Release v1.2.0

[1.2.0] - 2025-07-31

Added

• Smart layout detection system that automatically chooses between custom
  layout and TTK PanedWindow based on pane configuration.
• Custom layout manager for windows with fixed panes that eliminates
  interactive sash handles.
• Visual sash separators for custom layout that provide visual feedback
  without resize functionality.
• Enhanced detach/reattach functionality that properly handles both
  layout types.

Changed

• BREAKING BEHAVIOR: Fixed panes (fixed_width or resizable=False)
  now use custom layout without interactive sash handles.
• Center pane now properly expands to fill remaining space when other
  panes are detached.
• Improved pane reattachment to restore original positions correctly.
• Updated type stubs to reflect new internal architecture and methods.

Fixed

• Sash handles no longer appear for fixed-width panes, preventing
  unwanted resizing.
• Fixed issue where fixed panes could still be resized via sash dragging.
• Improved layout calculations to handle detached panes correctly.
• Enhanced window resize behavior for mixed resizable/fixed pane
  configurations.

Documentation

• Comprehensive API Documentation: Complete docstring improvements
  across the entire codebase following Google/NumPy style conventions
• Enhanced class documentation for PaneConfig, DetachedWindow, and
  FixedThreePaneLayout with detailed parameter descriptions
• Improved method documentation with proper Args: and Returns: sections
  for all public API methods
• Added detailed documentation for utility functions in the utils package
• Professional-grade documentation standards applied throughout

Infrastructure

• GitHub Actions Security: Fixed missing permissions in workflow files
  for secure PyPI publishing
• Added proper id-token: write permissions for trusted publishing
• Enhanced workflow security compliance
• Added stub package release workflow for type hint distribution