fix: chat UI

internal/service/notification_service.go

@@ -44,6 +44,11 @@ const (
 	// disciples. The actor is the disciple, so it renders and links exactly
 	// like the other actor-driven kinds.
 	NotifDiscipleJoined = "disciple_joined"
+	// NotifChatMessage exists ONLY as a preference key. Chat never creates a
+	// notifications row and never appears in the tray — a new message
+	// highlights its inbox row instead. The kind is here so the settings
+	// matrix can offer a push opt-out alongside everything else.
+	NotifChatMessage = "chat_message"
 
 	// Reminder kinds are delivered live (email + push + a websocket toast)
 	// but NOT persisted — they're ephemeral nudges, not history.
@@ -60,6 +65,9 @@ var PrefCategories = map[string][]string{
 	"post_interactions": {NotifPostLike, NotifPostMention, NotifPostComment, NotifCommentReply},
 	"sadhna_reminders":  {NotifChantReminder, NotifQuoteReminder, NotifChantIncomplete},
 	"community":         {NotifDiscipleJoined},
+	// Push only: in-app delivery for chat is the inbox itself, and there is
+	// no such thing as an emailed chat message.
+	"messages": {NotifChatMessage},
 }
 
 // PrefChannels is every delivery channel a matrix cell can address.