The loading icon no longer covers the entire cloud configuration page

[TCOTC]

Description / 描述

目前打开页面之后要完全等待 /api/cloud/getCloudSpace 接口完成才能继续操作，有点久，比较麻烦：

video.webm

改进为加载图标不再覆盖整个云端配置页面：

video.webm

Type of change / 变更类型

• Bug fix
  缺陷修复
• Refactoring
  代码重构
• New feature
  新功能
• Text updates or new language additions
  修改文案或增加新语言

Checklist / 检查清单

• I have performed a self-review of my own code
  我对自己的代码进行了自我审查
• I have full rights to the submitted code and agree to license it under this project's AGPL-3.0 license
  我拥有所提交代码的完整权利，并同意其以本项目的 AGPL-3.0 许可证授权
• PR is submitted to the dev branch and has no merge conflicts
  PR 提交到 dev 分支，并且没有合并冲突

[Copilot]

Pull request overview

This PR updates the cloud configuration (sync repos) UI so the loading indicator no longer blocks the entire page while /api/cloud/getCloudSpace is loading, allowing users to continue interacting with other controls.

Changes:

• Replaces the full-page fixed loading overlay with an in-panel loading section rendered inside #reposData.
• Adds a small helper (getReposDataLoadingHTML) to render the non-blocking loading UI.

Comments suppressed due to low confidence (1)

app/src/config/repos.ts:463

• genHTML() no longer wraps the returned markup in a single root element, but bindEvent() still attaches the delegated click handler to repos.element.firstElementChild. With multiple top-level siblings, firstElementChild is now just the first row (sync provider), so clicks on later data-action controls (e.g. config/togglePassword/exportData/purgeData) won’t bubble to the handler and those actions will stop working. Reintroduce a root wrapper element in genHTML() or change the event binding target to repos.element (the container) so delegation covers the full panel.

    genHTML: () => {
        return `<div class="fn__flex b3-label config__item">
    <div class="fn__flex-1">
        ${window.siyuan.languages.syncProvider}
        <div class="b3-label__text">${window.siyuan.languages.syncProviderTip}</div>
    </div>

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[Copilot]

The new loading container uses display: flex without align-items: center. In a row-direction flex container, the default align-items: stretch can cause the <img> to stretch vertically to the container’s min-height (180px), distorting the spinner and misaligning it. Add align-items: center (and optionally constrain the image size) or reuse an existing centered loading style used elsewhere in the app.

Suggested change

	<div style="min-height: 180px; display: flex; justify-content: center;" id="reposLoading">
	<div style="min-height: 180px; display: flex; justify-content: center; align-items: center;" id="reposLoading">