按建议，继续完成后续工作

结论：已将 session snapshot store 纳入 Chromium 浏览器 smoke，验证真实浏览器 OPFS 中的 INI 文本和通用 session snapshot 均可往返保存读取。

wasm-port/tests/browser/ini_panel_smoke.html

@@ -10,6 +10,10 @@
     import { createLinuxCncIniSdk } from "../../runtime/sdk/src/linuxcnc-ini.js";
     import { loadTextFile, saveTextFile } from "../../runtime/opfs/file-service.js";
     import { machineIniPath } from "../../runtime/opfs/path-model.js";
+    import {
+      loadSessionSnapshot,
+      saveSessionSnapshot,
+    } from "../../runtime/opfs/snapshot-store.js";
 
     const status = document.getElementById("status");
 
@@ -51,6 +55,23 @@ JOINTS = 3
       await saveTextFile(opfsPath, iniText);
       assertEqual(await loadTextFile(opfsPath), iniText, "opfs roundtrip");
 
+      const snapshotPayload = { files: { ini: opfsPath } };
+      const savedSnapshot = await saveSessionSnapshot(
+        "browser-session",
+        snapshotPayload,
+        {
+          createdAt: "2026-06-08T00:00:00.000Z",
+          metadata: { source: "browser-smoke" },
+        },
+      );
+      const loadedSnapshot = await loadSessionSnapshot("browser-session");
+      assertEqual(loadedSnapshot.format, "linuxcnc-wasm-session-snapshot", "snapshot format");
+      assertEqual(loadedSnapshot.version, 1, "snapshot version");
+      assertEqual(loadedSnapshot.sessionId, "browser-session", "snapshot session");
+      assertEqual(loadedSnapshot.createdAt, savedSnapshot.createdAt, "snapshot timestamp");
+      assertEqual(loadedSnapshot.payload.files.ini, opfsPath, "snapshot payload");
+      assertEqual(loadedSnapshot.metadata.source, "browser-smoke", "snapshot metadata");
+
       status.textContent = "browser_ini_opfs_smoke=ok";
     } catch (error) {
       status.textContent = `browser_ini_opfs_smoke=fail ${error.stack || error.message}`;