fix(editor): resolve TypeScript errors in editor component tests (#353)

- Remove unused imports (waitFor, type) from RenameWidget.test.tsx
- Remove unused import (waitFor) from FindReplaceWidget.test.tsx
- Remove unused inputStyle variable in FindReplaceWidget.test.tsx
- Add missing getScrolledVisiblePosition mock to createMockMonacoEditor

These changes fix TypeScript compilation errors (TS6133) for unused
variables and imports, and fix the missing mock property error (TS2339)
in the test files.

Co-authored-by: Droid Agent <droid@factory.ai>

Author: echobt

cortex-gui/src/components/editor/__tests__/FindReplaceWidget.test.tsx

@@ -11,7 +11,6 @@ import {
   fireEvent, 
   createMockMonaco, 
   createMockMonacoEditor,
-  waitFor,
   nextTick,
 } from "@/test/utils";
 import { FindReplaceWidget, FindReplaceWidgetProps } from "../FindReplaceWidget";
@@ -360,7 +359,6 @@ describe("FindReplaceWidget", () => {
         await nextTick();
 
         // Error styling may be applied
-        const inputStyle = window.getComputedStyle(searchInput);
         // The input may have error styling
         expect(searchInput).toBeTruthy();
       }

cortex-gui/src/components/editor/__tests__/RenameWidget.test.tsx

@@ -11,9 +11,7 @@ import {
   fireEvent, 
   createMockMonaco, 
   createMockMonacoEditor,
-  waitFor,
   nextTick,
-  type,
 } from "@/test/utils";
 import { 
   RenameWidget, 

cortex-gui/src/test/setup.ts

@@ -157,6 +157,7 @@ export const createMockMonacoEditor = () => ({
   setScrollPosition: vi.fn(),
   getVisibleRanges: vi.fn().mockReturnValue([]),
   getTopForLineNumber: vi.fn().mockReturnValue(0),
+  getScrolledVisiblePosition: vi.fn().mockReturnValue({ left: 100, top: 50, height: 20 }),
   getConfiguration: vi.fn().mockReturnValue({
     fontInfo: { fontSize: 14, lineHeight: 20 },
   }),