The catch-all renderer was dumping raw JSON (in loud orange) for
claude's system events like api_retry — producing noise like:
! {"attempt":1,"error":"unknown","subtype":"api_retry",...}
Replace the single 'init' filter with a full system-event block:
- api_retry → muted note: '⚠ api retry 1/10 · unknown · 502ms'
- api_error → amber note: '✗ api error · <message>'
- other subtypes (context_window_exceeded, etc.) → '⚙ <subtype>'
The loud orange sys catch-all is now reserved for truly unrecognised
top-level event types, not routine operational noise.
bddeb5478e