Sidekick ergonomics: float toggle, zoom, escape, yank-joined

[GuillaumeLagrange]

Summary

Quality-of-life tweaks for the folke/sidekick.nvim workflow, plus a small visual-mode yank helper.

nvim/plugin/ai.lua

• Esc / Esc-Esc in sidekick terminal buffer only: added cli.win.keys entries (stopinsert, stopinsert2) so <esc> and <esc><esc> both stopinsert in the sidekick CLI window without clobbering the global terminal <esc> mapping.
• <leader>aF — toggle the sidekick CLI between a 95%/95% float and the default right split (mode n/t).
• <leader>az — Snacks.zoom() toggle (snacks.nvim is already a dep via nvim/plugin/snacks.lua), mode n/t.

nvim/lua/keymaps.lua

• <leader>yj in visual mode — yanks the selection, collapses all internal whitespace/newlines into single spaces, trims, and writes the result to the + register. Notifies with the resulting char count.

Layout notes

This repo uses vim.pack (not lazy.nvim). The lazy-style keys = { … } and opts.cli.win.keys blocks from the task description were adapted into the existing setup() call and vim.keymap.set calls in nvim/plugin/ai.lua.

Manual step (Claude Code config not tracked here)

This repo does not track any claude/ or .claude/ directory, so keybindings.json was not added.

In the Chat context, only one action is bound to escape by default: chat:cancel (cancels the current request/input). To move it off escape — so Neovim's terminal-mode <esc> from this PR can pass through cleanly — drop the following at ~/.claude/keybindings.json:

{
  "$schema": "https://www.schemastore.org/claude-code-keybindings.json",
  "bindings": [
    {
      "context": "Chat",
      "bindings": {
        "ctrl+shift+c": "chat:cancel",
        "escape": null
      }
    }
  ]
}

Notes:

• The other default escape bindings (autocomplete:dismiss, help:dismiss, confirm:no) live in other contexts and are unaffected.
• An action can be bound to multiple keys — to keep escape working and add a second key, drop the "escape": null line.
• Reference: https://code.claude.com/docs/en/keybindings

Validation

• luajit -bl parses both nvim/plugin/ai.lua and nvim/lua/keymaps.lua cleanly (Neovim not installed in this environment, so the nvim --headless runtime check was substituted with a Lua syntax check).

Test plan

• In a sidekick CLI window, <esc> exits terminal insert mode (and only there).
• <leader>aF toggles between float (95%×95%) and right split.
• <leader>az zooms the current window via Snacks.zoom(); pressing again unzooms.
• In visual mode, <leader>yj puts a single-line, whitespace-collapsed copy of the selection into the system clipboard and notifies with the char count.