referrals: add "use expiry" option

adds an option when enabling referrals to use the duration of the source
invited (i.e., months, days, hours) for the referral invite. If enabled,
the user won't be able to make a new referral link after it expires. For
referrals enabled for new users via a profile, the clock starts ticking
as soon as the account is created.

lang/admin/en-us.json

@@ -76,6 +76,8 @@
         "disableReferrals": "Disable Referrals",
         "enableReferralsDescription": "Give users a personal referral link similiar to an invite, to send to friends/family. Can be sourced from a referral template in a profile, or from an existing invite.",
         "enableReferralsProfileDescription": "Give users created with this profile a personal referral link similiar to an invite, to send to friends/family. Create an invite with the desired settings, then select it here. Each referral will then be based on this invite. You can delete the invite once complete.",
+        "useInviteExpiry": "Set expiry from profile/invite",
+        "useInviteExpiryNote": "By default, invites expire after 90 days but can be renewed by the user. Enable for the referral to be disabled after the time set.",
         "applyHomescreenLayout": "Apply homescreen layout",
         "sendDeleteNotificationEmail": "Send notification message",
         "sendDeleteNotifiationExample": "Your account has been deleted.",

lang/form/en-us.json

@@ -36,6 +36,7 @@
         "resetSentDescription": "If an account with the given username/contact method exists, a password reset link has been sent via all contact methods available. The code will expire in 30 minutes.",
         "changePassword": "Change Password",
         "referralsDescription": "Invite friends & family to Jellyfin with this link. Come back here for a new one if it expires.",
+        "referralsWithExpiryDescription": "Invite friends & family to Jellyfin with this link. The link will be disabled once it expires.",
         "copyReferral": "Copy Link",
         "invitedBy": "You were invited by user {user}."
     },