fix: await queue mutations and repair editing actions

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@local/dsh-queue-steer",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Custom queue and steering logic, settings page, /queue and /steer commands, and two-list queue widget for DeepSeek Harness.",
   "type": "module",
   "main": "index.js",