合并 web master 最新更新

将 web/master 的画布快照、图集标签和 Agent 框架更新合入像素艺术功能分支。

# Conflicts:
#	docs/project-memory/shared-memory/decision-log.md
#	server-rs/crates/api-server/src/external_editor_api.rs

docs/openapi/genarrative-external-v1.openapi.json

@@ -1761,7 +1761,8 @@
         "type": "object",
         "required": [
           "viewport",
-          "layers"
+          "layers",
+          "expectedRevision"
         ],
         "properties": {
           "viewport": {
@@ -1778,7 +1779,7 @@
           "expectedRevision": {
             "type": "integer",
             "minimum": 0,
-            "description": "可选的画布 revision CAS；不匹配时返回 409。"
+            "description": "必填的画布 revision CAS；不匹配时返回 409。"
           }
         },
         "additionalProperties": false