Completes Step 2 of FN-3042 by scaling board typography styles across TaskCard and QuickEntryBox components, adding a new CustomModelDropdown stylesheet, and introducing keyboard focus-visible styles for theme selector controls. The merge includes new regression tests for board font scaling, resolve
Fusion-Task-Id: FN-3042
- Define --surface-hover in base styles and in theme-data.css across color theme variants
- Normalize dashboard styles and tests to rely on the explicit hover token instead of ad-hoc fallbacks
- Add regression coverage in status-colors-theme tests to verify surface-hover is present for all themes/modes
- Update TaskDetailModal test expectations to align with the new hover token behavior
- Extract all color-theme CSS variable blocks from styles.css into a dedicated theme-data.css file
- Add dynamic loading of theme-data.css for non-default color themes via useTheme hook
- Preload theme-data.css for the default theme in index.html to avoid flash
- Update status-colors-theme tests for dynamic theme loading behavior
- Update memory and README with theme-data.css file location
