fix: report macos product version in presence

src/infra/system-presence.ts

@@ -69,10 +69,17 @@ function initSelfPresence() {
     }
     return os.arch();
   })();
+  const macOSVersion = () => {
+    const res = spawnSync("sw_vers", ["-productVersion"], {
+      encoding: "utf-8",
+    });
+    const out = typeof res.stdout === "string" ? res.stdout.trim() : "";
+    return out.length > 0 ? out : os.release();
+  };
   const platform = (() => {
     const p = os.platform();
     const rel = os.release();
-    if (p === "darwin") return `macos ${rel}`;
+    if (p === "darwin") return `macos ${macOSVersion()}`;
     if (p === "win32") return `windows ${rel}`;
     return `${p} ${rel}`;
   })();