Drives the report/export parts of src/routes/admin.ts to 100%
stmts/branch/funcs/lines. Adds one lifecycle test plus gap tests for the
previously-uncovered branches; no production behavior changed.
Tests added (apps/api/test):
- report.test.ts: invalid insole_type / non-numeric activity_id → 400;
activity filter narrows; null insole_type bucketed "Onbekend"; null
duration counts as 0 worked; export 400 on missing/inverted range.
Migrated the report + export describes to resetDb(beforeEach) so exact
totals are order-independent (removed the activity_id isolation
workaround in the all-users export test).
- integration/report-aggregation.test.ts: lifecycle — 2 workers × 2
activities × 2 types → exact totals + every by_worker/by_activity/
by_type row (values and worked-desc order) → user_id filter narrows.
Defensive annotations in admin.ts report loop (behavior unchanged):
- pausedSeconds/pairCount ?? 0 — NOT NULL columns, DB-impossible nulls.
- user_name/activity_name ?? 'Onbekend' — unreachable; userId FK cascades
on delete and activityId FK is enforced (libsql enforces FKs), so every
session always joins to a real user and activity.
No bugs found; the code was already correct.
