Fix PR feedback: Improve Profile section translations and UX

- Fixed password reset translations in Profile section
- Moved language selector from TopNavbar to Profile page
- Added profile.selectPreferredLanguage translation key
- Improved user experience for language preferences

public/locales/en/translation.json

@@ -609,7 +609,8 @@
     "user": "User",
     "authMethod": "Authentication Method",
     "local": "Local",
-    "external": "External (OIDC)"
+    "external": "External (OIDC)",
+    "selectPreferredLanguage": "Select your preferred language for the interface"
   },
   "placeholders": {
     "enterCode": "000000",

public/locales/zh/translation.json

@@ -609,7 +609,8 @@
     "user": "用户",
     "authMethod": "认证方式",
     "local": "本地",
-    "external": "外部 (OIDC)"
+    "external": "外部 (OIDC)",
+    "selectPreferredLanguage": "选择您的界面首选语言"
   },
   "placeholders": {
     "enterCode": "000000",