chore(client): add lint, format and test tooling

Configure ESLint 10 (flat, Vue + a11y), Prettier, Vitest + @vue/test-utils + jsdom, and add npm scripts for lint/format/test. Document VITE_API_BASE_URL.

client/package.json

@@ -6,23 +6,44 @@
   "scripts": {
     "dev": "vite",
     "build": "vue-tsc -b && vite build",
+    "preview": "vite preview",
     "copy": "node ../scripts/copy-client.mjs",
-    "preview": "vite preview"
+    "lint": "eslint .",
+    "lint:fix": "eslint . --fix",
+    "format": "prettier --write .",
+    "format:check": "prettier --check .",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:a11y": "vitest run --dir src"
   },
   "dependencies": {
     "@mdi/font": "^7.4.47",
     "@surrealdb/wasm": "^2.6.1",
     "@vueuse/core": "^15.0.0",
+    "pinia": "^4.0.3",
     "surrealdb": "^2.0.10",
     "vue": "^3.5.42",
+    "vue-i18n": "^11.4.13",
+    "vue-router": "^5.3.1",
     "vuetify": "^4.2.3"
   },
   "devDependencies": {
+    "@eslint/js": "^10.0.1",
     "@types/node": "^24.13.3",
     "@vitejs/plugin-vue": "^6.0.8",
+    "@vue/test-utils": "^2.5.1",
     "@vue/tsconfig": "^0.9.1",
+    "eslint": "^10.12.0",
+    "eslint-config-prettier": "^10.1.8",
+    "eslint-plugin-vue": "^10.11.1",
+    "eslint-plugin-vuejs-accessibility": "^2.6.0",
+    "globals": "^17.13.0",
+    "jsdom": "^29.1.1",
+    "prettier": "^3.9.9",
     "typescript": "~6.0.2",
+    "typescript-eslint": "^8.71.0",
     "vite": "^8.3.0",
+    "vitest": "^5.0.3",
     "vue-tsc": "^3.3.11"
   }
 }