feat(ui): show OpenClaw version tooltip on Gateway button

app/api/gateway-health/route.ts

@@ -8,6 +8,7 @@ const OPENCLAW_HOME = process.env.OPENCLAW_HOME || path.join(process.env.HOME ||
 const CONFIG_PATH = path.join(OPENCLAW_HOME, "openclaw.json");
 const DEGRADED_LATENCY_MS = 1500;
 const execFileAsync = promisify(execFile);
+let cachedOpenclawVersion: { value: string | null; expiresAt: number } | null = null;
 
 function parseJsonFromMixedOutput(output: string): any {
   for (let i = 0; i < output.length; i++) {
@@ -65,9 +66,29 @@ async function probeGatewayViaCli(token: string, timeoutMs = 5000): Promise<{ ok
   }
 }
 
+async function getOpenclawVersion(): Promise<string | undefined> {
+  const now = Date.now();
+  if (cachedOpenclawVersion && cachedOpenclawVersion.expiresAt > now) {
+    return cachedOpenclawVersion.value || undefined;
+  }
+  try {
+    const { stdout } = await execFileAsync("openclaw", ["--version"], {
+      maxBuffer: 1024 * 1024,
+      env: { ...process.env, FORCE_COLOR: "0" },
+    });
+    const version = stdout.trim().split(/\s+/)[0] || null;
+    cachedOpenclawVersion = { value: version, expiresAt: now + 60 * 60 * 1000 };
+    return version || undefined;
+  } catch {
+    cachedOpenclawVersion = { value: null, expiresAt: now + 60 * 1000 };
+    return undefined;
+  }
+}
+
 export async function GET() {
   const startedAt = Date.now();
   try {
+    const openclawVersion = await getOpenclawVersion();
     const raw = fs.readFileSync(CONFIG_PATH, "utf-8");
     const config = JSON.parse(raw);
     const port = config.gateway?.port || 18789;
@@ -89,6 +110,7 @@ export async function GET() {
       return NextResponse.json({
         ok: true,
         data,
+        openclawVersion,
         status: responseMs > DEGRADED_LATENCY_MS ? "degraded" : "healthy",
         checkedAt,
         responseMs,
@@ -104,6 +126,7 @@ export async function GET() {
       return NextResponse.json({
         ok: true,
         data: null,
+        openclawVersion,
         status: "healthy",
         checkedAt,
         responseMs,
@@ -113,12 +136,14 @@ export async function GET() {
 
     return NextResponse.json({
       ok: false,
+      openclawVersion,
       error: cli.error || `HTTP ${resp.status}`,
       status: "down",
       checkedAt,
       responseMs,
     });
   } catch (err: any) {
+    const openclawVersion = await getOpenclawVersion();
     // If HTTP probe fails due transport/runtime issues, attempt CLI probe before declaring down.
     const raw = err.cause?.code === "ECONNREFUSED"
       ? "Gateway 未运行"
@@ -150,6 +175,7 @@ export async function GET() {
       return NextResponse.json({
         ok: true,
         data: null,
+        openclawVersion,
         status: "healthy",
         checkedAt,
         responseMs,
@@ -158,6 +184,7 @@ export async function GET() {
     }
     return NextResponse.json({
       ok: false,
+      openclawVersion,
       error: cli.error || raw,
       status: "down",
       checkedAt,

app/gateway-status.tsx

@@ -17,6 +17,7 @@ interface HealthResult {
   error?: string;
   data?: any;
   webUrl?: string;
+  openclawVersion?: string;
 }
 
 interface GatewayStatusProps {
@@ -29,6 +30,7 @@ export function GatewayStatus({ compact = false, className = "", hideIconOnMobil
   const { t } = useI18n();
   const [health, setHealth] = useState<HealthResult | null>(null);
   const [showError, setShowError] = useState(false);
+  const [showVersionTip, setShowVersionTip] = useState(false);
 
   const check = useCallback(() => {
     fetch("/api/gateway-health")
@@ -43,12 +45,21 @@ export function GatewayStatus({ compact = false, className = "", hideIconOnMobil
     return () => clearInterval(timer);
   }, [check]);
 
+  const gatewayTitle = health?.openclawVersion
+    ? `OpenClaw ${health.openclawVersion}`
+    : "OpenClaw";
+
   return (
     <div className={`relative inline-flex items-center gap-1.5 ${className}`.trim()}>
       <a
         href={health?.ok && health.webUrl ? resolveGatewayUrl(health.webUrl) : undefined}
         target="_blank"
         rel="noopener noreferrer"
+        title={gatewayTitle}
+        onMouseEnter={() => setShowVersionTip(true)}
+        onMouseLeave={() => setShowVersionTip(false)}
+        onFocus={() => setShowVersionTip(true)}
+        onBlur={() => setShowVersionTip(false)}
         className={`inline-flex items-center rounded-full font-medium border hover:bg-cyan-500/30 transition-colors cursor-pointer ${
           compact ? "px-2 py-1 text-[10px]" : "px-2 py-0.5 text-xs"
         } ${
@@ -65,6 +76,11 @@ export function GatewayStatus({ compact = false, className = "", hideIconOnMobil
         ) : "🦞 Gateway"}
         <span className="opacity-50 text-[10px]">↗</span>
       </a>
+      {showVersionTip && (
+        <div className="absolute top-full left-0 mt-1 z-50 px-2 py-1 rounded-md bg-black/80 border border-white/10 text-white text-[10px] whitespace-nowrap shadow-lg pointer-events-none">
+          {gatewayTitle}
+        </div>
+      )}
       {!health ? (
         <span className={compact ? "text-[10px] text-[var(--text-muted)]" : "text-xs text-[var(--text-muted)]"}>--</span>
       ) : health.ok ? (