fix: dynamic flake path resolution and replace env-update/sys-update aliases with scripts

themes/engine/switcher.nix

@@ -26,7 +26,7 @@ let
     if [ -n "$SELECTED_FONT" ]; then
       TMP_JSON=$(mktemp)
       jq --arg font "$SELECTED_FONT" '.font = $font' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
-      env-update
+      nomarchy-env-update
     fi
   '';
 
@@ -55,7 +55,7 @@ let
       TMP_JSON=$(mktemp)
       jq --arg wp "$SELECTED_WP" '.wallpaper = $wp' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
       swww img "$SELECTED_WP" --transition-type outer --transition-pos 0.85,0.97 --transition-step 90 &
-      env-update
+      nomarchy-env-update
     fi
   '';
 in