Add date-fns dependency to the frontend project

Added date-fns version 4.1.0 to package.json and package-lock.json. This introduces date utility functions, enabling easier date manipulations and formatting across the frontend. No functional changes yet, just preparing for future use.

frontend/package-lock.json

@@ -21,6 +21,7 @@
         "axios": "^1.8.1",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
+        "date-fns": "^4.1.0",
         "framer-motion": "^12.4.11",
         "jwt-decode": "^4.0.0",
         "lucide-react": "^0.477.0",
@@ -2975,6 +2976,16 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/date-fns": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-4.1.0.tgz",
+      "integrity": "sha512-Ukq0owbQXxa/U3EGtsdVBkR1w7KOQ5gIBqdH2hkvknzZPYvBxb/aa6E8L7tmjFtkwZBu3UXBbjIgPo/Ez4xaNg==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/kossnocorp"
+      }
+    },
     "node_modules/debug": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.0.tgz",

frontend/package.json

@@ -26,6 +26,7 @@
     "axios": "^1.8.1",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "date-fns": "^4.1.0",
     "framer-motion": "^12.4.11",
     "jwt-decode": "^4.0.0",
     "lucide-react": "^0.477.0",