fix(compass-collection): Mock Data Generator QA items - CLOUDP-356791

[ckramer10]

Description

Addresses the following QA items:

• Ensure highlighting of active field in dark mode
• Remove the Confirm Mappings CTA
• Update the copy for schema editor screen to read "We analyzed a sample of your data and used generative AI to suggest the following mapping between your document fields and data simulation functions. Learn more about MongoDB’s AI usage"

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• If this change updates the UI, screenshots/videos are added and a design review is requested
• If this change could impact the load on the MongoDB cluster, please describe the expected and worst case impact
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[Copilot]

Pull Request Overview

This PR addresses QA feedback for the Mock Data Generator feature in Compass by improving UI consistency and user experience. The changes focus on visual improvements for dark mode, simplifying navigation, and updating documentation copy to be more user-friendly.

Key changes:

• Enhanced dark mode support with proper active field highlighting using green color scheme
• Removed "Confirm mappings" button to streamline the workflow
• Updated copy to be more concise and include a link to MongoDB's AI usage FAQ

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
schema-field-selector.tsx	Added dark mode active state styling with green background and removed hardcoded color from label
faker-schema-editor-screen.tsx	Removed "Confirm mappings" button, updated component structure to use semantic HTML components (H3, Description), and revised copy with new AI usage link
faker-mapping-selector.tsx	Removed hardcoded color from label styles for better theme consistency
mock-data-generator-modal.spec.tsx	Updated test to reflect button text change from "Confirm mappings" to "Next"

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