- 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
Replace scattered ServerFnError::new("...") inline calls and utils.rs
helper functions with a single AppError enum that provides:
- Automatic tracing::error logging for system errors
- Safe generic messages to frontend (no SQL/connection detail leaks)
- Typed error variants (Unauthorized, Forbidden, NotFound, etc.)
- 5 unit tests for message passthrough and detail hiding
Removes src/api/utils.rs entirely; all error creation now goes through
src/api/error.rs.
