docs(work): close story 07 (editor library traces f8a4b70 + 3a1b088)

docs/work/_system/_state.json

@@ -1,5 +1,5 @@
 {
-  "updated_at": "2026-07-12T15:33:06.935Z",
+  "updated_at": "2026-07-12T17:13:31.993Z",
   "epics": {
     "platform-retrofit": {
       "status": "in-progress",
@@ -79,10 +79,10 @@
           "blocks": []
         },
         "07-editor-library-traces": {
-          "status": "todo",
+          "status": "done",
           "title": "Library traces for @xyflow/react and zustand",
           "ac_total": 2,
-          "ac_completed": 0,
+          "ac_completed": 2,
           "depends_on": [],
           "blocks": []
         },
@@ -246,11 +246,6 @@
       "story": "05-scaffold-optional-cores",
       "title": "Scaffold core-events and core-realtime"
     },
-    {
-      "epic": "platform-retrofit",
-      "story": "07-editor-library-traces",
-      "title": "Library traces for @xyflow/react and zustand"
-    },
     {
       "epic": "platform-retrofit",
       "story": "08-rewrite-agent-docs",