рефакторинг(zsh): улучшить стабильность Zsh при запуске

*   Добавлены проверки минимальной версии Zsh для повышения надежности
*   Оптимизирована логика загрузки Powerlevel10k
*   Внедрена быстрая проверка Starship

05-start.zsh

@@ -6,6 +6,10 @@
 # Initialization code that may require console input
 # (password prompts, [y/n] confirmations, etc.)
 # must go above this block; everything else may go below.
+
+! is-at-least 5.8 && return
+command -v starship >/dev/null && return
+
 if [ -r "${XDG_CACHE_HOME}/p10k-instant-prompt-${(%):-%n}.zsh" ]; then
   source "${XDG_CACHE_HOME}/p10k-instant-prompt-${(%):-%n}.zsh"
 fi

88-prompt.zsh

@@ -1,25 +1,26 @@
 # shellcheck shell=bash
 # vim: ft=sh
 
+if ! is-at-least 5.8; then
+	zinit light agkozak/agkozak-zsh-prompt
+	return
+fi
+
 if command -v starship >/dev/null; then
 	eval "$(starship init zsh)"
 	return
 fi
 
-if is-at-least 5.3; then
-	zinit ice depth"1" # git clone depth
-	zinit light romkatv/powerlevel10k
+zinit  ice depth"1" # git clone depth
+zinit  light romkatv/powerlevel10k
 
-	# To customize prompt, run `p10k configure` or edit ~/.config/zsh/.p10k.zsh.
-	if [[ -r "$ZDOTDIR/.p10k.user.zsh" ]]; then
-		source "$ZDOTDIR/.p10k.user.zsh"
-	else
-		if [[ "$TERM" = "xterm" ]]; then
-			[[ -r "$ZDOTDIR/.p10k.8colors.zsh" ]] && source "$ZDOTDIR/.p10k.8colors.zsh"
-		else
-			[[ -r "$ZDOTDIR/.p10k.zsh" ]] && source "$ZDOTDIR/.p10k.zsh"
-		fi
-	fi
+# To customize prompt, run `p10k configure` or edit ~/.config/zsh/.p10k.zsh.
+if  [[ -r "$ZDOTDIR/.p10k.user.zsh" ]]; then
+	source "$ZDOTDIR/.p10k.user.zsh"
 else
-	zinit light agkozak/agkozak-zsh-prompt
+	if [[ "$TERM" = "xterm" ]]; then
+		[[ -r "$ZDOTDIR/.p10k.8colors.zsh" ]] && source "$ZDOTDIR/.p10k.8colors.zsh"
+	else
+		[[ -r "$ZDOTDIR/.p10k.zsh" ]] && source "$ZDOTDIR/.p10k.zsh"
+	fi
 fi