zsh: fix zsh-vi-mode initialisation

modules/home-manager/shell/zsh/default.nix

@@ -43,6 +43,9 @@ in
         };
 
         initExtra = ''
+          ## Colors
+          autoload -U colors && colors
+
           ## Directories
           setopt AUTO_PUSHD
           setopt CDABLE_VARS
@@ -81,7 +84,6 @@ in
 
           ## Vi mode
           export KEYTIMEOUT=1
-          bindkey '^R' mcfly-history-widget
 
           ## Zsh line editor
           unsetopt BEEP
@@ -91,6 +93,10 @@ in
           setopt HASH_LIST_ALL
         '';
 
+        localVariables = {
+          ZVM_INIT_MODE = "sourcing";
+        };
+
         plugins = with pkgs; [
           {
             name = "zsh-vi-mode";