chore: Fix types in tests 35/N.

src/signal/monitor.event-handler.sender-prefix.e2e.test.ts

@@ -1,4 +1,5 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
+import type { SignalReactionMessage } from "./monitor/event-handler.types.js";
 
 const dispatchMock = vi.fn();
 const readAllowFromMock = vi.fn();
@@ -64,7 +65,7 @@ describe("signal event handler sender prefix", () => {
       fetchAttachment: async () => null,
       deliverReplies: async () => undefined,
       resolveSignalReactionTargets: () => [],
-      isSignalReactionMessage: () => false,
+      isSignalReactionMessage: (_reaction): _reaction is SignalReactionMessage => false,
       shouldEmitSignalReactionNotification: () => false,
       buildSignalReactionSystemEventText: () => "",
     });

src/signal/monitor.tool-result.pairs-uuid-only-senders-uuid-allowlist-entry.e2e.test.ts

@@ -23,12 +23,14 @@ async function runMonitorWithMocks(
 }
 describe("monitorSignalProvider tool results", () => {
   it("pairs uuid-only senders with a uuid allowlist entry", async () => {
+    const baseChannels = (config.channels ?? {}) as Record<string, unknown>;
+    const baseSignal = (baseChannels.signal ?? {}) as Record<string, unknown>;
     setSignalToolResultTestConfig({
       ...config,
       channels: {
-        ...config.channels,
+        ...baseChannels,
         signal: {
-          ...config.channels?.signal,
+          ...baseSignal,
           autoStart: false,
           dmPolicy: "pairing",
           allowFrom: [],