Show invited people the Rule, let them copy its cards for their community, and replace an expired invitation link.

messages/en/metadata.json

@@ -50,6 +50,14 @@
     "title": "Log in",
     "description": "Enter your email and we'll send you a magic link to sign in. No password needed!"
   },
+  "invite": {
+    "title": "Invitation",
+    "description": "Read a CommunityRule you were invited to see."
+  },
+  "inviteExpired": {
+    "title": "This link has expired",
+    "description": "Ask for a new invitation link to read the Rule."
+  },
   "profile": {
     "title": "Profile",
     "description": "Manage your CommunityRules, saved progress, and account."