chore: v0.5.2 — bump version + CHANGELOG entry

Hotfix for v0.5.1's BAGeL/PopTron slug mistake. Same deferred-from-
Web-Store pattern as v0.5.1 — bundle ships only after v0.5.0 clears.

CHANGELOG.md

@@ -16,6 +16,34 @@ Format: [Keep a Changelog 1.1.0](https://keepachangelog.com/en/1.1.0/) — versi
 
 ---
 
+## [0.5.2] — 2026-06-10 — Quick Stations fix: replace retired BAGeL with PopTron
+
+Hotfix for v0.5.1's Quick Stations row. David flagged: *"the stations still look a bit off"* — turned out only 13 chips were rendering instead of the intended 14. Investigation showed **BAGeL Radio has been retired from SomaFM's current `channels.json` catalogue** — the render loop's "drop missing slugs silently" behaviour (working as designed) made the chip just disappear.
+
+### Changed
+
+- `src/newtab/newtab.js` `QUICK_IDS` array: `'bagel'` → `'poptron'`. PopTron (alternative / alt-rock) fills the same indie/alt-rock genre slot BAGeL covered, and is currently a live SomaFM channel.
+
+### Result
+
+14 chips visible again. Layout reads cleaner — 6+6+2 instead of 6+6+1 (ThistleRadio no longer alone on its own row).
+
+### No other change
+
+- No CSS, no permissions, no dependencies, no behaviour change
+- Single one-line edit in `QUICK_IDS`
+- Still held from Chrome Web Store upload until v0.5.0 clears re-review
+
+### Lesson — SomaFM channel catalogue is mutable
+
+Channels can be retired at any time. The render loop's "drop missing slugs silently" pattern protects against this, but the developer-side responsibility is to verify slugs against the live `channels.json` before adding to QUICK_IDS:
+
+```bash
+curl -s https://somafm.com/channels.json | python3 -c "import json,sys; print([c['id'] for c in json.load(sys.stdin)['channels']])"
+```
+
+---
+
 ## [0.5.1] — 2026-06-10 — Quick Stations expansion (8 → 14)
 
 Third update of the day. **Tagged on Gitea but held from Chrome Web Store upload until v0.5.0 clears re-review** — we want the v0.5.0 features (light mode + theme toggle + back-link + first-run UX hint) landing in users' browsers before this stations expansion piles on top.