New Features: reorder sections by dragging, and start segment on Enter key

[bastibe-muetec]

Thank you very much for your super simple time tracker. It does exactly what I needed, and is beautifully executed!

However, there were two features I have wanted since I started using the plugin two years ago:

• a faster way of starting segments, and
• the ability to reorder segments.

Reordering is useful when I forgot a segment in the middle somewhere. In the past, I'd copy a line in the source block, and then edit the line. But reordering is easier, I can just add the segment like any other, and then move it to the right place.

To implement these two features, the "new segment" text box now starts the segment on Enter. And segments can now be reordered by dragging-and-dropping. To that end, I inserted a little invisible drag handle to the left margin of each segment that only becomes visible on hover. Only the drag handle drags, the rest of the line remains editable as usual. Here's a screenshot where my mouse is hovering over the highlighted line:

Admittedly, and explicitly, these changes were written by Claude. I've tried in the past to change the super simple time tracker on my own, but typescript, web-dev, and node in particular were too much for me, so I gave up on it. For what it's worth, the code changes do look reasonable to me, and I've been running them locally without issue, so this was not a completely hands-off vibe code.

Once again, thank you for your plugin, I use it daily, and find it tremendously useful and well-designed!

[Ellpeck]

I love this idea! Unfortunately, I don't generally accept AI-generated content into any of my projects, and i've finally gotten around to writing a proper policy on this. Because of that, I'll be closing this pull request, but please feel free to reformulate the idea into a new issue, where you mention/link this PR for reference :)

[bastibe-muetec]

I understand, that's why I labeled it explicitly as LLM-generated. I'll open an issue.