docs: hand off context snapshots and next-message permission staging

docs/协作/evidence/context-next-permission-01/request.txt

@@ -0,0 +1,12 @@
+{
+  "result": "PASS",
+  "tests": [
+    "serial model writes + frozen active turn",
+    "send failure retry",
+    "late result/event session isolation",
+    "draft settings during first session creation",
+    "permission snapshots both directions + save rollback + session isolation + plan/ask",
+    "permission captured before later toggle",
+    "nextRequestSettings whitelist"
+  ]
+}