chore: update CHANGELOG for version 0.6.0-alpha, add in-app notification center, and update package dependencies

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pulse-frontend",
-  "version": "0.5.0-alpha",
+  "version": "0.6.0-alpha",
   "private": true,
   "scripts": {
     "dev": "next dev",
@@ -10,7 +10,8 @@
     "type-check": "tsc --noEmit"
   },
   "dependencies": {
-    "@ciphera-net/ui": "^0.0.49",
+    "@ciphera-net/ui": "^0.0.50",
+    "@radix-ui/react-icons": "^1.3.0",
     "@ducanh2912/next-pwa": "^10.2.9",
     "axios": "^1.13.2",
     "country-flag-icons": "^1.6.4",