Tags you can read at a glance
Every tag on the site is now a white label with its word in full ink, as easy to read as the title next to it. Colour is down to one small dot, which is about all the colour a tag needs.

Fixes and improvements
- A use case's category leads with a dot: blue for operations, sunflower for content, ink for sales
- Its level leads with one, two or three bars: starter, intermediate, advanced
- Tool, model, skill and MCP server pages wear the same label on every tag, in both themes
- The version tags on the activity page and the lists on our work page match