New feature: Dashboard view

The current compromise is the title is shown as hovertext. The way we do slugs vs titles is suboptimal but for now we really need to treat the slug as the canonical goal identifier. It’s complicated.

One thing I’m missing in this dashboard is a way to enter datapoint comments. We could solve this for power users by just accepting the full datapoint format in that text box (newbees would be none the wiser) but I feel like newbees should be encouraged to add comments too.

As for timestamp of last entry, maybe just a checkmark if data was entered today, like the goal gallery has.