- collapse chapters/sections via styled <details> with chevrons - identity testcontainers smoke passes on JDK 21 - README: student UX, comments, JDK note (logback ThrowableProxy in fat-jars → restart recovery), data dirs
- collapse chapters/sections via styled <details> with chevrons - identity testcontainers smoke passes on JDK 21 - README: student UX, comments, JDK note (logback ThrowableProxy in fat-jars → restart recovery), data dirs