- Add tests for sanitizer, mime_to_ext, clean_tags, Theme::toggle
- Tighten assertions in highlight, markdown, post status classes
- Add boundary and XSS cases for comments, slug, rate_limit, webp
- Update Cargo.lock for serial_test dev-dependency
clean_html() triggers expensive ammonia sanitization with aho_corasick.
Previously called twice for the same text (aria-label + display text).
Now calls once and reuses the result.
- Cache ammonia::Builder with LazyLock (was rebuilt per request)
- Enable tracing release_max_level_info to strip tracing overhead at compile time
- Remove TraceLayer and tower-http trace feature from production
- Increase DB pool size 10→20 (configurable via DB_POOL_SIZE)
- Increase SSR cache TTL 300s→3600s (configurable via SSR_CACHE_SECS)
Benchmark: 7,444 → 9,840 req/s, P99 latency 27.6ms → 11.1ms
ammonia's default url_schemes whitelist excludes 'data', causing
data:image/* URLs to be stripped from img src attributes. Add 'data'
to allowed schemes. Also skip data: URIs in JS thumbnail logic.
