Merge ticket/3-fun-section into feature/source-kinds (#3)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -216,6 +216,21 @@ Thing (applied AI), vendor blogs (OpenAI, DeepMind, Hugging Face) and Chip Huyen
 (inactive since January 2025). Some feeds are long (Dan Luu ~130 posts, Lilian
 Weng ~50); the 14-day window keeps the list short.
 
+## Fun sources
+
+Tech humour for the Fun section of the Learn tab, which reaches back 3 days. Fun
+articles never show up in Today or the Briefing. ★ = enabled by default.
+
+| | Source | Feed | Focus |
+|---|---|---|---|
+| 🇬🇧 ★ | xkcd | `xkcd.com/atom.xml` | Webcomic of romance, sarcasm, math and language |
+| 🇬🇧 ★ | The Daily WTF | `thedailywtf.com/rss` | IT horror stories, bad code and error messages |
+| 🇬🇧 | r/ProgrammerHumor | `reddit.com/r/ProgrammerHumor/top/.rss?t=day` | The day's top programming memes on Reddit |
+
+Reader view shows comics and memes whole instead of as a cropped banner: xkcd
+with its title text underneath, The Daily WTF's Error'd with its screenshots.
+Reddit blocks reader view, so a meme shows the picture from the feed.
+
 ## Project layout
 
 ```