matrix: wake and unread-guard on own read receipt, not push-rule count

hive-matrix-mcp/src/protocol.rs

@@ -27,10 +27,14 @@ pub enum InviteAction {
 pub struct RoomUnread {
     /// Canonical alias (`#name:server`) or room id (`!id:server`).
     pub label: String,
-    /// Server-side push-notification count for this room. Always ≥ 1.
+    /// Always `1` — an exact unread-message count is no longer tracked
+    /// (see `handlers::room_unread_state`'s doc comment for why); the
+    /// agent reads the room via `read_room` for full context, so only
+    /// "there's something new" plus a one-message preview matters here.
     pub count: u32,
-    /// Truncated body of the last message in the room. Present only when
-    /// `count == 1` and the fetch succeeded; absent otherwise.
+    /// Truncated body of the room's latest (unread) event. Present when
+    /// that event is a text-like message; absent for a reaction/state
+    /// event or when the fetch failed.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub last_body: Option<String>,
     /// Sender of the last message (`@user:server`). Present when