feat(erp-frontend-vue): add Playwright E2E tests and update layout

Add Playwright configuration and E2E specs for key production, purchasing, and warehouse flows, and update layout/login to align with the new testing setup.

Made-with: Cursor

erp-frontend-vue/package.json

@@ -8,7 +8,8 @@
     "build": "vue-tsc -b && vite build",
     "preview": "vite preview",
     "test": "vitest run",
-    "test:watch": "vitest"
+    "test:watch": "vitest",
+    "test:e2e": "playwright test"
   },
   "dependencies": {
     "@element-plus/icons-vue": "^2.3.2",
@@ -20,6 +21,7 @@
     "vue-router": "^4.6.4"
   },
   "devDependencies": {
+    "@playwright/test": "^1.58.2",
     "@types/node": "^24.10.1",
     "@vitejs/plugin-vue": "^6.0.1",
     "@vue/test-utils": "^2.4.6",