chore(config): update terminal, tmux, and starship configurations

dot_config/starship.toml

@@ -17,6 +17,12 @@ add_newline = true
 
 right_format = """$time"""
 
+# zsh transient prompt (~/.zshrc). `starship prompt --profile` emits
+# zsh-escaped output; `starship module` doesn't, which breaks RPROMPT width.
+[profiles]
+transient = "$character"
+transient_right = "$time"
+
 [directory]
 style = "blue"