Navigation & Discovery: tag pages, archives, related posts

[x3ek]

Summary

Add navigation features to help readers discover and browse content.

Features

1. Tag Pages

• Route: /tags/{tag} - lists all posts with that tag
• Route: /tags - index of all tags with post counts
• Reuse posts list template with tag filter

Example:

/tags/cooking     → All posts tagged "cooking"
/tags             → cooking (3), python (5), aliens (2)

2. Archive Page

• Route: /archive - all posts grouped by year/month
• Compact list view (title + date, no excerpts)

Example:

2026
  January
    - Grandma's Intergalactic Gumbo (Jan 24)
    - Hello World (Jan 15)
2025
  December
    - Year in Review (Dec 31)

3. Related Posts

• Show 3-5 related posts at bottom of post page
• Algorithm: posts sharing the most tags
• Fallback: recent posts if no tag overlap
• Available as {{ related_posts }} in post template

Implementation Notes

• Tag pages need a new router (routers/tags.py)
• Archive can be a page template with all posts passed in
• Related posts calculated in post router, passed to template

Templates Needed

• tags.html - tag index
• tag.html - single tag listing
• archive.html - archive page
• Update post.html - related posts section