Add header text style and disable double-click navigation in grids

[brYch97]

Breaking Changes

Double-Click Navigation Disabled in Editable Grids

This PR removes double-click navigation functionality from editable grids. Users can no longer double-click on cells to open a record.

Rationale

Double-click navigation was creating confusion in editable grids where:

• Double-clicking read-only columns was used for navigation
• Double-clicking editable columns was used for inline editing

These conflicting interactions made the UX ambiguous and error-prone.

Migration Guide

To maintain record navigation in editable grids, you must:

1. Designate a Primary Name Attribute — Define a column as the primary link column in your column definition by marking it with the isPrimary flag
2. Navigate via Link — Users can click on the primary name attribute link to navigate to the record

Additional Improvements

• Improved header text styling in the Edit Columns panel with proper text wrapping