Trending articles section #117
Description
Show trending articles on the homepage and/or sidebar based on recent engagement (views + reactions + bookmarks in the last 7 days).
Context: Discovery is a key writer incentive — if good articles surface prominently, writers are motivated to publish quality content.
Acceptance criteria:
- Trending score = weighted sum of views + reactions + bookmarks in last 7 days
- Section visible on homepage
- Refreshes at least daily