Modal : Added Titlebar , title , X handling and movable for windows

[iamAbhi-916]

Description

Added Titlebar , title , X handling and movable for windows

Type of Change

• New feature (non-breaking change which adds functionality)

Why

What is the motivation for this change? Add a few sentences describing the context and overall goals of the pull request's commits.

Resolves [Add Relevant Issue Here]
#14067

What

Added JS side hadndling for windows only prop Title .
Passed the prop from js side to native side and handled the behaviour if title has been passed and not
handled closing modal using X
modal is movable
the title can be updated dynamically.

Screenshots

title , X handling and movable and at last with not title in titlebar for windows

modal_final_demo.mp4

Testing

tested in playground

Changelog

yes

Add a brief summary of the change to use in the release notes for the next release.
Added support for a title prop on Windows Modals, allowing a title bar to be displayed.
The modal window can now be closed using the 'X' button, triggering the onRequestClose event.
The title can be updated dynamically.

Microsoft Reviewers: Open in CodeFlow

[anupriya13]

The resize behaviour feels a bit off, perhaps it could use a bit of refinement. Content inside the modal is not resized correctly.

[iamAbhi-916]

The resize behaviour feels a bit off, perhaps it could use a bit of refinement. Content inside the modal is not resized correctly.

yeah, that feature should be implemented separately.
created issue for the same : 14646

[Copilot]

Pull Request Overview

This PR introduces Windows-specific enhancements for Modal functionality by adding support for a title bar, dynamic title updates, and improved X (close) handling, along with enabling window movability.

• Added a new "title" prop on the native and JS sides for Windows Modal.
• Updated codegen and native components to pass and handle the title prop.
• Modified AppWindow handling to include proper cleanup of closing tokens and ensure proper title updates.

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
vnext/src-win/src/private/specs/components/RCTModalHostViewNativeComponent.js	Added the Windows-only title prop in the native component spec.
vnext/src-win/Libraries/Modal/Modal.windows.js	Extended Modal component to include the title prop and pass it downstream.
vnext/overrides.json	Updated mapping for patched Modal type definitions and native component specs.
vnext/codegen/react/components/rnwcore/Props.h, Props.cpp, ModalHostView.g.h	Introduced title property in the codegen files for ModalHostView.
vnext/Microsoft.ReactNative/Fabric/Composition/Modal/WindowsModalHostViewComponentView.cpp	Updated AppWindow handling, including title updates, window centering, and closing token cleanup.
change/react-native-windows-5a8be4f7-4d46-49db-bc56-5b82f2ea97d0.json	Updated the prerelease comment with new functionality details.