推进 INI 面板状态 report JSON 导出 helper

wasm-port/docs/ui-panel-state-summary.md

@@ -85,6 +85,21 @@ with four sections:
 The report is intended for upper-level UI consumers or export paths that want a
 stable summary shape without touching DOM nodes.
 
+## `createMachineSessionStateReportExport(state, options)`
+
+This helper wraps the report in a stable export payload:
+
+```js
+{
+  filename: "machine-session-state-report.json",
+  mediaType: "application/json",
+  report: { ... },
+  text: "{\n  ...\n}\n"
+}
+```
+
+It is a small export-layer helper for future copy/download/UI SDK wrappers.
+
 ## Boundary Rules
 
 - Do not parse G-code text in this helper.