#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.21.x
#### What this PR does / why we need it:
This PR adds frontend support for checking whether an slug already exists when creating posts.
Note:
1. The current implementation isn’t perfect, some actions (like clicking the “Publish” button) don’t check for duplicate slug yet.
2. Slug checking in the user center might not be accurate, since it may not have permission to query all posts.
<img width="695" alt="image" src="https://github.com/user-attachments/assets/baa37a82-49c2-43be-a4d8-0e0f22a9d73b" />
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/7615
Fixes https://github.com/halo-dev/halo/issues/3332
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
创建文章时支持检查别名是否重复
```
#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.21.x
#### What this PR does / why we need it:
1. Add ghost variant
2. Improve icon style
3. Refactoring css using scss functions
#### Does this PR introduce a user-facing change?
```release-note
None
```
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#### What type of PR is this?
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/area ui
/kind bug
#### What this PR does / why we need it:
See #6994
#### Which issue(s) this PR fixes:
<!--
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Fixes#6994
#### Special notes for your reviewer:
统一了发布文章时的行为，均先确保服务端创建草稿后保存内容。
#### Does this PR introduce a user-facing change?
<!--
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```release-note
修复文章重复生成的问题
```
#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.18.x
#### What this PR does / why we need it:
为个人中心发布文章的操作添加重试机制，方式后端因为乐观锁出现异常错误。
#### Which issue(s) this PR fixes:
Fixes#6349
#### Does this PR introduce a user-facing change?
```release-note
为个人中心发布文章的操作添加重试机制，方式后端因为乐观锁出现异常错误。
```
#### What type of PR is this?
/area ui
/kind feature
/milestone 2.17.x
#### What this PR does / why we need it:
支持在文章编辑页面创建文章时，也应用别名生成规则
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/5118
Fixes https://github.com/halo-dev/halo/issues/6155
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
支持在文章编辑页面创建文章时，也应用别名生成规则
```
#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.17.x
#### What this PR does / why we need it:
重新组织和固定 UI 部分代码的 imports 导入，防止后续因为 imports 的顺序造成不必要的 diff。
基于：https://github.com/halo-dev/halo/pull/6151
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area ui
/kind bug
/milestone 2.17.x
#### What this PR does / why we need it:
修复新建文章时，没有自动选择之前所选编辑器的问题。
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/6091
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
修复新建文章时，没有自动选择之前所选编辑器的问题。
```
#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.14.x
#### What this PR does / why we need it:
编辑文章匹配编辑器类型时，忽略大小写。
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/5597
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.14.x
#### What this PR does / why we need it:
为 UC 端保存文章的操作添加重试机制，防止出现因为锁导致的保存失败问题。
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/5474
#### Special notes for your reviewer:
需要多次尝试编辑文章，以及设置表单的保存功能。
#### Does this PR introduce a user-facing change?
```release-note
为 UC 端保存文章的操作添加重试机制，防止出现因为锁导致的保存失败问题。
```
#### What type of PR is this?
/area editor
/area ui
/kind feature
#### What this PR does / why we need it:
为默认编辑器添加标题输入框。
<img width="1665" alt="image" src="https://github.com/halo-dev/halo/assets/21301288/df903e02-76b0-45fe-89d9-6ac81af8f041">
#### Which issue(s) this PR fixes:
Fixes#5427
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
为默认编辑器添加标题输入框。
```
#### What type of PR is this?
/kind bug
/area ui
#### What this PR does / why we need it:
在个人中心的文章功能中，点击设置时并不会重新获取最新的 Post 数据，进而导致点击保存时的 `version` 并非最新版本而报错。
此 PR 将在个人中心的文章页面点击设置时，额外增加一次获取最新的 Post 数据的请求，用于解决此问题。
#### How to test it?
1. 进入个人中心
2. 点击文章菜单
3. 点击右上角创建按钮
4. 在编辑器中随便输入内容
5. 点击保存
6. 修改文章的设置后点击保存。
7. 关闭设置框，再次打开设置框，然后点击保存。
8. 查看是否会出现无法保存的问题。
#### Which issue(s) this PR fixes:
Fixes#5344
#### Does this PR introduce a user-facing change?
```release-note
解决个人中心文章设置时报错的问题
```
Ryan Wang