server: api/health.rs — GET /api/health returns uptime, session/agent counts

server/src/api/health.rs

@@ -0,0 +1,21 @@
+use actix_web::{web, HttpResponse};
+use std::sync::Arc;
+
+use crate::models::{ApiResponse, HealthInfo};
+use crate::state::AppState;
+
+/// `GET /api/health`
+///
+/// Returns server uptime, active sessions, connected agents and version.
+pub async fn health(state: web::Data<Arc<AppState>>) -> HttpResponse {
+    let uptime = state.started_at.elapsed().as_secs();
+    let (sessions, agents) = state.stats();
+    let info = HealthInfo {
+        status: "ok".into(),
+        uptime_secs: uptime,
+        active_sessions: sessions,
+        connected_agents: agents,
+        version: env!("CARGO_PKG_VERSION").into(),
+    };
+    HttpResponse::Ok().json(ApiResponse::ok(info))
+}