docs(docs): update documentation to use cyberdream theme and remove noctalia references

docs/terminal/ghostty.mdx

@@ -11,7 +11,7 @@ Ghostty is only a [tmux](/terminal/tmux) client. tmux owns tabs (windows), split
 | Target | `~/.config/ghostty/` |
 | Install | Not listed in `.chezmoidata/packages.yaml`; install separately |
 
-Ghostty reads both `config` and `config.ghostty`. `config` holds all settings; `config.ghostty` contains a single line, `theme = noctalia`, which selects the active theme.
+Ghostty reads both `config` and `config.ghostty`. `config` holds all settings; `config.ghostty` contains a single line, `theme = cyberdream`, which selects the active theme.
 
 ## Options
 
@@ -29,17 +29,24 @@ Ghostty reads both `config` and `config.ghostty`. `config` holds all settings; `
 | `confirm-close-surface` | `false` |
 | `app-notifications` | `no-clipboard-copy,no-config-reload` |
 | `quit-after-last-window-closed` | `false`, delay `5m` |
-| `command` | `tmux new-session -A -s main`: every window attaches to tmux session `main` and creates it if it is missing |
+| `command` | `shell:$HOME/.local/bin/ghostty-tmux` (see [Sessions](#sessions)) |
 | `shell-integration` | `detect`, features `cursor,sudo,title,no-cursor` |
 | `gtk-single-instance` | `true` |
 
-## Persistence
+## Sessions
 
-Closing Ghostty only detaches from tmux; the shells keep running in the tmux server. Across reboots, tmux-continuum saves the layout every 10 minutes. When the first Ghostty window starts a new tmux server, continuum restores the last save. See [tmux](/terminal/tmux#persistence).
+Every Ghostty window gets its own tmux session; no two windows mirror the same one. `~/.local/bin/ghostty-tmux` (source `dot_local/bin/executable_ghostty-tmux`) runs for each new window:
+
+1. If a detached session exists (left by a closed window, or restored by continuum after a reboot), it attaches to the oldest one.
+2. Otherwise it starts a new session.
+
+Ghostty's colors match tmux's tab bar because both use the fixed cyberdream palette: Ghostty's background `#16181a` is tmux's `@tab-bg`.
+
+Closing a window only detaches its session; the shells keep running in the tmux server. In tmux, `detach-on-destroy no-detached` means killing a session moves the window to a *detached* session, or closes the window if there is none, so it never lands on another window's session. Across reboots, tmux-continuum saves every 10 minutes. The first Ghostty window starts the server, and that triggers continuum's restore. See [tmux](/terminal/tmux#persistence).
 
 ## Keybindings
 
-`keybind = clear` comes first and drops every Ghostty default: tabs, splits, `alt+N` goto_tab, and `ctrl+alt+arrow` goto_split. Those chords then reach tmux, which binds `alt+1…9` and `ctrl+alt+arrows` itself. Each `ctrl+shift` chord sends tmux's second prefix, `ctrl+b` (`\x02`), followed by a key.
+`keybind = clear` comes first and drops every Ghostty default: tabs, splits, `alt+N` goto_tab, and `ctrl+alt+arrow` goto_split. Those chords then reach tmux, which binds `alt+1…9` and `ctrl+alt+arrows` itself. `ctrl+h/j/k/l` also pass straight through to tmux's vim-aware pane navigation, which hands off to and from nvim's splits (see [tmux](/terminal/tmux#keybindings)). Each `ctrl+shift` chord sends tmux's second prefix, `ctrl+b` (`\x02`), followed by a key.
 
 | Key | Ghostty action |
 | --- | --- |
@@ -73,6 +80,6 @@ Closing Ghostty only detaches from tmux; the shells keep running in the tmux ser
 
 | Theme | Notes |
 | --- | --- |
-| `noctalia` | Active. Palette matching the Noctalia shell. |
+| `cyberdream` | Active. Upstream `extras/ghostty/cyberdream` from [cyberdream.nvim](https://github.com/scottmckendry/cyberdream.nvim), the palette shared with tmux, nvim, yazi, and television. |
 | `ii-auto` | Auto-generated by the ii wallpaper theming system; not meant to be edited. |
 | `koda-dark` / `koda-light` | Koda palettes with `bold-is-bright = true`. |