fix: 修复 SNI 懒加载托盘图标右键菜单无法显示的问题

[hotime]

部分 SNI 应用（如 Snipaste）的 DBusMenu 菜单采用懒加载：只有收到 AboutToShow 调用后才填充菜单内容。此前右击托盘图标时从未触发 DBus AboutToShow，右键菜单始终无法显示内容。

修复：右击分支在显示菜单前主动调用 updateMenu(menu) 触发一次 DBus AboutToShow，拉取懒加载菜单内容。

本修复需配合 dde-shell 的对应修复（监听菜单 surface 尺寸变化并重新请求几何更新），使内容异步到达时弹窗能重新布局与绘制。

AI辅助声明：本修复方案由deepseek-v4-flash协助生成，并已在本地完成实际测试验证。

Snipaste下载地址：https://zh.snipaste.com/download.html
测试使用的Snipaste版本：https://download.snipaste.com/archives/Snipaste-2.11.3-x86_64.AppImage

Summary by Sourcery

Bug Fixes:

• Fix missing right-click tray menu contents for SNI applications that lazily populate DBusMenu on AboutToShow.

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: hotime

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[deepin-ci-robot]

Hi @hotime. Thanks for your PR. 😃

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR ensures that DBusMenu-based SNI tray icons with lazy-loaded menus (e.g., Snipaste) correctly populate and display their right-click menus by proactively triggering a DBus AboutToShow via updateMenu() before showing the menu.

Sequence diagram for lazy-loaded SNI tray menu right-click handling

sequenceDiagram
    actor User
    participant SniTrayProtocolHandler
    participant MenuImporter
    participant DBusMenu
    participant SNIApp

    User->>SniTrayProtocolHandler: eventFilter(QEventContextMenu)
    SniTrayProtocolHandler->>MenuImporter: menuImporter()
    MenuImporter-->>SniTrayProtocolHandler: menu
    SniTrayProtocolHandler->>MenuImporter: updateMenu(menu)
    MenuImporter->>DBusMenu: AboutToShow
    DBusMenu->>SNIApp: AboutToShow
    SNIApp-->>DBusMenu: populate_menu_items
    DBusMenu-->>MenuImporter: updated_menu
    SniTrayProtocolHandler->>DBusMenu: setFixedSize(sizeHint)
    SniTrayProtocolHandler->>User: show populated context menu

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File-Level Changes

Change	Details	Files
Proactively trigger DBus AboutToShow for SNI tray menus before displaying them so lazy-loaded menus populate correctly.	In the right-click event handling path, obtain the DBusMenu instance from the menu importer before the menu is shown. Call updateMenu(menu) on the menu importer to force a DBus AboutToShow signal and pull in lazily loaded menu content. Keep the existing logic that fixes the menu size using sizeHint() and ensures the native window ID is created, so geometry and rendering continue to work as before.	plugins/application-tray/sniprotocolhandler.cpp

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[deepin-ci-robot]

Hi @hotime. Thanks for your PR.

I'm waiting for a linuxdeepin member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider adding a null check for menuImporter() and menu before calling updateMenu(menu) to avoid potential crashes in edge cases where the importer or menu is not available.
• If updateMenu(menu) can be relatively expensive or trigger network/IPC calls, it may be worth restricting it to the right-click branch only and ensuring it is not called redundantly in other code paths that also show the menu.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider adding a null check for `menuImporter()` and `menu` before calling `updateMenu(menu)` to avoid potential crashes in edge cases where the importer or menu is not available.
- If `updateMenu(menu)` can be relatively expensive or trigger network/IPC calls, it may be worth restricting it to the right-click branch only and ensuring it is not called redundantly in other code paths that also show the menu.

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[hotime]

dde-shell侧合并请求：linuxdeepin/dde-shell#1699