add history fixup and support default and per-user nix profile

dot_config/zsh/dot_zshrc

@@ -67,6 +67,12 @@ if [[ -n "$WSL_DISTRO_NAME" ]]; then
     alias usbipd='usbipd.exe'
 fi
 
+fix_corrupt_history() {
+    mv "$HISTFILE" "$HISTFILE"_bad
+    strings "$HISTFILE"_bad > "$HISTFILE"
+    fc -R "$HISTFILE"
+}
+
 # GPG setup (and SSH)
 # SSH setup
 # I finally figured out how to export my id_rsa from GPG using
@@ -119,8 +125,10 @@ for plugin in zsh-syntax-highlighting zsh-history-substring-search zsh-autosugge
     possible_locations=(
         # Standard location
         "/usr/share/zsh/plugins/$plugin/$plugin.zsh"
-        # Nix
+        # Nix default profile
         "/nix/var/nix/profiles/default/share/$plugin/$plugin.zsh"
+        # Nix per-user profile
+        "$HOME/.nix-profile/share/$plugin/$plugin.zsh"
         # Direct in /usr/share
         "/usr/share/$plugin/$plugin.zsh"
         # Home directory locations