Improve the line-height of the title blocks in the list

[TCOTC]

Fix #15003

[emptylight370]

这个pr修复之后标题的行高表现和原先旧版本一样吗（导致标题向上偏移的修改前）

[TCOTC]

不知道，你可以试试：

.protyle-wysiwyg [data-node-id].li>.protyle-action~[data-type=NodeHeading] {
    line-height: calc(var(--b3-font-size-editor) * 1.625);
}

[TCOTC]

我管理起来方便，PR 和 issue 有一个开着就行

另外就是这里合并之后没法连带关闭 issue，不知道为什么

[TCOTC]

以后有机会再试试

[Vanessa219]

用 --b3-font-size-editor 无法适配列表设置字体大小的情况。

[TCOTC]

改了一下

[Copilot]

Pull Request Overview

This PR improves the line-height styling for heading blocks within lists by replacing a single fixed line-height value with specific calculations for each heading level (h1-h6). The change addresses visual spacing issues in list items containing headings.

• Replaces fixed line-height: 1em with level-specific calculations
• Provides proportional line-height values that scale with heading importance
• Maintains consistent visual hierarchy within list contexts

[Copilot]

The magic numbers (1.75, 1.55, 1.38, 1.25, 1.13) used in the line-height calculations lack explanation. Consider adding a comment explaining the rationale behind these divisors or defining them as CSS custom properties for better maintainability.

Suggested change

	line-height: calc(1.625em / 1.75);
	}
	&.h2 {
	line-height: calc(1.625em / 1.55);
	}
	&.h3 {
	line-height: calc(1.625em / 1.38);
	}
	&.h4 {
	line-height: calc(1.625em / 1.25);
	}
	&.h5 {
	line-height: calc(1.625em / 1.13);
	line-height: calc(1.625em / var(--line-height-h1));
	}
	&.h2 {
	line-height: calc(1.625em / var(--line-height-h2));
	}
	&.h3 {
	line-height: calc(1.625em / var(--line-height-h3));
	}
	&.h4 {
	line-height: calc(1.625em / var(--line-height-h4));
	}
	&.h5 {
	line-height: calc(1.625em / var(--line-height-h5));