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

First step toward a Vue 3 / Nuxt 3 / Playwright e2e frontend stack.

Adds:
- frontend/ - Nuxt 3 scaffold (TypeScript)
- frontend/components/HealthDashboard.vue - calls /api/healthz, shows status/version/uptime/timestamp
- frontend/pages/index.vue - landing page using HealthDashboard
- frontend/nuxt.config.ts - dev proxy /api -> http://localhost:8080
- frontend/playwright.config.ts + tests/e2e/health.spec.ts - 1 baseline e2e test
- .gitignore - frontend artifacts excluded

Out of scope (separate PRs):
- Storybook
- Design system / Tailwind
- Auth pages
- Production build / deploy config

Generated ~95% in autonomy by Mistral Vibe via ICM workspace
~/Work/Vibe/workspaces/frontend-nuxt-scaffold/.

Trainer (Claude) finalized commit/PR (Mistral hit max-turns or trainer takeover).

🤖 Co-Authored-By: Mistral Vibe (devstral-2 / mistral-medium-3.5)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -34,3 +34,13 @@ config/runner
 coverage.txt
 trigger.txt
 test_trigger.txt
+
+# Frontend
+frontend/node_modules/
+frontend/.nuxt/
+frontend/.output/
+frontend/dist/
+frontend/.env
+frontend/.cache/
+frontend/test-results/
+frontend/playwright-report/

frontend/app.vue

@@ -0,0 +1,3 @@
+<template>
+  <NuxtPage />
+</template>

frontend/components/HealthDashboard.vue

@@ -0,0 +1,22 @@
+<script setup lang="ts">
+interface HealthInfo {
+  status: string
+  version: string
+  uptime_seconds: number
+  timestamp: string
+}
+const { data, pending, error } = await useFetch<HealthInfo>('/api/healthz')
+</script>
+<template>
+  <section data-testid="health-dashboard">
+    <h2>Server Health</h2>
+    <p v-if="pending">Loading...</p>
+    <p v-else-if="error">Error loading health: {{ error.message }}</p>
+    <ul v-else-if="data" data-testid="health-info">
+      <li><strong>Status:</strong> <span data-testid="health-status">{{ data.status }}</span></li>
+      <li><strong>Version:</strong> {{ data.version }}</li>
+      <li><strong>Uptime:</strong> {{ data.uptime_seconds }} seconds</li>
+      <li><strong>Last check:</strong> {{ data.timestamp }}</li>
+    </ul>
+  </section>
+</template>

frontend/nuxt.config.ts

@@ -0,0 +1,11 @@
+export default defineNuxtConfig({
+  devtools: { enabled: true },
+  nitro: {
+    devProxy: {
+      '/api': {
+        target: 'http://localhost:8080',
+        changeOrigin: true,
+      },
+    },
+  },
+})

frontend/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "dance-lessons-coach-frontend",
+  "type": "module",
+  "scripts": {
+    "build": "nuxt build",
+    "dev": "nuxt dev",
+    "generate": "nuxt generate",
+    "preview": "nuxt preview",
+    "postinstall": "nuxt prepare"
+  },
+  "devDependencies": {
+    "@playwright/test": "^1.59.1",
+    "@types/node": "^25.6.0",
+    "nuxt": "^3.13.0",
+    "typescript": "^6.0.3"
+  },
+  "packageManager": "npm@11.5.2"
+}

frontend/pages/index.vue

@@ -0,0 +1,6 @@
+<template>
+  <main>
+    <h1>dance-lessons-coach</h1>
+    <HealthDashboard />
+  </main>
+</template>

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,
+  },
+})

frontend/tests/e2e/health.spec.ts

@@ -0,0 +1,8 @@
+import { test, expect } from '@playwright/test'
+
+test('home page loads and shows server health info', async ({ page }) => {
+  await page.goto('/')
+  await expect(page.getByTestId('health-dashboard')).toBeVisible()
+  const heading = page.getByRole('heading', { name: /dance-lessons-coach/i })
+  await expect(heading).toBeVisible()
+})

frontend/tsconfig.json

@@ -0,0 +1,6 @@
+{
+  "extends": "./.nuxt/tsconfig.json",
+  "compilerOptions": {
+    "strict": true
+  }
+}