Addresses three user-reported bugs:
- API 500 diagnosability: rethrowAsApiError now preserves the original error
as Error `cause` and the /api boundary logs stack + cause for 5xx, so the
opaque "task write API returns 500 for every task" failures are traceable
(client body stays generic in production).
- In-app "Update now": detect EACCES/EPERM install failures and return
actionable remediation (sudo fn update / reinstall without sudo / brew
upgrade) instead of raw npm stderr; do not retry --force for this class.
- Daemon restart: `fn daemon` and `fn serve` exit 128+signal (SIGTERM=143,
SIGINT=130) on signal-initiated shutdown so Restart=on-failure restarts a
memory-pressure kill. Interactive `fn dashboard` TUI intentionally unchanged.
Adds regression tests (update-check EACCES/EPERM, daemon exit codes) and three
@runfusion/fusion patch changesets.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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