fix: add spawnSync error logging and restore 5s timeout

- Check spawnSync result and log warning on failure via stderr
- Restore osascript timeout to 5000ms, increase hook deadline to 10s
  for sufficient headroom

hooks/hooks.json

@@ -297,7 +297,7 @@
             "type": "command",
             "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/hooks/run-with-flags.js\" \"stop:desktop-notify\" \"scripts/hooks/desktop-notify.js\" \"standard,strict\"",
             "async": true,
-            "timeout": 5
+            "timeout": 10
           }
         ],
         "description": "Send macOS desktop notification with task summary when Claude responds"

scripts/hooks/desktop-notify.js

@@ -47,7 +47,10 @@ function notifyMacOS(title, body) {
   const safeBody = body.replace(/\\/g, '').replace(/"/g, '\u201C');
   const safeTitle = title.replace(/\\/g, '').replace(/"/g, '\u201C');
   const script = `display notification "${safeBody}" with title "${safeTitle}"`;
-  spawnSync('osascript', ['-e', script], { stdio: 'ignore', timeout: 3000 });
+  const result = spawnSync('osascript', ['-e', script], { stdio: 'ignore', timeout: 5000 });
+  if (result.error || result.status !== 0) {
+    log(`[DesktopNotify] osascript failed: ${result.error ? result.error.message : `exit ${result.status}`}`);
+  }
 }
 
 // TODO: future platform support