fix: implement fetch generation counter to handle concurrent refreshes in ScrollingList

- Added a fetch generation counter to the fetchItems method to discard stale results from concurrent fetches.
- Updated the loading state management to ensure it only updates if the fetch is the latest.
- Enhanced the refresh method to prevent stale data from being rendered when multiple refreshes occur.
- Added a test case to verify that stale fetches are discarded correctly when concurrent refreshes happen.
- Fixed CSS for mobile banners to prevent overflow and adjusted font sizes for better visibility.
- Resolved issues with task icons disappearing when extending time on overdue chores by ensuring only one fetch is active at a time.

frontend/vue-app/e2e/.auth/user.json

@@ -2,17 +2,17 @@
   "cookies": [
     {
       "name": "refresh_token",
-      "value": "VqeLgoC9z5NgU2AtA-9xjl4DaRt0hYKDkmAJMN3dcnw",
+      "value": "GiDwb1pZ1oqvwzO16LokRkqIyCZ8nPJLzpzowwZRW-I",
       "domain": "localhost",
       "path": "/api/auth",
-      "expires": 1782155879.453865,
+      "expires": 1782241425.893418,
       "httpOnly": true,
       "secure": true,
       "sameSite": "Strict"
     },
     {
       "name": "access_token",
-      "value": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6ImUyZUB0ZXN0LmNvbSIsInVzZXJfaWQiOiI3ZjA2Njc5OS03NjI1LTQ0ZGQtODIwYi0zNWRjZmFlYWVjNTMiLCJ0b2tlbl92ZXJzaW9uIjowLCJleHAiOjE3NzQzODA3Nzl9.o9urIT0cfexJY8OarcJ4gtJKqN-_DZOw50VToPl25LU",
+      "value": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6ImUyZUB0ZXN0LmNvbSIsInVzZXJfaWQiOiI0MzEwZGI1MC04NDJjLTQ2OWQtOTg4YS0wMzFjMTliMWMwM2YiLCJ0b2tlbl92ZXJzaW9uIjowLCJleHAiOjE3NzQ0NjYzMjV9.5fn4UtlACnDCk2-O_n5f3HO9y1ksXDEnQjJl4TdJ-F4",
       "domain": "localhost",
       "path": "/",
       "expires": -1,
@@ -27,11 +27,11 @@
       "localStorage": [
         {
           "name": "authSyncEvent",
-          "value": "{\"type\":\"logout\",\"at\":1774379879245}"
+          "value": "{\"type\":\"logout\",\"at\":1774465425688}"
         },
         {
           "name": "parentAuth",
-          "value": "{\"expiresAt\":1774552679625}"
+          "value": "{\"expiresAt\":1774638226066}"
         }
       ]
     }