test: add test infrastructure for frontend and server

- Frontend: vitest.config.ts with vue plugin + jsdom, dummy component test
- Server: in-memory SQLite test DB factory + Hono testClient helper + smoke test
- CI: add pnpm audit and server coverage threshold steps
- Root: vitest workspace config for multi-project test discovery

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/package.json

@@ -16,7 +16,10 @@
   },
   "devDependencies": {
     "@tailwindcss/vite": "^4.2.1",
+    "@testing-library/vue": "^8.1.0",
     "@vitejs/plugin-vue": "^5.2.3",
+    "@vue/test-utils": "^2.4.6",
+    "jsdom": "^28.1.0",
     "tailwindcss": "^4.2.1",
     "typescript": "^5.7.3",
     "vite": "^7.3.1",

frontend/src/components/__tests__/DummyComponent.test.ts

@@ -0,0 +1,19 @@
+import { describe, it, expect } from 'vitest'
+import { mount } from '@vue/test-utils'
+import DummyComponent from './DummyComponent.vue'
+
+describe('DummyComponent', () => {
+  it('renders the message prop as text content', () => {
+    const wrapper = mount(DummyComponent, {
+      props: { message: 'BOTFIGHTS' },
+    })
+    expect(wrapper.text()).toBe('BOTFIGHTS')
+  })
+
+  it('renders different message', () => {
+    const wrapper = mount(DummyComponent, {
+      props: { message: 'Stack sats, fight bots' },
+    })
+    expect(wrapper.text()).toBe('Stack sats, fight bots')
+  })
+})

frontend/src/components/__tests__/DummyComponent.vue

@@ -0,0 +1,7 @@
+<script setup lang="ts">
+defineProps<{ message: string }>()
+</script>
+
+<template>
+  <div class="dummy">{{ message }}</div>
+</template>

frontend/src/test-setup.ts

@@ -0,0 +1,2 @@
+// Frontend test setup for @vue/test-utils + jsdom
+// Add global test utilities and mocks here as needed

frontend/vitest.config.ts

@@ -0,0 +1,18 @@
+import { defineConfig } from 'vitest/config'
+import vue from '@vitejs/plugin-vue'
+import { resolve } from 'path'
+
+export default defineConfig({
+  plugins: [vue()],
+  resolve: {
+    alias: {
+      '@': resolve(__dirname, 'src'),
+    },
+  },
+  test: {
+    environment: 'jsdom',
+    globals: true,
+    include: ['src/**/*.test.ts'],
+    setupFiles: ['src/test-setup.ts'],
+  },
+})