- Active tab refreshes every 10s, badge counting every 30s (was double-loading all tabs every 10s)
- DM filter fallback: old posts without intentKind filtered from Feed/My Posts using legacy encrypted-for-me check
- Removed duplicate feed/myposts loading that caused CPU exhaustion on WebKitGTK
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>