feat: Notifications page, Sidebar layout fixes, and Achievements enhancements

- implemented /notifications page with overdue/upcoming alerts
- Fixed sidebar scrolling in collapsed mode
- Moved notification button to sidebar footer
- Enhanced Achievements page with streak stats and tooltips
- Improved XP history to show task titles
- Added missing translations (en/de)
- Removed top bar header
- Fixed Docker environment routing

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rest-express",
-  "version": "1.0.7",
+  "version": "1.0.8",
   "type": "module",
   "license": "MIT",
   "scripts": {
@@ -92,6 +92,7 @@
     "zod-validation-error": "^3.4.0"
   },
   "devDependencies": {
+    "@playwright/test": "^1.57.0",
     "@replit/vite-plugin-cartographer": "^0.3.0",
     "@replit/vite-plugin-runtime-error-modal": "^0.0.3",
     "@tailwindcss/typography": "^0.5.15",