Record the width of some Protyle elements in the attributes

[TCOTC]

1. 重构 setPadding 函数，修复了编辑器边距动态变化导致 data-realwidth 不准确的问题
2. 移除 #editorAttr 元素，修复了全局标题角标伪元素共用一个 max-width 的问题
3. 添加了几个元素的宽度 CSS 变量 close Record Protyle full width in attributes of .protyle, .protyle-content and .protyle-wysiywg. #15021

[TCOTC]

@Wetoria 经过在 Asri 主题 v3.4.0 测试，可以用变量来代替 JS 计算：

[Copilot]

Pull Request Overview

This PR refactors the setPadding function to fix width calculation issues and improve editor layout management. The changes address dynamic padding changes causing inaccurate data-realwidth attributes and remove a global style element that caused max-width conflicts.

• Refactored width calculations to compute values before setting padding styles
• Introduced CSS custom properties (--b3-width-protyle, --b3-width-protyle-content, --b3-width-protyle-wysiwyg) for better width management
• Removed #editorAttr element and replaced with CSS custom property for bookmark icon tooltips

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
kernel/conf/editor.go	Updated comment for DisplayBookmarkIcon field to clarify it controls content block badge display
app/src/protyle/ui/initUI.ts	Refactored setPadding to compute widths before applying styles, added CSS custom properties, removed dynamic style element generation
app/src/assets/template/desktop/index.tpl	Removed #editorAttr style element
app/src/assets/template/app/window.tpl	Removed #editorAttr style element
app/src/assets/template/app/index.tpl	Removed #editorAttr style element
app/src/assets/scss/protyle/_wysiwyg.scss	Added max-width style using new CSS custom property for tooltip width constraint

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[TCOTC]

@Vanessa219 这样改不对吧，setAttribute 之后再 getAttribute 得到的是同一个数，然后后面 return 的始终是 0。