diff --git a/package.json b/package.json
index 1caca8dc2a8..9c1f63e00e5 100644
--- a/package.json
+++ b/package.json
@@ -368,6 +368,7 @@
     "json5": "^2.2.3",
     "jszip": "^3.10.1",
     "linkedom": "^0.18.12",
+    "long": "^5.3.2",
     "markdown-it": "^14.1.1",
     "node-edge-tts": "^1.2.10",
     "opusscript": "^0.1.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3d3c952482a..cc08b9f1220 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -133,6 +133,9 @@ importers:
       linkedom:
         specifier: ^0.18.12
         version: 0.18.12
+      long:
+        specifier: ^5.3.2
+        version: 5.3.2
       markdown-it:
         specifier: ^14.1.1
         version: 14.1.1
diff --git a/src/browser/client-fetch.loopback-auth.test.ts b/src/browser/client-fetch.loopback-auth.test.ts
index 70042a2ebee..cda6d29d4e3 100644
--- a/src/browser/client-fetch.loopback-auth.test.ts
+++ b/src/browser/client-fetch.loopback-auth.test.ts
@@ -122,9 +122,12 @@ describe("fetchBrowserJson loopback auth", () => {
   it("preserves dispatcher error context while keeping no-retry hint", async () => {
     mocks.dispatch.mockRejectedValueOnce(new Error("Chrome CDP handshake timeout"));
 
-    const thrown = await fetchBrowserJson<{ ok: boolean }>("/tabs").catch((err) => err as Error);
+    const thrown = await fetchBrowserJson<{ ok: boolean }>("/tabs").catch((err: unknown) => err);
 
     expect(thrown).toBeInstanceOf(Error);
+    if (!(thrown instanceof Error)) {
+      throw new Error(`Expected Error, got ${String(thrown)}`);
+    }
     expect(thrown.message).toContain("Chrome CDP handshake timeout");
     expect(thrown.message).toContain("Do NOT retry the browser tool");
     expect(thrown.message).not.toContain("Can't reach the OpenClaw browser control service");
@@ -139,10 +142,13 @@ describe("fetchBrowserJson loopback auth", () => {
     );
 
     const thrown = await fetchBrowserJson<{ ok: boolean }>("http://example.com/").catch(
-      (err) => err as Error,
+      (err: unknown) => err,
     );
 
     expect(thrown).toBeInstanceOf(Error);
+    if (!(thrown instanceof Error)) {
+      throw new Error(`Expected Error, got ${String(thrown)}`);
+    }
     expect(thrown.message).toContain("Can't reach the OpenClaw browser control service");
     expect(thrown.message).toContain("Do NOT retry the browser tool");
   });
diff --git a/ui/src/ui/app-view-state.ts b/ui/src/ui/app-view-state.ts
index eb0059faf8e..2029bd8f8f4 100644
--- a/ui/src/ui/app-view-state.ts
+++ b/ui/src/ui/app-view-state.ts
@@ -59,7 +59,6 @@ export type AppViewState = {
   chatToolMessages: unknown[];
   chatStreamSegments: Array<{ text: string; ts: number }>;
   chatStream: string | null;
-  chatStreamSegments: Array<{ text: string; ts: number }>;
   chatStreamStartedAt: number | null;
   chatRunId: string | null;
   compactionStatus: CompactionStatus | null;