fix: add TelemetryService mock to multiApplyDiffTool tests

Author: daniel-lxs

src/core/tools/__tests__/multiApplyDiffTool.spec.ts

@@ -13,6 +13,18 @@ vi.mock("../applyDiffTool", () => ({
 	applyDiffToolLegacy: vi.fn(),
 }))
 
+// Mock TelemetryService
+vi.mock("@roo-code/telemetry", () => ({
+	TelemetryService: {
+		get instance() {
+			return {
+				trackEvent: vi.fn(),
+				trackError: vi.fn(),
+			}
+		},
+	},
+}))
+
 describe("multiApplyDiffTool", () => {
 	let mockCline: any
 	let mockBlock: any