test: remove any type from UserAvatar test mountComponent helper

- Replace `props: any` with `Record<string, unknown>`
- Use ComponentProps type assertion for type safety
- Import ComponentProps from vue-component-type-helpers

Part of Phase 2 - Quick wins (1 instance removed)

src/components/common/UserAvatar.test.ts

@@ -1,3 +1,5 @@
+import type { ComponentProps } from 'vue-component-type-helpers'
+
 import { mount } from '@vue/test-utils'
 import Avatar from 'primevue/avatar'
 import PrimeVue from 'primevue/config'
@@ -27,7 +29,7 @@ describe('UserAvatar', () => {
     app.use(PrimeVue)
   })
 
-  const mountComponent = (props: any = {}) => {
+  const mountComponent = (props: ComponentProps<typeof UserAvatar> = {}) => {
     return mount(UserAvatar, {
       global: {
         plugins: [PrimeVue, i18n],