feat: add Windows SMTC (System Media Transport Controls) support

[kt286]

Implement Windows SMTC integration so the system media overlay can display current track info and respond to play/pause/next/previous commands, similar to MPRIS on Linux.

• Add WinSMTC class wrapping WinRT ISystemMediaTransportControls API with playback status sync, metadata (title/artist/album/cover art), and button press event handling
• Create Start Menu shortcut with AppUserModelID for SMTC identification
• Integrate SMTC into PlayerEngine with playback state and metadata sync
• Expose Presenter::playerEngine() for SMTC initialization from main
• Guard MPRIS/DBus adaptor registration with Q_OS_LINUX
• Link WinRT libraries (runtimeobject, ole32, user32, propsys, shell32)

feat: 添加 Windows SMTC（系统媒体传输控件）支持

实现 Windows SMTC 集成，使系统媒体覆盖层可以显示当前曲目信息并响应
播放/暂停/下一曲/上一曲命令，类似 Linux 上的 MPRIS。

• 新增 WinSMTC 类，封装 WinRT ISystemMediaTransportControls API， 支持播放状态同步、元数据（标题/艺术家/专辑/封面）及按键事件处理
• 创建开始菜单快捷方式并设置 AppUserModelID 用于 SMTC 识别
• 在 PlayerEngine 中集成 SMTC，同步播放状态和元数据
• 暴露 Presenter::playerEngine() 供 main 中初始化 SMTC
• 使用 Q_OS_LINUX 守卫 MPRIS/DBus adaptor 注册
• 链接 WinRT 库（runtimeobject、ole32、user32、propsys、shell32）

Summary by Sourcery

Integrate Windows system media controls into the player while preserving Linux-only MPRIS behavior.

New Features:

• Add Windows System Media Transport Controls integration for track metadata, playback state, cover art, and media button commands.

Enhancements:

• Keep Linux MPRIS and DBus integration platform-specific while exposing the player engine for platform media-control initialization.

Build:

• Link the Windows libraries required by SMTC support.

Tests:

• Update player engine and presenter tests to accommodate platform-specific MPRIS initialization.

Chores:

• Create a Windows Start Menu shortcut with an AppUserModelID for SMTC registration.

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kt286

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Reviewer's Guide

Adds Windows System Media Transport Controls (SMTC) integration, wiring WinRT media controls into PlayerEngine and main startup, while keeping existing MPRIS/DBus logic Linux-only and linking required Windows libraries.

Sequence diagram for Windows SMTC initialization and playback sync

sequenceDiagram
    participant Main
    participant Presenter
    participant PlayerEngine
    participant WinSMTC

    Main->>WinSMTC: ensureStartMenuShortcut()
    Main->>Presenter: playerEngine()
    Presenter-->>Main: PlayerEngine*
    Main->>PlayerEngine: setWinSMTC(hwnd)
    PlayerEngine->>WinSMTC: WinSMTC(this)
    PlayerEngine->>WinSMTC: initialize(hwnd)
    WinSMTC-->>PlayerEngine: initialized

    PlayerEngine->>PlayerEngine: resetDBusMpris(meta)
    PlayerEngine->>WinSMTC: updateMetadata(title, artist, album, length, artPath)

    PlayerEngine->>PlayerEngine: [playbackStatusChanged]
    PlayerEngine->>WinSMTC: updatePlaybackStatus(status)

Loading

Sequence diagram for Windows SMTC button handling

sequenceDiagram
    actor User
    participant SystemSMTC
    participant WinSMTC
    participant PlayerEngine

    User->>SystemSMTC: media key press
    SystemSMTC-->>WinSMTC: ButtonPressedEvent
    WinSMTC-->>PlayerEngine: playRequested()
    PlayerEngine->>PlayerEngine: resume() / play() / pauseNow()

    User->>SystemSMTC: next key
    SystemSMTC-->>WinSMTC: ButtonPressedEvent
    WinSMTC-->>PlayerEngine: nextRequested()
    PlayerEngine->>PlayerEngine: playNextMeta(false)

    User->>SystemSMTC: previous key
    SystemSMTC-->>WinSMTC: ButtonPressedEvent
    WinSMTC-->>PlayerEngine: previousRequested()
    PlayerEngine->>PlayerEngine: playPreMeta()

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File-Level Changes

Change	Details	Files
Integrate Windows SMTC control object into PlayerEngine lifecycle and sync playback state/metadata.	Declare WinSMTC member in PlayerEnginePrivate behind Q_OS_WIN guard and clean it up in the destructor. Expose setWinSMTC(void *hwnd) on PlayerEngine to initialize WinSMTC with the main window handle. Wire SMTC play/pause/stop/next/previous signals to existing PlayerEngine slots and playlist logic. Mirror playbackStatus and metadata (title/artist/album/length/art) into SMTC, including enabling/disabling transport buttons based on playlist navigation availability.	src/libdmusic/player/playerengine.cpp src/libdmusic/player/playerengine.h
Expose access to PlayerEngine from Presenter to allow SMTC initialization from the GUI startup path.	Add forward declaration for PlayerEngine in presenter.h. Add playerEngine() const accessor returning m_playerEngine in Presenter. Adjust presenter headers’ SPDX-FileCopyrightText comments.	src/libdmusic/presenter.cpp src/libdmusic/presenter.h
Initialize Windows-specific process/AppUserModelID state and hook SMTC at application startup while guarding Linux-only behaviors.	Include Windows headers in main.cpp under Q_OS_WIN and guard POSIX signal-related includes/handlers with Q_OS_LINUX. Set the process AppUserModelID dynamically via shell32 at startup and call WinSMTC::ensureStartMenuShortcut(). After QML engine load, locate the main QWindow, set its icon, and pass its HWND to presenter->playerEngine()->setWinSMTC(). Guard DBus adaptor registration and SIGTERM handling so they only run on Linux.	src/music-player/main.cpp
Implement WinSMTC helper class wrapping WinRT ISystemMediaTransportControls and handling Start Menu shortcut creation.	Create winsmtc.h defining WinSMTC QObject with initialize/shutdown, metadata/playback status update, and control enabling APIs plus Qt signals for control requests. Implement winsmtc.cpp to obtain ISystemMediaTransportControls for a window via ISystemMediaTransportControlsInterop, set up display metadata/thumbnail via WinRT streams, and update playback status and button capabilities. Implement ButtonDelegate ITypedEventHandler to translate WinRT button events into Qt signals on WinSMTC. Provide static ensureStartMenuShortcut() to create a localized Start Menu .lnk with AppUserModelID and icon, cleaning up older shortcuts.	src/libdmusic/player/winsmtc.h src/libdmusic/player/winsmtc.cpp
Link required WinRT/Windows libraries for SMTC on Windows builds.	Add conditional CMake logic for WIN32 and non-MSVC toolchains to link runtimeobject, ole32, user32, propsys, and shell32. Update SPDX headers in several source files to extend the year range to 2026.	src/libdmusic/CMakeLists.txt src/libdmusic/player/playerengine.cpp src/libdmusic/player/playerengine.h src/libdmusic/presenter.cpp src/libdmusic/presenter.h src/music-player/main.cpp

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[deepin-bot]

TAG Bot

New tag: 7.0.63
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #762

[deepin-bot]

TAG Bot

New tag: 7.0.64
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #765

[deepin-bot]

TAG Bot

New tag: 7.0.65
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #768

[deepin-bot]

TAG Bot

New tag: 7.0.66
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #779