Fix WebUI release peer metadata

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@govoplan/mail-webui",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "private": true,
   "type": "module",
   "main": "webui/src/index.ts",
@@ -19,10 +19,15 @@
     "LICENSE"
   ],
   "peerDependencies": {
-    "@govoplan/core-webui": "^0.1.0",
+    "@govoplan/core-webui": "^0.1.1",
     "lucide-react": "^0.555.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-router-dom": "^7.1.1"
+  },
+  "peerDependenciesMeta": {
+    "@govoplan/core-webui": {
+      "optional": true
+    }
   }
 }