MidnightHealerHelper

• Updated addon compatibility metadata for Interface 120007.
• Centralized secure spell and unit button creation through SecureActionButtonFactory.
• Added a data-driven secure click-casting mapping layer.
• Removed the old override-binding and hidden proxy-button architecture.
• Secure attributes, visibility drivers, parenting and layout changes are now applied out of combat or deferred until PLAYER_REGEN_ENABLED.
• Improved compatibility with both key-down and key-up action settings.
• Improved native-frame and raid-subgroup dragging with combat-safe Ctrl + left-drag handles.
• Removed unnecessary native-frame container chrome and legacy live borders.
• Improved action-button frame depth so native unit frames do not intercept spell-button clicks.

UI and themes

• Enforced the shared W.* widget architecture throughout the settings UI.
• Removed fallback widget construction from UI_Common.lua.
• Removed inline button hover/alpha styling so widget states remain ThemeEngine-owned.
• Preserved all five built-in dashboard themes and live theme switching.
• Improved settings, preview and dashboard consistency.