fix: remove inset background from LogViewer container

LogViewer was using --bg-inset which created a visual mismatch with the
EventFeed timeline panel. Now inherits the parent card's background
(--bg-surface) for consistent appearance in side-by-side layouts.

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

.claude/settings.local.json

@@ -15,7 +15,21 @@
       "Bash(echo \"EXIT:$?\")",
       "Bash(bash \"C:\\\\Users\\\\Hendrik\\\\.claude\\\\plugins\\\\cache\\\\claude-plugins-official\\\\superpowers\\\\5.0.4\\\\scripts\\\\start-server.sh\" --project-dir \"C:\\\\Users\\\\Hendrik\\\\Documents\\\\projects\\\\design-system\")",
       "Bash(echo \"EXIT_CODE=$?\")",
-      "Bash(echo \"EXIT=$?\")"
+      "Bash(echo \"EXIT=$?\")",
+      "mcp__gitea__actions_config_read",
+      "mcp__gitea__search_repos",
+      "WebFetch(domain:raw.githubusercontent.com)",
+      "Bash(node -e \"console.log\\(JSON.parse\\(require\\(''fs''\\).readFileSync\\(''package.json'',''utf8''\\)\\).devDependencies[''vite-plugin-dts'']\\)\")",
+      "Bash(npx vite:*)",
+      "Bash(cd:*)",
+      "mcp__gitea__actions_run_read",
+      "mcp__gitea__get_file_contents",
+      "WebFetch(domain:ui.shadcn.com)",
+      "Bash(bash \"C:\\\\Users\\\\Hendrik\\\\.claude\\\\plugins\\\\cache\\\\claude-plugins-official\\\\superpowers\\\\5.0.5\\\\skills\\\\brainstorming\\\\scripts\\\\start-server.sh\" --project-dir \"C:\\\\Users\\\\Hendrik\\\\Documents\\\\projects\\\\design-system\")",
+      "Bash(bash \"C:/Users/Hendrik/.claude/plugins/cache/claude-plugins-official/superpowers/5.0.5/skills/brainstorming/scripts/stop-server.sh\" \"C:/Users/Hendrik/Documents/projects/design-system/.superpowers/brainstorm/470-1774344716\")",
+      "Bash(npm test:*)",
+      "Bash(grep:*)",
+      "Bash(xargs cat:*)"
     ]
   }
 }

.gitignore

@@ -2,3 +2,6 @@ node_modules/
 dist/
 .superpowers/
 .worktrees/
+test-results/
+screenshots/
+.playwright-mcp/

e2e/admin.spec.ts

@@ -0,0 +1,165 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('Admin - User Management (/admin/rbac)', () => {
+  test('renders admin tabs and user table', async ({ page }) => {
+    await page.goto('/admin/rbac')
+
+    // Admin navigation tabs
+    await expect(page.getByRole('tab', { name: 'User Management' })).toBeVisible()
+    await expect(page.getByRole('tab', { name: 'Audit Log' })).toBeVisible()
+    await expect(page.getByRole('tab', { name: 'OIDC' })).toBeVisible()
+
+    // User Management sub-tabs
+    await expect(page.getByRole('tab', { name: 'Users' })).toBeVisible()
+    await expect(page.getByRole('tab', { name: 'Groups' })).toBeVisible()
+    await expect(page.getByRole('tab', { name: 'Roles' })).toBeVisible()
+
+    // TopBar breadcrumb
+    await expect(page.getByLabel('Breadcrumb').getByText('User Management')).toBeVisible()
+  })
+
+  test('switching between Users, Groups, and Roles tabs', async ({ page }) => {
+    await page.goto('/admin/rbac')
+
+    // Default tab is Users
+    await expect(page.getByRole('tab', { name: 'Users' })).toBeVisible()
+
+    // Switch to Groups tab
+    await page.getByRole('tab', { name: 'Groups' }).click()
+    await page.waitForTimeout(300)
+
+    // Switch to Roles tab
+    await page.getByRole('tab', { name: 'Roles' }).click()
+    await page.waitForTimeout(300)
+
+    // Switch back to Users
+    await page.getByRole('tab', { name: 'Users' }).click()
+  })
+
+  test('navigating between admin sections via tabs', async ({ page }) => {
+    await page.goto('/admin/rbac')
+
+    // Click Audit Log tab
+    await page.getByRole('tab', { name: 'Audit Log' }).click()
+    await expect(page).toHaveURL(/\/admin\/audit/)
+
+    // Click OIDC tab
+    await page.getByRole('tab', { name: 'OIDC' }).click()
+    await expect(page).toHaveURL(/\/admin\/oidc/)
+
+    // Back to User Management
+    await page.getByRole('tab', { name: 'User Management' }).click()
+    await expect(page).toHaveURL(/\/admin\/rbac/)
+  })
+})
+
+test.describe('Admin - Audit Log (/admin/audit)', () => {
+  test('renders audit table with filters', async ({ page }) => {
+    await page.goto('/admin/audit')
+
+    // Table headers
+    await expect(page.getByRole('columnheader', { name: 'Timestamp' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'User' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Category' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Action' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Result' })).toBeVisible()
+
+    // Table has data
+    const rows = page.locator('table tbody tr')
+    expect(await rows.count()).toBeGreaterThan(0)
+
+    // Filter inputs exist
+    await expect(page.getByPlaceholder('Filter by user...')).toBeVisible()
+    await expect(page.getByPlaceholder('Search action or target...')).toBeVisible()
+  })
+
+  test('filtering audit events by search', async ({ page }) => {
+    await page.goto('/admin/audit')
+
+    const searchInput = page.getByPlaceholder('Search action or target...')
+    await searchInput.fill('deploy')
+
+    // Table should update
+    await page.waitForTimeout(300)
+    const rows = page.locator('table tbody tr')
+    const count = await rows.count()
+    expect(count).toBeGreaterThanOrEqual(0)
+  })
+})
+
+test.describe('Admin - OIDC Config (/admin/oidc)', () => {
+  test('renders OIDC form with all fields', async ({ page }) => {
+    await page.goto('/admin/oidc')
+
+    // Section headers
+    await expect(page.getByText('Behavior')).toBeVisible()
+    await expect(page.getByText('Provider Settings')).toBeVisible()
+    await expect(page.getByText('Claim Mapping')).toBeVisible()
+    await expect(page.getByText('Default Roles')).toBeVisible()
+    await expect(page.getByText('Danger Zone')).toBeVisible()
+
+    // Form fields by id
+    await expect(page.locator('#issuer')).toBeVisible()
+    await expect(page.locator('#client-id')).toBeVisible()
+    await expect(page.locator('#client-secret')).toBeVisible()
+    await expect(page.locator('#roles-claim')).toBeVisible()
+    await expect(page.locator('#name-claim')).toBeVisible()
+
+    // Buttons
+    await expect(page.getByRole('button', { name: 'Test Connection' })).toBeVisible()
+    await expect(page.getByRole('button', { name: 'Save' })).toBeVisible()
+    await expect(page.getByRole('button', { name: /Delete OIDC/i })).toBeVisible()
+
+    // Default roles tags
+    await expect(page.getByText('USER').first()).toBeVisible()
+    await expect(page.getByText('VIEWER').first()).toBeVisible()
+  })
+
+  test('toggling Enabled switch', async ({ page }) => {
+    await page.goto('/admin/oidc')
+
+    // The Toggle's checkbox is visually hidden — click the label wrapper instead
+    const enabledLabel = page.locator('label').filter({ hasText: 'Enabled' })
+    await enabledLabel.click()
+
+    // Should not crash; label still visible
+    await expect(enabledLabel).toBeVisible()
+  })
+
+  test('adding and removing a role tag', async ({ page }) => {
+    await page.goto('/admin/oidc')
+
+    // Add a new role
+    const roleInput = page.getByPlaceholder('Add role...')
+    await roleInput.fill('EDITOR')
+    // Use the Add button next to the input (scoped to same row)
+    await roleInput.press('Enter')
+
+    // New role tag should appear
+    await expect(page.getByText('EDITOR')).toBeVisible()
+
+    // Remove it via aria-label on the tag's remove button
+    await page.getByRole('button', { name: 'Remove EDITOR' }).click()
+
+    // EDITOR tag should be gone
+    await expect(page.getByText('EDITOR')).not.toBeVisible()
+  })
+
+  test('Save button shows success toast', async ({ page }) => {
+    await page.goto('/admin/oidc')
+
+    await page.getByRole('button', { name: 'Save' }).click()
+
+    // Toast notification
+    await expect(page.getByText('Settings saved')).toBeVisible()
+  })
+
+  test('Delete button shows confirmation dialog', async ({ page }) => {
+    await page.goto('/admin/oidc')
+
+    await page.getByRole('button', { name: /Delete OIDC/i }).click()
+
+    // Confirmation dialog should appear
+    await expect(page.getByText('Delete OIDC configuration?')).toBeVisible()
+  })
+})

e2e/agents.spec.ts

@@ -0,0 +1,80 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('Agent Health (/agents)', () => {
+  test('renders stat cards and group cards', async ({ page }) => {
+    await page.goto('/agents')
+
+    // Stat strip
+    await expect(page.getByText('Total Agents')).toBeVisible()
+    await expect(page.getByText('Total TPS')).toBeVisible()
+
+    // Group cards for each application
+    await expect(page.getByText('order-service').first()).toBeVisible()
+    await expect(page.getByText('payment-svc').first()).toBeVisible()
+    await expect(page.getByText('notification-hub').first()).toBeVisible()
+
+    // Instance tables have data
+    const instanceRows = page.locator('table tbody tr')
+    expect(await instanceRows.count()).toBeGreaterThan(0)
+
+    // Instance table headers
+    await expect(page.getByRole('columnheader', { name: 'Instance' }).first()).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'State' }).first()).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Uptime' }).first()).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'TPS' }).first()).toBeVisible()
+
+    // Timeline section
+    await expect(page.getByText('Timeline').first()).toBeVisible()
+  })
+
+  test('clicking an instance row opens the detail panel', async ({ page }) => {
+    await page.goto('/agents')
+
+    // Click first instance row
+    const instanceRow = page.locator('table tbody tr').first()
+    await instanceRow.click()
+
+    // Detail panel opens — look for detail-specific labels
+    await expect(page.getByText('Version').first()).toBeVisible()
+    await expect(page.getByText('Throughput').first()).toBeVisible()
+  })
+
+  test('detail panel has Performance tab with charts', async ({ page }) => {
+    await page.goto('/agents')
+
+    // Click an instance to open detail panel
+    const instanceRow = page.locator('table tbody tr').first()
+    await instanceRow.click()
+
+    // Wait for panel to open
+    await expect(page.getByText('Version').first()).toBeVisible()
+
+    // DetailPanel tabs are plain buttons (not role="tab")
+    // Switch to Performance tab
+    const perfTab = page.getByRole('button', { name: 'Performance' })
+    await perfTab.click()
+
+    // Performance charts should render
+    await expect(page.getByText('Throughput (msg/s)').first()).toBeVisible()
+    await expect(page.getByText('Error Rate (err/h)').first()).toBeVisible()
+  })
+
+  test('app-scoped agents view', async ({ page }) => {
+    await page.goto('/agents/order-service')
+
+    // Breadcrumb/scope shows app
+    await expect(page.getByLabel('Breadcrumb').getByText('Agents')).toBeVisible()
+
+    // Only order-service agents should show
+    await expect(page.getByText('ord-1').first()).toBeVisible()
+    await expect(page.getByText('ord-2').first()).toBeVisible()
+    await expect(page.getByText('ord-3').first()).toBeVisible()
+  })
+
+  test('dead agent shows alert banner', async ({ page }) => {
+    await page.goto('/agents')
+
+    // notification-hub has a dead instance, should show alert
+    await expect(page.getByText('Single point of failure')).toBeVisible()
+  })
+})

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\//)
+  })
+})

e2e/exchanges.spec.ts

@@ -0,0 +1,60 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('Exchange Detail (/exchanges/:id)', () => {
+  test('renders exchange header, timeline, and message panels', async ({ page }) => {
+    await page.goto('/exchanges/E-2026-03-18-00201')
+
+    // Exchange header — use the one NOT in the breadcrumb
+    await expect(page.getByText('E-2026-03-18-00201').nth(1)).toBeVisible()
+
+    // Header stats
+    await expect(page.getByText('Duration').first()).toBeVisible()
+    await expect(page.getByText('Processors').first()).toBeVisible()
+
+    // Processor Timeline section
+    await expect(page.getByText('Processor Timeline').first()).toBeVisible()
+
+    // Timeline/Flow toggle buttons
+    await expect(page.getByRole('button', { name: 'Timeline' })).toBeVisible()
+    await expect(page.getByRole('button', { name: 'Flow' })).toBeVisible()
+
+    // Message IN panel
+    await expect(page.getByText('Message IN')).toBeVisible()
+    await expect(page.getByText('Headers').first()).toBeVisible()
+    await expect(page.getByText('Body').first()).toBeVisible()
+  })
+
+  test('switching between Timeline and Flow view', async ({ page }) => {
+    await page.goto('/exchanges/E-2026-03-18-00201')
+
+    // Default view is timeline (gantt)
+    const timelineBtn = page.getByRole('button', { name: 'Timeline' })
+    const flowBtn = page.getByRole('button', { name: 'Flow' })
+
+    // Switch to Flow view
+    await flowBtn.click()
+
+    // Flow view should render (RouteFlow component)
+    await expect(flowBtn).toHaveClass(/active|Active/)
+
+    // Switch back to Timeline
+    await timelineBtn.click()
+    await expect(timelineBtn).toHaveClass(/active|Active/)
+  })
+
+  test('not-found exchange shows warning', async ({ page }) => {
+    await page.goto('/exchanges/nonexistent-id')
+
+    await expect(page.getByText('not found', { exact: false })).toBeVisible()
+  })
+
+  test('breadcrumb navigation works', async ({ page }) => {
+    await page.goto('/exchanges/E-2026-03-18-00201')
+
+    // Click Applications breadcrumb to go back
+    const appsBreadcrumb = page.getByRole('link', { name: 'Applications' })
+    await appsBreadcrumb.click()
+
+    await expect(page).toHaveURL(/\/apps/)
+  })
+})

e2e/routes.spec.ts

@@ -0,0 +1,63 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('Routes (/routes)', () => {
+  test('renders KPI cards, route table, and charts', async ({ page }) => {
+    await page.goto('/routes')
+
+    // KPI cards
+    await expect(page.getByText('Total Throughput')).toBeVisible()
+    await expect(page.getByText('System Error Rate')).toBeVisible()
+    await expect(page.getByText('Latency Percentiles')).toBeVisible()
+    await expect(page.getByText('Active Routes')).toBeVisible()
+    await expect(page.getByText('In-Flight Exchanges')).toBeVisible()
+
+    // Route performance table
+    await expect(page.getByText('Per-Route Performance')).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Route' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Exchanges' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Success %' })).toBeVisible()
+
+    const rows = page.locator('table tbody tr')
+    expect(await rows.count()).toBeGreaterThan(0)
+
+    // Charts render
+    await expect(page.getByText('Throughput (msg/s)').first()).toBeVisible()
+    await expect(page.getByText('Latency (ms)')).toBeVisible()
+    await expect(page.getByText('Errors by Route')).toBeVisible()
+    await expect(page.getByText('Message Volume (msg/min)')).toBeVisible()
+
+    // Auto-refresh indicator
+    await expect(page.getByText('Auto-refresh: 30s')).toBeVisible()
+  })
+
+  test('clicking a route row navigates to route detail', async ({ page }) => {
+    await page.goto('/routes')
+
+    // Click first route row
+    const firstRow = page.locator('table tbody tr').first()
+    await firstRow.click()
+
+    // Should navigate to route detail
+    await expect(page).toHaveURL(/\/routes\/[^/]+\/[^/]+/)
+
+    // Route detail view: processor performance table
+    await expect(page.getByText('Processor Performance')).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Processor' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Type' })).toBeVisible()
+    await expect(page.getByRole('columnheader', { name: 'Invocations' })).toBeVisible()
+
+    // Route Flow diagram
+    await expect(page.getByText('Route Flow')).toBeVisible()
+  })
+
+  test('app-scoped routes view filters data', async ({ page }) => {
+    await page.goto('/routes/order-service')
+
+    // Breadcrumb shows scope
+    await expect(page.getByRole('link', { name: 'Routes' })).toBeVisible()
+    await expect(page.getByLabel('Breadcrumb').getByText('order-service')).toBeVisible()
+
+    // Table still renders
+    await expect(page.getByText('Per-Route Performance')).toBeVisible()
+  })
+})

playwright.config.ts

@@ -0,0 +1,21 @@
+import { defineConfig } from '@playwright/test'
+
+export default defineConfig({
+  testDir: './e2e',
+  timeout: 30_000,
+  retries: 0,
+  use: {
+    baseURL: 'http://localhost:5173',
+    headless: true,
+    viewport: { width: 1440, height: 900 },
+  },
+  projects: [
+    { name: 'chromium', use: { browserName: 'chromium' } },
+  ],
+  webServer: {
+    command: 'npm run dev',
+    port: 5173,
+    reuseExistingServer: true,
+    timeout: 15_000,
+  },
+})

src/design-system/composites/EventFeed/EventFeed.tsx

@@ -81,25 +81,25 @@ export function EventFeed({ events, maxItems = 200, className }: EventFeedProps)
     .filter((e) => activeFilters.size === 0 || activeFilters.has(e.severity))
     .filter((e) => !searchLower || getSearchableText(e).toLowerCase().includes(searchLower))
 
-  // Auto-scroll to bottom
-  const scrollToBottom = useCallback(() => {
+  // Auto-scroll to top (newest entries are at top in desc sort)
+  const scrollToTop = useCallback(() => {
     const el = scrollRef.current
     if (el) {
-      el.scrollTop = el.scrollHeight
+      el.scrollTop = 0
     }
   }, [])
 
   useEffect(() => {
     if (!isPaused) {
-      scrollToBottom()
+      scrollToTop()
     }
-  }, [events, isPaused, scrollToBottom])
+  }, [events, isPaused, scrollToTop])
 
   function handleScroll() {
     const el = scrollRef.current
     if (!el) return
-    const atBottom = el.scrollHeight - el.scrollTop - el.clientHeight < 8
-    setIsPaused(!atBottom)
+    const atTop = el.scrollTop < 8
+    setIsPaused(!atTop)
   }
 
   function toggleFilter(severity: SeverityFilter) {
@@ -196,10 +196,10 @@ export function EventFeed({ events, maxItems = 200, className }: EventFeedProps)
           className={styles.resumeBtn}
           onClick={() => {
             setIsPaused(false)
-            scrollToBottom()
+            scrollToTop()
           }}
         >
-          ↓ Resume auto-scroll
+          &uarr; Scroll to latest
         </button>
       )}
     </div>

src/design-system/composites/LogViewer/LogViewer.module.css

@@ -1,7 +1,5 @@
 .container {
   overflow-y: auto;
-  background: var(--bg-inset);
-  border-radius: var(--radius-md);
   padding: 8px 0;
   font-family: var(--font-mono);
 }

src/design-system/composites/LogViewer/LogViewer.tsx

@@ -35,18 +35,18 @@ function formatTime(iso: string): string {
 
 export function LogViewer({ entries, maxHeight = 400, className }: LogViewerProps) {
   const scrollRef = useRef<HTMLDivElement>(null)
-  const isAtBottomRef = useRef(true)
+  const isAtTopRef = useRef(true)
 
   const handleScroll = useCallback(() => {
     const el = scrollRef.current
     if (!el) return
-    isAtBottomRef.current = el.scrollHeight - el.scrollTop - el.clientHeight < 20
+    isAtTopRef.current = el.scrollTop < 20
   }, [])
 
   useEffect(() => {
     const el = scrollRef.current
-    if (el && isAtBottomRef.current) {
-      el.scrollTop = el.scrollHeight
+    if (el && isAtTopRef.current) {
+      el.scrollTop = 0
     }
   }, [entries])
 

src/design-system/index.ts

@@ -7,5 +7,7 @@ export * from './layout'
 export * from './providers/ThemeProvider'
 export * from './providers/CommandPaletteProvider'
 export * from './providers/GlobalFilterProvider'
+export { BreadcrumbProvider, useBreadcrumb } from './providers/BreadcrumbProvider'
+export type { BreadcrumbItem } from './providers/BreadcrumbProvider'
 export * from './utils/hashColor'
 export * from './utils/timePresets'

src/design-system/layout/TopBar/TopBar.tsx

@@ -8,11 +8,8 @@ import { TimeRangeDropdown } from '../../primitives/TimeRangeDropdown/TimeRangeD
 import { useGlobalFilters } from '../../providers/GlobalFilterProvider'
 import { useCommandPalette } from '../../providers/CommandPaletteProvider'
 import { useTheme } from '../../providers/ThemeProvider'
-
-interface BreadcrumbItem {
-  label: string
-  href?: string
-}
+import { useBreadcrumbOverride } from '../../providers/BreadcrumbProvider'
+import type { BreadcrumbItem } from '../../providers/BreadcrumbProvider'
 
 interface TopBarProps {
   breadcrumb: BreadcrumbItem[]
@@ -39,11 +36,12 @@ export function TopBar({
   const globalFilters = useGlobalFilters()
   const commandPalette = useCommandPalette()
   const { theme, toggleTheme } = useTheme()
+  const breadcrumbOverride = useBreadcrumbOverride()
 
   return (
     <header className={`${styles.topbar} ${className ?? ''}`}>
       {/* Left: Breadcrumb */}
-      <Breadcrumb items={breadcrumb} className={styles.breadcrumb} />
+      <Breadcrumb items={breadcrumbOverride ?? breadcrumb} className={styles.breadcrumb} />
 
       {/* Search trigger */}
       <button

src/design-system/providers/BreadcrumbProvider.tsx

@@ -0,0 +1,44 @@
+import { createContext, useContext, useState, useEffect } from 'react'
+import type { ReactNode } from 'react'
+
+export interface BreadcrumbItem {
+  label: string
+  href?: string
+}
+
+interface BreadcrumbContextValue {
+  override: BreadcrumbItem[] | null
+  setOverride: (items: BreadcrumbItem[] | null) => void
+}
+
+const BreadcrumbContext = createContext<BreadcrumbContextValue>({
+  override: null,
+  setOverride: () => {},
+})
+
+export function BreadcrumbProvider({ children }: { children: ReactNode }) {
+  const [override, setOverride] = useState<BreadcrumbItem[] | null>(null)
+  return (
+    <BreadcrumbContext.Provider value={{ override, setOverride }}>
+      {children}
+    </BreadcrumbContext.Provider>
+  )
+}
+
+/**
+ * Override the TopBar breadcrumb with page-specific semantic items.
+ * Pass `null` to clear (or let unmount handle it).
+ * Callers should `useMemo` the items array to avoid unnecessary re-renders.
+ */
+export function useBreadcrumb(items: BreadcrumbItem[] | null) {
+  const { setOverride } = useContext(BreadcrumbContext)
+  useEffect(() => {
+    setOverride(items)
+    return () => setOverride(null)
+  }, [items, setOverride])
+}
+
+/** Internal — used by TopBar to read the current override. */
+export function useBreadcrumbOverride(): BreadcrumbItem[] | null {
+  return useContext(BreadcrumbContext).override
+}