Migrate Coach attendance tests to Vue Testing Library

[rtibbles]

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Overview

Complexity: Low

Context

The test suites for the Coach plugin's attendance components currently use @vue/test-utils, which couples tests to component internals. These test files were added after the original migration sub-issues were scoped, so they aren't covered by any existing sub-issue.

The Change

Refactor these test files to use Vue Testing Library (VTL) and write tests that reflect how a user interacts with attendance tracking:

• kolibri/plugins/coach/frontend/views/attendance/__tests__/AttendanceHistoryPage.spec.js
• kolibri/plugins/coach/frontend/views/home/HomePage/__tests__/AttendanceBlock.spec.js

Do not refactor any other test files or areas of the codebase.

Acceptance Criteria

• Both files migrated to use @testing-library/vue
• No residual @vue/test-utils imports in migrated files
• Cover all major workflows while avoiding excessive testing of details
• Concise but explicit test descriptions that describe what's tested from a user point of view
• Follow Testing Library principles and Testing Library query priority recommendation
• Use patterns consistent with existing VTL test suites (search for from '@testing-library/vue')
• All migrated tests pass: pnpm run test-jest -- --testPathPattern coach

References

• Reference VTL test: packages/kolibri/components/CoreMenu/__tests__/CoreMenuOption.spec.js
• Testing Library query priority

🤖 This issue was written with AI assistance, under supervision, review and final edits by @rtibbles 🤖