fix: update m_preMaxFlag when window state changes

[Resurgamz]

Add m_preMaxFlag update in changeEvent to ensure tray icon restores correct window size after manual resize operations.

修复窗口状态改变时未更新最大化标志位的问题，确保托盘打开时能正确恢复窗口大小。

Log: 修复托盘打开窗口大小异常的问题
Bug: https://pms.uniontech.com/bug-view-244221.html
Influence: 用户调整窗口大小后，通过托盘打开窗口时能正确恢复之前的大小

Summary by Sourcery

Bug Fixes:

• Fix incorrect window size restoration when reopening the player from the system tray after manually resizing the window.

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR updates the main window’s changeEvent handler so that the pre-maximized-state flag (m_preMaxFlag) is kept in sync with window state changes, while avoiding interference with minimize-to-tray behavior, ensuring that restoring the window from the tray uses the correct size/maximized state after manual resizes.

Flow diagram for updated window state change handling

flowchart TD
    A[QEvent_WindowStateChange received in changeEvent] --> B[stopAnimation on m_playQueueWidget]
    B --> C{isMinimized}
    C -->|true| D[m_preMaxFlag unchanged]
    C -->|false| E[set m_preMaxFlag = isMaximized]
    E --> F[Tray restore uses m_preMaxFlag to restore window size]
    D --> F

Loading

File-Level Changes

Change	Details	Files
Keep the pre-maximized-state flag in sync on window state changes without affecting minimize-to-tray logic.	Add logic in changeEvent to update the pre-maximized-state flag when the window state changes and the window is not minimized Guard the m_preMaxFlag update with an isMinimized check to avoid conflicts with tray minimize behavior	src/music-player/mainFrame/mainframe.cpp

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider casting event to QWindowStateChangeEvent and using its oldState()/newState() to drive m_preMaxFlag updates, so you explicitly track transitions (e.g., avoid relying on isMinimized() checks that happen after the state change).
• The new comment is helpful; consider expanding it slightly to clarify how this logic interacts with the tray minimize/restore path so future maintainers understand why minimization is treated specially.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider casting `event` to `QWindowStateChangeEvent` and using its `oldState()`/`newState()` to drive `m_preMaxFlag` updates, so you explicitly track transitions (e.g., avoid relying on `isMinimized()` checks that happen after the state change).
- The new comment is helpful; consider expanding it slightly to clarify how this logic interacts with the tray minimize/restore path so future maintainers understand why minimization is treated specially.

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: max-lvs, Resurgamz

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Details

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