feat(capa): allow overdue CAPAs to be acted on, fix owner page stats

- CapaOwnerActions: add 'overdue' to open/reopened branch so DB-overdue
  CAPAs show 'Mark In Progress' button (cron transitions open→overdue)
- capa-owner page: compute overdue at runtime (dueDate < today) so stats
  and red highlight are correct even before cron runs
- openCount now excludes overdue items to avoid double-counting
- Add CapaOwnerActions test suite covering all status transitions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HEYxFQiCyxJvnBCoZeYzB9

tests/components/capa/capa-owner-actions.test.tsx

@@ -0,0 +1,40 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { render, screen } from '@testing-library/react'
+import { CapaOwnerActions } from '@/components/capa/capa-owner-actions'
+
+// Mock Next.js router
+vi.mock('next/navigation', () => ({
+  useRouter: () => ({ refresh: vi.fn() }),
+}))
+
+describe('CapaOwnerActions', () => {
+  it('shows Mark In Progress for open status', () => {
+    render(<CapaOwnerActions capaId="abc" currentStatus="open" />)
+    expect(screen.getByText('Mark In Progress')).toBeTruthy()
+  })
+
+  it('shows Mark In Progress for reopened status', () => {
+    render(<CapaOwnerActions capaId="abc" currentStatus="reopened" />)
+    expect(screen.getByText('Mark In Progress')).toBeTruthy()
+  })
+
+  it('shows Mark In Progress for overdue status', () => {
+    render(<CapaOwnerActions capaId="abc" currentStatus="overdue" />)
+    expect(screen.getByText('Mark In Progress')).toBeTruthy()
+  })
+
+  it('shows Submit for Verification for in_progress status', () => {
+    render(<CapaOwnerActions capaId="abc" currentStatus="in_progress" />)
+    expect(screen.getByText('Submit for Verification')).toBeTruthy()
+  })
+
+  it('renders nothing for pending_verification status', () => {
+    const { container } = render(<CapaOwnerActions capaId="abc" currentStatus="pending_verification" />)
+    expect(container.firstChild).toBeNull()
+  })
+
+  it('renders nothing for verified status', () => {
+    const { container } = render(<CapaOwnerActions capaId="abc" currentStatus="verified" />)
+    expect(container.firstChild).toBeNull()
+  })
+})