## Summary
This PR fixes Sentry issue COMPILER-EXPLORER-BFA which has generated
over 33,000 occurrences of non-actionable error reports.
## Problem
The issue occurs when jQuery `.get()` requests fail with `readyState: 0`
and `status: 0`, which typically indicates:
- Ad blockers blocking requests to static assets (icons.html,
sponsors.html)
- Network connectivity issues
- Browser security policies
- User navigating away during request
These network-level failures are not application bugs and create noise
in Sentry monitoring.
## Solution
- Filter out network failures (`readyState === 0 && status === 0`)
before sending to Sentry
- Only capture actual server errors (`status >= 400`) for debugging
- Log network failures to console for debugging instead
- For sponsors.html specifically, silently fail on network issues per
request
## Test Plan
- [x] TypeScript compilation passes
- [x] All tests pass
- [x] Pre-commit hooks complete successfully
- Verified logic handles both network failures and real server errors
appropriately
🤖 Generated with [Claude Code](https://claude.ai/code)
2e91e7dec8