web: review fixes for projects/stats SPA routes
- ProjectsTable: drop the inner navigate call from handleOpen;
the parent route already navigates via the onOpen callback,
so the second push was creating a duplicate history entry
on every row click. Matches the SessionsTable pattern.
- HorizontalBars: replace href:string with onActivate(row)
callback. The earlier shape passed a pre-encoded path
string straight into TanStack <Link to={...}>; routing the
navigation through the typed (to, params) form via the
caller avoids any double-encoding ambiguity around splat
params and decouples the primitive from a specific route.
- stats.css: drop duplicated .card / .card-head / .card-body
blocks. The same rules already live in shell.css (loaded
globally), so any future divergence between the two copies
would silently desync.