fix(ultracode): (x) Close fully hides the Ultracode Agents panel

closeUltracodeAgentsPanel() only removed `open`, leaving the drawer in its
collapsed peek state (header strip still visible) — so (x) looked like a no-op.
Now also adds `hidden` (display:none), mirroring closeSubagentsPanel; does NOT
flip showUltracodeAgents (that gates the watcher + floating windows). Verified in
a real browser (post-close computed display:none). Bumps 1.1.4 -> 1.1.5.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "aicodeman",
-  "version": "1.1.4",
+  "version": "1.1.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "aicodeman",
-      "version": "1.1.4",
+      "version": "1.1.5",
       "hasInstallScript": true,
       "license": "MIT",
       "workspaces": [