feat: add E2E smoke tests, architecture docs, and operations runbook

- 27 Playwright E2E tests covering login (3 roles), CC Agent pages
  (call desk, call history, patients, appointments, my performance,
  sidebar, sign-out), and Supervisor pages (all 11 pages + sidebar)
- Tests run against live EC2 at ramaiah.engage.healix360.net
- Last test completes sign-out to release agent session for next run
- Architecture doc with updated Mermaid diagram including telephony
  dispatcher, service discovery, and multi-tenant topology
- Operations runbook with SSH access (VPS + EC2), accounts, container
  reference, deploy steps, Redis ops, and troubleshooting guide

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

playwright.config.ts

@@ -0,0 +1,51 @@
+import { defineConfig } from '@playwright/test';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+export default defineConfig({
+    testDir: './e2e',
+    timeout: 60_000,
+    expect: { timeout: 10_000 },
+    retries: 1,
+    workers: 1,
+    reporter: [['html', { open: 'never' }], ['list']],
+    use: {
+        baseURL: process.env.E2E_BASE_URL ?? 'https://ramaiah.engage.healix360.net',
+        headless: true,
+        screenshot: 'only-on-failure',
+        trace: 'on-first-retry',
+        actionTimeout: 8_000,
+        navigationTimeout: 15_000,
+    },
+    projects: [
+        // Login tests run first — fresh browser, no saved auth
+        {
+            name: 'login',
+            testMatch: /agent-login\.spec\.ts/,
+            use: { browserName: 'chromium' },
+        },
+        // Auth setup — saves CC agent session for reuse
+        {
+            name: 'agent-setup',
+            testMatch: /auth\.setup\.ts/,
+        },
+        // CC Agent feature tests — reuse saved auth
+        {
+            name: 'cc-agent',
+            dependencies: ['agent-setup'],
+            use: {
+                storageState: path.join(__dirname, 'e2e/.auth/agent.json'),
+                browserName: 'chromium',
+            },
+            testMatch: /agent-smoke\.spec\.ts/,
+        },
+        // Supervisor tests — logs in fresh each run
+        {
+            name: 'supervisor',
+            testMatch: /supervisor-smoke\.spec\.ts/,
+            use: { browserName: 'chromium' },
+        },
+    ],
+});