Revert "fix(zsh): indicate vi mode in prompt"

This reverts commit a194d840244f86a1a5dde20cb5fd9ab73a381a12.

zsh/prompt

@@ -1,7 +1,6 @@
 # vim: set ft=zsh:
 
 function _set_rprompt() {
-    # shellcheck disable=SC2154
     local -a _status=("${pipestatus[@]}")
     RPROMPT=""
 
@@ -49,8 +48,7 @@ setopt PROMPT_SUBST
 
 # https://zsh.sourceforge.io/Doc/Release/Parameters.html
 # https://zsh.sourceforge.io/Doc/Release/Prompt-Expansion.html
-# shellcheck disable=SC2016
-PROMPT='%(#.%F{red}.%12F)%n@%m%f %1~ ${VI_MODE_INDICATOR:-%(#.#.$)} '
+PROMPT='%(#.%F{red}.%12F)%n@%m%f %1~ %(#.#.$) '
 PROMPT_START=$'%{\e]133;A\a%}'
 PROMPT_END=$'%{\e]133;B\a%}'
 export PROMPT=${PROMPT_START}${PROMPT}${PROMPT_END}

zsh/rc

@@ -44,21 +44,18 @@ bindkey -a '_' vi-first-non-blank
 # shellcheck disable=SC2034
 zle_highlight=(region:bg=#323641)
 
-# Vi mode indicator in prompt
+# Change cursor shape based on vi mode
 function zle-keymap-select {
-    if [[ ${KEYMAP} == vicmd ]]; then
-        VI_MODE_INDICATOR="%F{yellow}N%f"
-    else
-        VI_MODE_INDICATOR=""
+    if [[ ${KEYMAP} == main ]]; then
+        echo -ne '\e[5 q'  # Beam cursor for insert mode
+    elif [[ ${KEYMAP} == vicmd ]]; then
+        echo -ne '\e[1 q'  # Block cursor for command mode
     fi
-    zle reset-prompt
 }
 zle -N zle-keymap-select
 
 function zle-line-init {
-    # shellcheck disable=SC2034
-    VI_MODE_INDICATOR=""
-    zle reset-prompt
+    echo -ne '\e[5 q'  # Beam cursor for insert mode
 }
 zle -N zle-line-init