perf: skip missing Matrix IDB snapshot locks

extensions/matrix/src/matrix/sdk/idb-persistence.lock-order.test.ts

@@ -91,6 +91,7 @@ describe("Matrix IndexedDB persistence lock ordering", () => {
     });
     await persistIdbToDisk({ snapshotPath, databasePrefix: "openclaw-matrix-test" });
 
+    fs.writeFileSync(snapshotPath, "[]", "utf8");
     withFileLockMock.mockImplementationOnce(async (_filePath, options) => {
       capturedOptions.push(options as CapturedLockOptions);
       return false;

extensions/matrix/src/matrix/sdk/idb-persistence.test.ts

@@ -93,6 +93,13 @@ describe("Matrix IndexedDB persistence", () => {
     expect(dbs).toEqual([]);
   });
 
+  it("returns false without warning when the snapshot does not exist yet", async () => {
+    const restored = await restoreIdbFromDisk(path.join(tmpDir, "missing-snapshot.json"));
+
+    expect(restored).toBe(false);
+    expect(warnSpy).not.toHaveBeenCalled();
+  });
+
   it("serializes concurrent persist operations via file lock", async () => {
     const snapshotPath = path.join(tmpDir, "concurrent-persist.json");
     await seedDatabase({

extensions/matrix/src/matrix/sdk/idb-persistence.ts

@@ -217,6 +217,9 @@ function resolveDefaultIdbSnapshotPath(): string {
 export async function restoreIdbFromDisk(snapshotPath?: string): Promise<boolean> {
   const candidatePaths = snapshotPath ? [snapshotPath] : [resolveDefaultIdbSnapshotPath()];
   for (const resolvedPath of candidatePaths) {
+    if (!fs.existsSync(resolvedPath)) {
+      continue;
+    }
     try {
       const restored = await withFileLock(
         resolvedPath,