Time entries
Start/stop or hand-entered minutes. Billable entries can be pushed to an order as a labor line.
Scaffolded, awaiting UI.
Data table time_entries exists in both D1 and IndexedDB and syncs
through /api/sync. To flesh out this screen, mirror the pattern
in src/routes/customers/: list page + [id]/ editor
using upsert() from $lib/db/mutations.