fix: the recorder taskbar incorrect background-color

[add-uos]

Log: fix the recorder taskbar incorrect background-color Bug: https://pms.uniontech.com/bug-view-267669.html

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在updateIcon函数中，m_pixmap的尺寸从水平变为垂直，需要确认这是否符合设计要求。
• 在paintEvent函数中，将setOpacity的值从0.5更改为0，这可能会导致控件的透明度变为完全透明，需要确认这是否是预期的行为。

是否建议立即修改:

• 是，需要确认updateIcon和paintEvent中的更改是否符合设计要求，并确保它们不会导致控件的行为异常。

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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[add-uos]

/merge

[deepin-bot[bot]]

This pr cannot be merged! (status: unknown)