test: comprehensive integration tests for all API endpoints
Replace the existing integration test suite with a complete test covering
every registered API route. Tests use httptest with the real router and
a real DB connection (youpc.org mgmt schema).
Endpoint groups tested:
- Health, Auth (JWT validation, expired/invalid/wrong-secret)
- Current user (GET /api/me)
- Tenants (CRUD, auto-assign)
- Cases (CRUD with search/status filters)
- Parties (CRUD)
- Deadlines (CRUD, complete, batch create)
- Appointments (CRUD)
- Notes (CRUD)
- Dashboard
- Proceeding types & deadline rules
- Deadline calculator & determination (timeline, determine)
- Reports (cases, deadlines, workload, billing)
- Templates (CRUD, render)
- Time entries (CRUD, summary)
- Invoices (CRUD, status update)
- Billing rates (list, upsert)
- Notifications (list, unread count, mark read, preferences)
- Audit log (list, filtered)
- Case assignments (assign, unassign)
- Documents (list, meta)
- AI endpoints (availability check)
- Critical path E2E (case -> deadline -> appointment -> note -> time entry -> dashboard -> complete)
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