fix: bind hover and pressed states to background

[MyLeeJiEun]

1. Add D.ColorSelector.hovered and D.ColorSelector.pressed properties to the app item background delegate
2. Fix taskbar app retaining selected state after long-press popup is dismissed by clicking desktop blank area

Log: fix taskbar app keeping selected state after dismissing long-press popup

fix: 绑定悬停和按下状态到背景

1. 为应用项背景委托添加 D.ColorSelector.hovered 和 D.ColorSelector.pressed 属性
2. 修复单指长按任务栏应用弹出面板后，点击桌面空白处 任务栏应用依然有选中状态的问题

Log: 修复长按弹出面板关闭后任务栏应用残留选中状态的问题
PMS: BUG-364531

Summary by Sourcery

Bug Fixes:

• Resolve taskbar app items incorrectly remaining in a selected state after dismissing the long-press popup by clicking on the desktop.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Binds the app item background delegate’s hover and press visual states to existing input handlers so taskbar items correctly reset their selected state after dismissing a long-press popup.

Sequence diagram for binding hover and pressed states to background delegate

sequenceDiagram
    actor User
    participant hoverHandler
    participant mouseArea
    participant backgroundDelegate
    participant D_ColorSelector as D_ColorSelector

    User->>hoverHandler: hovered
    hoverHandler-->>backgroundDelegate: hovered
    backgroundDelegate-->>D_ColorSelector: D.ColorSelector.hovered

    User->>mouseArea: press
    mouseArea-->>backgroundDelegate: pressed
    backgroundDelegate-->>D_ColorSelector: D.ColorSelector.pressed

    User->>User: [popup dismissed by clicking desktop]
    mouseArea-->>backgroundDelegate: pressed false
    backgroundDelegate-->>D_ColorSelector: D.ColorSelector.pressed false

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File-Level Changes

Change	Details	Files
Bind color selector hover/pressed states to input handlers on taskbar app items to fix lingering selected state.	Expose the app item hover state via D.ColorSelector.hovered bound to hoverHandler.hovered. Expose the app item pressed state via D.ColorSelector.pressed bound to mouseArea.pressed. Ensure background delegate visual state updates when the long-press popup is dismissed by interacting with the desktop.	panels/dock/taskmanager/package/AppItem.qml

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider verifying that hoverHandler and mouseArea cover the same visual region as the app item background; if their geometries differ, the new D.ColorSelector.hovered/pressed bindings could desynchronize background feedback from the actual interactive area.
• To improve readability, you might group the new D.ColorSelector.hovered and D.ColorSelector.pressed bindings with any other state-related properties (e.g. isActive, displayMode) or add a short comment explaining that these are wired to the background’s visual states.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider verifying that `hoverHandler` and `mouseArea` cover the same visual region as the app item background; if their geometries differ, the new `D.ColorSelector.hovered/pressed` bindings could desynchronize background feedback from the actual interactive area.
- To improve readability, you might group the new `D.ColorSelector.hovered` and `D.ColorSelector.pressed` bindings with any other state-related properties (e.g. `isActive`, `displayMode`) or add a short comment explaining that these are wired to the background’s visual states.

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mhduiy, MyLeeJiEun

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[MyLeeJiEun]

/merge

[deepin-bot]

This pr cannot be merged! (status: blocked)