Add getWindowManagerLayoutParams() method to IFxControl interface for dynamic window property control

[Copilot]

This PR adds the requested getWindowManagerLayoutParams(): WindowManager.LayoutParams? method to the IFxControl interface, enabling developers to access and modify window properties for system-level floating windows at runtime.

Problem

Users needed access to the underlying WindowManager.LayoutParams to dynamically control window focus and other properties, particularly for implementing focus control functionality like:

// Previously impossible - no access to WindowManager.LayoutParams
fun requestFocusFloatingView(fxControl: IFxControl, context: Context) {
    val layoutParams = fxControl.getWindowManagerLayoutParams() // ❌ Method didn't exist
    layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL // ❌ Couldn't access
}

Solution

Added getWindowManagerLayoutParams() method that:

• System floating windows: Returns the actual WindowManager.LayoutParams for dynamic modification
• App-level floating windows: Returns null (since they don't use WindowManager.LayoutParams)
• Uninitialized windows: Returns null for safety

Usage Example

fun requestFocusFloatingView(fxControl: IFxControl, context: Context) {
    val managerView = fxControl.getManagerView()
    val layoutParams = fxControl.getWindowManagerLayoutParams() // ✅ New method

    if (layoutParams != null) { // ✅ Safe null check
        layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL or
                             WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH or
                             WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN

        managerView?.post {
            val wm = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
            wm.updateViewLayout(managerView, layoutParams) // ✅ Works perfectly
        }
    }
}

Key Features

• Type Safety: Returns nullable type to distinguish between system and app-level windows
• Thread Safe: Uses ::wl.isInitialized check to prevent access to uninitialized properties
• Backwards Compatible: No breaking changes to existing API
• Well Documented: Clear documentation about when method returns null vs non-null

Implementation Details

• Added method to IFxControl interface with proper KDoc
• Implemented delegation pattern in FxBasisControlImp
• Added property to IFxInternalHelper interface
• Base FxBasicContainerView returns null (for app-level windows)
• FxSystemContainerView overrides to return actual WindowManager.LayoutParams
• Included comprehensive test examples and edge case handling

Fixes #220.

Warning

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