fix(nvim): C-h reaches tmux from snacks explorer

home/dot_config/nvim/lua/plugins/editor.lua

@@ -1,3 +1,28 @@
+-- <C-h> from the snacks.nvim Explorer can't reach the left tmux pane the way it
+-- does from a normal buffer. The Explorer is a split-layout picker with a hidden
+-- "root" window: vim-tmux-navigator's <C-h> runs `wincmd h`, lands in that root,
+-- and snacks bounces focus back into the editor with `wincmd l`. The window
+-- number changed, so the navigator concludes it moved within Neovim and never
+-- forwards to tmux. (<C-l/j/k> don't pass through the root, so they already work.)
+--
+-- Fix: rebind <C-h> on the picker list buffer to go straight to the left tmux
+-- pane, bypassing the bounced `wincmd h`. This attaches to every picker's list
+-- window, not just the Explorer — but that's harmless: from any list-window left
+-- edge the normal navigator would forward to tmux anyway, so the result matches.
+-- The augroup's clear=true keeps a re-source (`:Lazy reload`) from stacking
+-- duplicate autocmds (and thus duplicate buffer-local maps).
+vim.api.nvim_create_autocmd("FileType", {
+  group = vim.api.nvim_create_augroup("snacks_picker_tmux_nav", { clear = true }),
+  pattern = "snacks_picker_list",
+  callback = function(ev)
+    if vim.env.TMUX then
+      vim.keymap.set("n", "<C-h>", function()
+        vim.fn.system("tmux select-pane -L")
+      end, { buffer = ev.buf, desc = "Tmux navigate left (snacks picker list)" })
+    end
+  end,
+})
+
 return {
   -- Seamless C-h/j/k/l navigation across Neovim splits AND tmux panes.
   -- The tmux half lives in ~/.config/tmux/tmux.conf (inline bind-key lines).