test(e2e): add Vue error logging test cases

[chenjiahan]

Summary

Add test cases for Vue runtime error logging to verify error forwarding to terminal.

Related Links

• feat: display browser runtime errors in the terminal #6251

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Copilot]

Pull Request Overview

This PR adds end-to-end test cases to verify that Vue runtime errors are properly forwarded from the browser to the terminal during development. The tests cover two common error scenarios: accessing properties of undefined variables and calling methods on null objects.

• Creates Vue components that intentionally trigger runtime errors
• Tests error forwarding for both render-time and event-handler errors
• Validates that error messages appear in the terminal with correct formatting

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
e2e/cases/browser-logs/vue-error/src/undefinedError.js	Entry point for testing undefined property access errors
e2e/cases/browser-logs/vue-error/src/eventError.js	Entry point for testing event handler errors
e2e/cases/browser-logs/vue-error/src/UndefinedError.vue	Vue component that triggers undefined property access error
e2e/cases/browser-logs/vue-error/src/EventError.vue	Vue component that triggers null method call error in click handler
e2e/cases/browser-logs/vue-error/rsbuild.config.ts	Configuration file setting up Vue plugin and multiple entry points
e2e/cases/browser-logs/vue-error/index.test.ts	Test file verifying error forwarding behavior

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