refactor: improve TypeScript patterns in test files (Group 1/8) (#8253)

## Summary
Improves type safety in test files by replacing unsafe type patterns
with proper TypeScript idioms.

## Changes
- Define typed `TestWindow` interface extending `Window` for Playwright
tests with custom properties
- Use `Partial<HTMLElement>` with single type assertion for DOM element
mocks
- Remove redundant type imports
- Fix `console.log` → `console.warn` in test fixture

## Files Changed
16 test files across browser_tests, packages, and src/components

## Test Plan
- ✅ `pnpm typecheck` passes
- ✅ No new `any` types introduced
- ✅ All pre-commit hooks pass

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8253-refactor-improve-TypeScript-patterns-in-test-files-Group-1-8-2f16d73d365081548f9ece7bcf0525ee)
by [Unito](https://www.unito.io)

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/components/dialog/content/setting/UsageLogsTable.test.ts

@@ -12,6 +12,7 @@ import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { nextTick } from 'vue'
 import { createI18n } from 'vue-i18n'
 
+import type { AuditLog } from '@/services/customerEventsService'
 import { EventType } from '@/services/customerEventsService'
 
 import UsageLogsTable from './UsageLogsTable.vue'
@@ -19,7 +20,7 @@ import UsageLogsTable from './UsageLogsTable.vue'
 type ComponentInstance = InstanceType<typeof UsageLogsTable> & {
   loading: boolean
   error: string | null
-  events: any[]
+  events: Partial<AuditLog>[]
   pagination: {
     page: number
     limit: number