docs(docs): expand terminal and tmux documentation with launch commands, prompts, persistence, and keybinding updates

docs/shell/starship.mdx

@@ -17,10 +17,12 @@ The file is not a template and applies on every role. `starship` is in `.chezmoi
 | --- | --- |
 | fish | `conf.d/40-tools.fish` runs `starship init fish`, then `config.fish` runs it again and calls `enable_transience` |
 | bash | `eval "$(starship init bash)"` in `~/.bashrc` |
-| zsh | `eval "$(starship init zsh)"` in `~/.zshrc` |
+| zsh | `eval "$(starship init zsh)"` in `~/.zshrc`, plus a transient-prompt hook |
 
 With transience in fish, past prompts in the scrollback collapse to the output of `starship_transient_prompt_func` (`starship module character`, the `❯` alone) and `starship_transient_rprompt_func` (`starship module time`). See [fish](/shell/fish#configfish).
 
+zsh has no built-in transience, so `~/.zshrc` collapses past prompts itself, rendering the `transient` (`$character`) and `transient_right` (`$time`) entries under `[profiles]` with `starship prompt --profile`. It uses profiles rather than `starship module` because only `starship prompt` wraps color escapes in zsh's `%{…%}`; without them zsh miscounts the right prompt's width. zsh also gets starship's default `∙` continuation prompt (`PROMPT2`). See [bash and zsh](/shell/bash-zsh#zshrc).
+
 ## Layout
 
 ```toml ~/.config/starship.toml