✨ feat(frontend): scaffold minimal Nuxt 3 frontend with healthz dashboard (#25)

First Vue 3 / Nuxt 3 / Playwright frontend layer for dance-lessons-coach. Minimal: 1 page, 1 component fetching /api/healthz, 1 e2e test. Out of scope: Storybook, design system, auth pages, deploy.

~95% Mistral autonomous via ICM workspace ~/Work/Vibe/workspaces/frontend-nuxt-scaffold/. Mistral handled the npx nuxi init TUI by falling back to manual file creation (Q-032 documented).

Co-authored-by: Gabriel Radureau <arcodange@gmail.com>
Co-committed-by: Gabriel Radureau <arcodange@gmail.com>

frontend/playwright.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig } from '@playwright/test'
+export default defineConfig({
+  testDir: './tests/e2e',
+  timeout: 30_000,
+  use: {
+    baseURL: 'http://localhost:3000',
+  },
+  webServer: {
+    command: 'npm run dev',
+    url: 'http://localhost:3000',
+    timeout: 60_000,
+    reuseExistingServer: !process.env.CI,
+  },
+})