Refactor/stop hover css tokens

[nehayadav827]

Summary

This PR introduces CSS design tokens for stop icon and hover colors and migrates related toolbar/activity theme color reads away from the legacy platformColor object.

It also updates the AI debugger Jest fixture to reflect the existing explicit-consent behavior so the full Jest suite passes on this branch.

No behavioral changes intended.

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Changes

css/tokens.css

Added new theme-aware CSS custom properties:

• --mb-stop-icon-color
• --mb-hover-color

for:

• light theme
• dark theme
• high-contrast theme

css/themes.css

• imports tokens.css

js/toolbar.js

Replaced:

• platformColor.stopIconcolor
• platformColor.hoverColor

with CSS token lookups using getComputedStyle().

js/activity.js

Replaced all remaining:

• platformColor.stopIconcolor

reads with CSS token lookups.

js/widgets/tests/aidebugger.test.js

Updated AI debugger consent-flow tests to reflect the existing explicit-consent requirement before sending project data.

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Validation

Verification

Confirmed that:

• toolbar/activity now read stop and hover colors from CSS tokens
• no targeted platformColor.stopIconcolor or platformColor.hoverColor references remain
• stop buttons continue rendering correctly in the UI after pressing Play

Automated checks

• npm test

  • 160 suites passed
  • 5349 tests passed

• npm run lint

  • passes with existing repository warnings only

• npx prettier --check

  • all matched files use Prettier code style

Attached screenshots include:

• commit/stat summary of the migration
• grep verification showing removal of targeted platformColor references

• token definitions and themes.css import

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PR Category

• Bug Fix
• Feature
• Performance
• Tests
• Documentation

---

Issue

Partially addresses #6606

[github-actions]

🧪 Jest Test Results

✅ All Jest tests passed! This PR is ready to merge.

Coverage: Statements: 48.04% | Branches: 39.52% | Functions: 52.82% | Lines: 48.44%
Master Coverage: Statements: 48.11% | Branches: 39.52% | Functions: 52.84% | Lines: 48.52%