Fix home page story card — move author inside moleskine, add plot count badge

[realproject7]

Summary

After the profile page work, the author name was moved outside the moleskine shape on the home page story cards (to make it clickable as a link to /profile). This made the bottom content three lines and looks cluttered.

Changes

1. Move author name back inside the moleskine shape — it can still be a clickable link inside the card
2. Move plot count inside the moleskine shape as a small badge, similar to the genre tag style — e.g. `[2 plots]` as a compact tag in the bottom area of the notebook
3. Keep the bottom section outside the moleskine clean and minimal

Acceptance Criteria

• Author name displayed inside the moleskine card (still clickable to profile)
• Plot count shown as a compact badge inside the moleskine (e.g. `[2 plots]`)
• Bottom area outside moleskine is no longer three lines
• Genre tag positioning preserved