Add runtime version reporting and display

src/server/index.js

@@ -31,6 +31,7 @@ import {
 } from '../shared/contracts/state.js';
 import { HarborError, normalizeHarborError } from '../shared/errors.js';
 import { createJsonStore, createStateStore } from './services/stateStore.js';
+import { buildVersionInfo } from './version.js';
 
 const MAX_BODY_BYTES = 1_000_000;
 const SUBSCRIPTION_REFRESH_INTERVAL_MS = 15 * 60 * 1000;
@@ -63,6 +64,7 @@ if (stateStore.recovery) {
 }
 
 const remoteDataplane = settings.appMode === 'gateway' && Boolean(process.env.DATAPLANE_SOCKET);
+const versionInfo = buildVersionInfo(settings.appMode);
 const singboxRuntime = remoteDataplane
   ? createDataplaneClient(settings.dataplaneSocket)
   : createSingboxRuntime({
@@ -462,6 +464,16 @@ async function handleApi(req, res) {
     return sendJson(res, 200, await publicState());
   }
 
+  if (req.method === 'GET' && req.url === '/api/version') {
+    if (!remoteDataplane) return sendJson(res, 200, versionInfo);
+    const runtime = await singboxRuntime.refresh();
+    return sendJson(res, 200, {
+      ...versionInfo,
+      components: { gatewayBackend: runtime.gatewayBackendVersion || null },
+      runtime: { singBox: runtime.singBoxVersion || null },
+    });
+  }
+
   if (req.method === 'GET' && req.url === '/api/shared-proxy') {
     return sendJson(res, 200, buildSharedProxyInfo({
       appMode: settings.appMode,