lifecycle: drop manager port special case (#753) — manager hashes into 8100..8999 like every other agent

hive-c0re/src/dashboard.rs

@@ -30,8 +30,6 @@ use crate::container_view::{ContainerView, claude_has_session};
 use crate::coordinator::Coordinator;
 use crate::lifecycle::{self, MANAGER_NAME};
 
-const MANAGER_PORT: u16 = 8000;
-
 #[derive(Clone)]
 struct AppState {
     coord: Arc<Coordinator>,
@@ -416,7 +414,7 @@ async fn api_state(headers: HeaderMap, State(state): State<AppState>) -> axum::J
     axum::Json(StateSnapshot {
         seq,
         hostname,
-        manager_port: MANAGER_PORT,
+        manager_port: lifecycle::agent_web_port(MANAGER_NAME),
         any_stale,
         containers,
         transients,