feat(i18n): improve i18n copy and add new translations

- Add new translation entries
- Fix several language files

application/src/translations/en/about.ts

@@ -2,7 +2,7 @@
 import { AboutTranslations } from '../types/about';
 
 export const aboutTranslations: AboutTranslations = {
-  aboutCheckcle: "About Checkcle",
+  aboutCheckCle: "About Checkcle",
   systemDescription: "Checkcle is an open-source monitoring stack offering real-time insights into server and service health, incident management, and operational transparency. Released as MIT License.",
   systemVersion: "System Version",
   license: "License",
@@ -15,4 +15,5 @@ export const aboutTranslations: AboutTranslations = {
   quickActions: "Quick Actions",
   quickActionsDescription: "Access common monitoring operations and features quickly. Select an action below to get started.",
   quickTips: "Quick Tips",
+  releasedOn: "Released On",
 };