The provided code seems fine and doesn't seem to contain significant irregularities, potential issues, or optimizations at this time since it's from an unspecified date (September 1, 2021) and is related to Vue.js.

However, I can recommend using lessCSS with SCSS if you're not yet familiar with its features. It provides better semantic styling compared to pure CSS. Here's a basic example:

.task-detail /deep/ .item-value span {
    white-space: nowrap; /* Prevents wrapping */
}

This simple piece of LESS/CSS helps control layout without resorting to awkward HTML elements like nowrap which can break cross-browser compatibility. However, make sure to replace <span>s by actual .tag, especially if some styles should still be applied across various browsers due to their browser-specific tags like display none.

As for improvements that need immediate attention based on the template syntax changes mentioned here, there appears no such urgent adjustments needed considering its structure. The current version does appear to work perfectly well as originally written.