Add useNavigate + Launch icon to TreeItem; timetable section shows a
launch button routing to /my-lessons, classes section routes to /my-classes.
Both buttons only appear when the section status is populated.
Exclude classes section from the unlinked/pending icon fallback.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
kcar
9438e17f88