feat: add BreadcrumbProvider and e2e test suite

Add BreadcrumbProvider context so pages can override TopBar breadcrumbs
dynamically. Add Playwright e2e tests for dashboard, agents, routes,
exchanges, and admin pages.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

e2e/dashboard.spec.ts

@@ -0,0 +1,90 @@
+import { test, expect } from '@playwright/test'
+
+/** Click the 7d time range preset so hardcoded mock data (March 18) is visible. */
+async function widenTimeRange(page: import('@playwright/test').Page) {
+  await page.getByRole('tab', { name: '7d' }).click()
+}
+
+test.describe('Dashboard (/apps)', () => {
+  test('renders KPI stat cards and exchange table', async ({ page }) => {
+    await page.goto('/apps')
+    await widenTimeRange(page)
+
+    // KPI health strip renders
+    await expect(page.getByText('Recent Exchanges')).toBeVisible()
+
+    // Table headers
+    await expect(page.getByRole('columnheader', { name: 'Status' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Route' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Application' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Exchange ID' })).toBeVisible()
+
+    // Table has data rows
+    const rows = page.locator('table tbody tr')
+    await expect(rows.first()).toBeVisible()
+    expect(await rows.count()).toBeGreaterThan(0)
+
+    // Sidebar renders with app names
+    await expect(page.getByText('order-service').first()).toBeVisible()
+    await expect(page.getByText('payment-svc').first()).toBeVisible()
+
+    // TopBar renders
+    await expect(page.getByLabel('Breadcrumb').getByText('Applications')).toBeVisible()
+    await expect(page.getByText('PRODUCTION')).toBeVisible()
+
+    // Shortcuts bar
+    await expect(page.getByText('Ctrl+K').first()).toBeVisible()
+  })
+
+  test('clicking a table row opens the detail panel', async ({ page }) => {
+    await page.goto('/apps')
+    await widenTimeRange(page)
+
+    // Click the first data row
+    const firstRow = page.locator('table tbody tr').first()
+    await expect(firstRow).toBeVisible()
+    await firstRow.click()
+
+    // Detail panel should open — look for "Open full details" link
+    await expect(page.getByText('Open full details')).toBeVisible()
+    // Overview section
+    await expect(page.getByText('Correlation').first()).toBeVisible()
+  })
+
+  test('navigating to app-scoped dashboard filters exchanges', async ({ page }) => {
+    await page.goto('/apps/order-service')
+
+    // Breadcrumb shows app scope
+    await expect(page.getByLabel('Breadcrumb').getByText('order-service')).toBeVisible()
+
+    // Table should still render
+    await expect(page.getByText('Recent Exchanges')).toBeVisible()
+  })
+
+  test('sidebar navigation works', async ({ page }) => {
+    await page.goto('/apps')
+
+    // Click on an app in the sidebar
+    const sidebarApp = page.getByText('order-service').first()
+    await sidebarApp.click()
+
+    // URL should change to the app scope
+    await expect(page).toHaveURL(/\/apps\/order-service/)
+  })
+
+  test('inspect button navigates to exchange detail', async ({ page }) => {
+    await page.goto('/apps')
+    await widenTimeRange(page)
+
+    // Wait for table rows to appear
+    const firstRow = page.locator('table tbody tr').first()
+    await expect(firstRow).toBeVisible()
+
+    // Click the inspect button (↗) on first row
+    const inspectBtn = firstRow.locator('button[title="Inspect exchange"]')
+    await inspectBtn.click()
+
+    // Should navigate to exchange detail page
+    await expect(page).toHaveURL(/\/exchanges\//)
+  })
+})