Implement fleet topology epidemiology tracker and strain plague map.

Adds epidemiology package, auth epidemiology_fix push, strain-based 3D map, and Vitest coverage.

server/web/src/pages/SeerPage.test.tsx

@@ -0,0 +1,69 @@
+/**
+ * @vitest-environment happy-dom
+ */
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { cleanup, render, screen, waitFor } from '@testing-library/react';
+import { MemoryRouter } from 'react-router-dom';
+import SeerPage from './SeerPage';
+import { routerFuture } from '../routerFuture';
+import { api } from '../api/client';
+
+vi.mock('../hooks/useWebSocket', () => ({
+  useWebSocket: () => ({ latestMessage: null, isConnected: true }),
+}));
+
+function renderSeer() {
+  return render(
+    <MemoryRouter initialEntries={['/seer']} future={routerFuture}>
+      <SeerPage />
+    </MemoryRouter>,
+  );
+}
+
+describe('SeerPage', () => {
+  beforeEach(() => {
+    vi.spyOn(api, 'getSeerStream').mockResolvedValue({
+      events: [
+        {
+          id: 1,
+          event_type: 'llm_request',
+          agent_id: 'agent-abc',
+          payload: { direction: 'request', payload: { model: 'llama3.2' } },
+          ts: '2026-06-07T12:00:00.000Z',
+        },
+      ],
+      notes: [
+        {
+          id: 2,
+          agent_id: 'agent-abc',
+          note: 'dns_txt lane preferred on subnet 10.0.1.0/24',
+          source: 'abc123',
+          ts: '2026-06-07T12:00:01.000Z',
+        },
+      ],
+    });
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    cleanup();
+  });
+
+  it('renders black terminal panes without input', async () => {
+    renderSeer();
+    expect(await screen.findByRole('heading', { name: /The Seer/i })).toBeInTheDocument();
+    expect(screen.getByText(/FLEET AI STREAM/i)).toBeInTheDocument();
+    expect(screen.getByText(/SEER NOTES/i)).toBeInTheDocument();
+    expect(screen.queryByRole('textbox')).toBeNull();
+    expect(screen.queryByRole('searchbox')).toBeNull();
+    await waitFor(() => {
+      expect(screen.getByText(/llama3.2/)).toBeInTheDocument();
+      expect(screen.getByText(/dns_txt lane preferred/i)).toBeInTheDocument();
+    });
+  });
+
+  it('shows live status when websocket connected', async () => {
+    renderSeer();
+    expect(await screen.findByText(/LIVE — streaming fleet AI payloads/i)).toBeInTheDocument();
+  });
+});