bottom-left, abook bottom-right)
+local _pim_tab = nil
+
+local function toggle_pim()
+    if _pim_tab and vim.api.nvim_tabpage_is_valid(_pim_tab) then
+        vim.cmd("tabclose " .. vim.api.nvim_tabpage_get_number(_pim_tab))
+        _pim_tab = nil
+        return
+    end
+
+    vim.cmd("tabnew")
+    _pim_tab = vim.api.nvim_get_current_tabpage()
+
+    -- top pane: alot (mail), full width
+    local ok, err = pcall(vim.cmd, "terminal alot")
+    if not ok then _pim_scratch("alot", err) end
+
+    -- split bottom third for calendar + abook
+    vim.cmd("belowright split")
+    vim.cmd("resize 24")
+
+    -- bottom-left: calendar
+    vim.cmd("leftabove vsplit")
+    ok, err = pcall(vim.cmd, "Calendar")
+    if not ok then _pim_scratch("calendar.vim", err) end
+
+    -- bottom-right: abook
+    vim.cmd("wincmd l")
+    ok, err = pcall(vim.cmd, "terminal abook")
+    if not ok then _pim_scratch("abook", err) end
+
+    -- focus mail
+    vim.cmd("wincmd k")
+end
+
+vim.keymap.set("n", "r", toggle_pim, { silent = true })

setup/modules/shell-setup.sh

@@ -6,7 +6,7 @@ log "Updating system..."
 sudo pacman -Syu --noconfirm
 
 log "Installing base shell packages..."
-PACKAGES=(zsh neovim curl pyright bash atftp bash-language-server btop clang fastfetch fzf hyfetch lua-language-server micro nano pulsemixer yazi z qrencode distrobox dysk python python-pip glow)
+PACKAGES=(zsh neovim curl pyright bash atftp bash-language-server btop clang fastfetch fzf hyfetch lua-language-server micro nano pulsemixer yazi z qrencode distrobox dysk python python-pip glow notmuch alot)
 for pkg in "${PACKAGES[@]}"; do
     if ! pacman -Qi "$pkg" &>/dev/null; then
         log "Installing $pkg..."
@@ -16,6 +16,14 @@ for pkg in "${PACKAGES[@]}"; do
     fi
 done
 
+# abook (AUR)
+if ! command -v abook &>/dev/null; then
+    log "Installing abook (AUR)..."
+    yay -S --noconfirm --needed abook
+else
+    skip "abook already installed."
+fi
+
 # yay
 if ! command -v yay &>/dev/null; then
     log "Installing yay..."
@@ -64,6 +72,9 @@ cp -r ~/Dotfiles/micro ~/.config/
 rm -rf ~/.config/nvim
 ln -sf ~/Dotfiles/nvim ~/.config/nvim
 
+log "Syncing neovim plugins (lazy.nvim)..."
+nvim --headless "+Lazy! sync" +qa 2>/dev/null || true
+
 rm -rf ~/.config/yazi
 ln -sf ~/Dotfiles/yazi ~/.config/yazi