#### What type of PR is this?
/kind feature
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR provides an endpoint for disconnecting user connection. After the user connection is disconnected, an event `UserConnectionDisconnectedEvent` will be published for plugins.
Now, OAuth2 plugin can simplify the authentication, binding and unbinding logic, please see the AuthProvider configuration snippet below:
```diff
spec:
authenticationUrl: /oauth2/authorization/github
- bindingUrl: /apis/api.plugin.halo.run/v1alpha1/plugins/plugin-oauth2/connect/github
+ bindingUrl: /oauth2/authorization/github
- unbindUrl: /apis/api.plugin.halo.run/v1alpha1/plugins/plugin-oauth2/disconnect/github
+ unbindUrl: /apis/uc.api.auth.halo.run/v1alpha1/user-connections/github/disconnect
```
Please note that, OAuth2 plugin can also define binding and unbinding endpoints by self.
#### Special notes for your reviewer:
OAuth2 test plugin:
[plugin-oauth2-1.0.4-SNAPSHOT.zip](https://github.com/user-attachments/files/17184215/plugin-oauth2-1.0.4-SNAPSHOT.zip)
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/milestone 2.20.x
/area core
/kind improvement
#### What this PR does / why we need it:
允许通过 `halo.security.basic-auth.disabled=true` 配置来禁用 Basic Auth 认证
#### Which issue(s) this PR fixes:
Fixes#5408
#### Does this PR introduce a user-facing change?
```release-note
允许通过 `halo.security.basic-auth.disabled=true` 配置来禁用 Basic Auth 认证，在 2.20 版本生产环境下默认禁用了 Basic Auth
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
备份时忽略缩略图目录
#### Which issue(s) this PR fixes:
Fixes#6717
#### Does this PR introduce a user-facing change?
```release-note
备份时忽略缩略图目录以减少文件大小
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR add support for binding OAuth2 user automatically. So we can remove the user-binding page.
Please note that those changes may break the OAuth2 and SocialLogin plugins.
#### Special notes for your reviewer:
Build OAuth2 plugin from <https://github.com/halo-sigs/plugin-oauth2/pull/64> or use [plugin-oauth2-1.0.4-SNAPSHOT.zip](https://github.com/user-attachments/files/17177592/plugin-oauth2-1.0.4-SNAPSHOT.zip) I built.
- Bind after logging in
1. Log in Halo with username and password method
2. Try to unbind OAuth2 user
3. Bind OAuth2 user again
- Initially bind without logging in
1. Go to login page
2. Log in with OAuth2 method and you will be redirected to login page
3. Log in with username and password method
4. See the result of binding
- Log in with OAuth2 method after binding
1. Go to login page
2. Log in with OAuth2 method and you will be redirected to uc page directly
#### Does this PR introduce a user-facing change?
```release-note
支持自动绑定 OAuth2 登录用户
```
#### What type of PR is this?
/kind bug
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR adds confirmPassword field into SignUpData for validation. So the signup page can be rendered correctly.
See https://github.com/halo-dev/halo/issues/6718 for more.
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/6718
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area core
/kind improvement
/milestone 2.20.x
#### What this PR does / why we need it:
完善新登录相关页面的多语言资源文件。
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/6721
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area core
/kind improvement
/milestone 2.20.x
#### What this PR does / why we need it:
移除在 Edge 浏览器中，为密码输入框添加显示密码明文按钮。
<img width="406" alt="image" src="https://github.com/user-attachments/assets/49801c25-d8dc-46db-9cba-302653af1951">
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
将索引构建状态添加到就绪检测的指标中
#### Which issue(s) this PR fixes:
Fixes#6632
#### Does this PR introduce a user-facing change?
```release-note
将索引构建状态添加到就绪检测的指标中以优化就绪时访问出现索引不可用的问题
```
#### What type of PR is this?
/milestone 2.20.x
/area core
#### What this PR does / why we need it:
将内容管理相关的数据更新类归档到 content 包下,如访问量和评论量统计
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
修复文章封面图链接包含空格时主题端会因为生成缩略图错误而无法访问的问题
这是由于 URI string 中包含空格无法创建 URI 对象,目前将忽略这种非法参数,如果生成失败则直接返回原始 URI string
#### Which issue(s) this PR fixes:
Fixes#6690
#### Does this PR introduce a user-facing change?
```release-note
修复文章封面图链接包含空格时主题端会因为生成缩略图错误而无法访问的问题
```
#### What type of PR is this?
/kind feature
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR registers a ServerWebExchangeContextFilter to make ServerWebExchange available under ContextView. The usage example is as follows:
```java
Mono.deferContextual(contextView -> {
var exchange = ServerWebExchangeContextFilter.getExchange(contextView);
assertTrue(exchange.isPresent());
return mono;
})
```
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind bug
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
修复文件上传时类型校验失效的问题
此问题由 #6390 导致
#### Does this PR introduce a user-facing change?
```release-note
修复文件上传时类型校验失效的问题
```
#### What type of PR is this?
/kind cleanup
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR upgrades to [Spring Boot 3.4.0-M3](https://github.com/spring-projects/spring-boot/releases/tag/v3.4.0-M3).
1. Fix the compilation error of OptimalPropertyAccess because the class has been privated in [this commit](b431594021).
2. Fix exception `org.mockito.exceptions.misusing.UnnecessaryStubbingException` for some unit tests after upgrading.
3. Replace deprecated annotations `@MockBean` and `@SpyBean` with `@MockitoBean` and `@MockitoSpyBean` respectively.
#### Does this PR introduce a user-facing change?
```release-note
升级 Spring Boot 至 3.4.0-M3
```
#### What type of PR is this?
/kind improvement
/area core
/area theme
#### What this PR does / why we need it:
This PR removes ReactivePropertyAccessor because it use `AstUtils#getPropertyAccessorsToTry` which is already hidden in [the commit](33fbd7141d (diff-deaf3517fbd66f40a8717877a8328dee0fb2581dfb6be487f327dc73ea33b5b5)). If we upgraded to Spring Boot 3.4.0-M3, the code in ReactivePropertyAccessor would be broken.
More importantly, I believe there is one issue with the current implementation although it can resolve the reactive issue.
- The PropertyAccessor modified the process flow of SPEL
This PR provides some wrappers to wrap existing PropertyAccessor and MethodResolver to evaluate reactive return value.
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind improvement
/area core
/area plugin
/milestone 2.20.x
#### What this PR does / why we need it:
Plugins can implement their own RouterFunctions and ControllerMappings, but those might expose root ApplicationContext for plugins, which is not expected.
So this PR fixes the insecure access to root ApplicationContext.
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind improvement
/area core
/area plugin
/milestone 2.20.x
#### What this PR does / why we need it:
This PR disables access to ApplicationContext using ITemplateContext.
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR adds chunked transfer support for rendering templates, which means that the max memory used by rendering template will be max chunk size instead of size of rendering result.
Users can define the max chunk size like below:
```yaml
spring:
thymeleaf:
reactive:
maxChunkSize: 8KB # Setting to 0 will disable the chunked response.
```
#### Special notes for your reviewer:
1. Try to start Halo instance
2. Execute the command like below and see if the response headers contain `transfer-encoding: chunked`:
```bash
http http://localhost:8090/ -p h
HTTP/1.1 200 OK
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Content-Language: en-CN
Content-Type: text/html
Expires: 0
Pragma: no-cache
Referrer-Policy: strict-origin-when-cross-origin
Vary: Origin
Vary: Access-Control-Request-Method
Vary: Access-Control-Request-Headers
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 0
content-encoding: gzip
set-cookie: XSRF-TOKEN=1e677724-ce82-4b63-911c-f78b22cd9169; Path=/
transfer-encoding: chunked
```
#### Does this PR introduce a user-facing change?
```release-note
优化模板渲染时所需的内存
```
#### What type of PR is this?
/milestone 2.20.x
/area core
#### What this PR does / why we need it:
替换 Version 过时方法的引用为新 API
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind feature
/milestone 2.20.x
/area theme
#### What this PR does / why we need it:
主题支持通过 `${site.version}` 得到 Halo 版本号
#### Which issue(s) this PR fixes:
Fixes#6676
#### Does this PR introduce a user-facing change?
```release-note
主题支持通过 `${site.version}` 得到 Halo 版本号
```
#### What type of PR is this?
/kind feature
/area plugin
#### What this PR does / why we need it:
This PR provides an interface ElementTagProcessor to make plugin handle element tag easily. e.g.:
```java
public class ImgTagProcessor implements ElementTagPostProcessor {
@Override
public Mono<Void> process(ITemplateContext context, IProcessableElementTag tag,
IElementTagStructureHandler structureHandler) {
var elementName = tag.getElementDefinition().getElementName();
if (!Objects.equals("img", elementName.getElementName())) {
return Mono.empty();
}
var srcAttr = tag.getAttribute("src");
if (srcAttr == null) {
return Mono.empty();
}
var newSrc = srcAttr.getValue();
// TODO rewrite src
structureHandler.setAttribute("src", newSrc);
return Mono.empty();
}
}
```
After PR merged, plugins https://github.com/webp-sh/halo-plugin-webp-cloud and https://github.com/guqing/plugin-cloudinary can be refined with new method.
#### Does this PR introduce a user-facing change?
```release-note
支持在插件中操作渲染结果
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
If we are running Halo instance in machine with small memory available, the JS/CSS bundle might not be accessible.
This RP refactors generation of JS and CSS bundle with fixed buffer size rather than length of original resources.
```java
2024-09-02T15:01:27.667+08:00 WARN 62039 --- [boundedElastic-3] reactor.core.Exceptions : throwIfFatal detected a jvm fatal exception, which is thrown and logged below:
java.lang.OutOfMemoryError: Java heap space
at java.base/java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:64) ~[na:na]
at java.base/java.nio.ByteBuffer.allocate(ByteBuffer.java:363) ~[na:na]
at org.springframework.core.io.buffer.DefaultDataBuffer.allocate(DefaultDataBuffer.java:234) ~[spring-core-6.1.12.jar:6.1.12]
at org.springframework.core.io.buffer.DefaultDataBuffer.setCapacity(DefaultDataBuffer.java:196) ~[spring-core-6.1.12.jar:6.1.12]
at org.springframework.core.io.buffer.DefaultDataBuffer.ensureWritable(DefaultDataBuffer.java:228) ~[spring-core-6.1.12.jar:6.1.12]
at org.springframework.core.io.buffer.DefaultDataBuffer.write(DefaultDataBuffer.java:296) ~[spring-core-6.1.12.jar:6.1.12]
at org.springframework.core.io.buffer.DefaultDataBuffer.write(DefaultDataBuffer.java:289) ~[spring-core-6.1.12.jar:6.1.12]
at org.springframework.core.io.buffer.DefaultDataBuffer.write(DefaultDataBuffer.java:43) ~[spring-core-6.1.12.jar:6.1.12]
at run.halo.app.core.extension.service.impl.PluginServiceImpl.lambda$uglifyJsBundle$17(PluginServiceImpl.java:257) ~[classes/:na]
at run.halo.app.core.extension.service.impl.PluginServiceImpl$$Lambda$4661/0x000000c80214e298.accept(Unknown Source) ~[na:na]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:196) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxUsing$UsingFuseableSubscriber.onNext(FluxUsing.java:353) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxGenerate$GenerateSubscription.next(FluxGenerate.java:178) ~[reactor-core-3.6.9.jar:3.6.9]
at org.springframework.core.io.buffer.DataBufferUtils$ReadableByteChannelGenerator.accept(DataBufferUtils.java:1002) ~[spring-core-6.1.12.jar:6.1.12]
at org.springframework.core.io.buffer.DataBufferUtils$ReadableByteChannelGenerator.accept(DataBufferUtils.java:974) ~[spring-core-6.1.12.jar:6.1.12]
at reactor.core.publisher.FluxGenerate.lambda$new$1(FluxGenerate.java:58) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxGenerate$$Lambda$4155/0x000000c802069228.apply(Unknown Source) ~[na:na]
at reactor.core.publisher.FluxGenerate$GenerateSubscription.slowPath(FluxGenerate.java:271) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxGenerate$GenerateSubscription.request(FluxGenerate.java:213) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxUsing$UsingFuseableSubscriber.request(FluxUsing.java:320) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.request(FluxPeekFuseable.java:144) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxFlatMap$FlatMapInner.onSubscribe(FluxFlatMap.java:968) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onSubscribe(FluxPeekFuseable.java:178) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxUsing$UsingFuseableSubscriber.onSubscribe(FluxUsing.java:347) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxGenerate.subscribe(FluxGenerate.java:85) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxUsing.subscribe(FluxUsing.java:102) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.Flux.subscribe(Flux.java:8848) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:430) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxHandleFuseable$HandleFuseableSubscriber.tryOnNext(FluxHandleFuseable.java:135) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxIterable$IterableSubscriptionConditional.slowPath(FluxIterable.java:664) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxIterable$IterableSubscriptionConditional.request(FluxIterable.java:623) ~[reactor-core-3.6.9.jar:3.6.9]
at reactor.core.publisher.FluxHandleFuseable$HandleFuseableSubscriber.request(FluxHandleFuseable.java:260) ~[reactor-core-3.6.9.jar:3.6.9]
2024-09-02T15:01:27.681+08:00 DEBUG 62039 --- [boundedElastic-3] a.w.r.e.AbstractErrorWebExceptionHandler : [131a559b-102] Resolved [OutOfMemoryError: Java heap space] for HTTP GET /apis/api.console.halo.run/v1alpha1/plugins/-/bundle.js
2024-09-02T15:01:27.681+08:00 ERROR 62039 --- [boundedElastic-3] a.w.r.e.AbstractErrorWebExceptionHandler : [131a559b-102] 500 Server Error for HTTP GET "/apis/api.console.halo.run/v1alpha1/plugins/-/bundle.js?v=1725260408176"
java.lang.OutOfMemoryError: Java heap space
at java.base/java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:64) ~[na:na]
```
#### Does this PR introduce a user-facing change?
```release-note
优化在内存紧张时 Console 端无法加载插件资源的问题
```
#### What type of PR is this?
/kind cleanup
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
删除 SubscriptionServiceIntegrationTest 类。因为当前测试类不经常性出错，暂时无法排查原因。
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
修复 external-url 配置带了尾部斜杠导致邮件通知的查看通知链接无法访问的问题
#### Which issue(s) this PR fixes:
Fixes#6655
#### Does this PR introduce a user-facing change?
```release-note
修复 external-url 配置带了尾部斜杠导致邮件通知的查看通知链接无法访问的问题
```
#### What type of PR is this?
/kind feature
/area theme
/sig docs
/milestone 2.20.x
#### What this PR does / why we need it:
After this PR, we can define i18n message files next to the template file.
```yaml
i18n:
default.properties
templates:
index.html
index.properties # Higher properties than default.properties
index_zh.properties # Higher properties than index.properties
index_zh_CN.properties # Higher priority than index_zh.properties
```
It's convenient for plugins that define the template files.
See https://www.thymeleaf.org/doc/tutorials/3.1/usingthymeleaf.html#standard-message-resolver for more.
#### Does this PR introduce a user-facing change?
```release-note
支持在主题中通过 Thymeleaf 默认行为实现国际化
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR adds support changing locale using query `language`. After passing the query, we will automatically respond a cookie `language` back to browser.
Please see the result below:
```bash
http http://localhost:8090/\?language\=zh-CN Accept:text/html -p h
HTTP/1.1 200 OK
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Content-Language: zh-CN
Content-Type: text/html
Expires: 0
Pragma: no-cache
Referrer-Policy: strict-origin-when-cross-origin
Vary: Origin
Vary: Access-Control-Request-Method
Vary: Access-Control-Request-Headers
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 0
content-encoding: gzip
content-length: 4765
set-cookie: language=zh-CN; Path=/; Secure
set-cookie: XSRF-TOKEN=f0f2c972-0024-4575-aef2-0609356b4757; Path=/
```
#### Does this PR introduce a user-facing change?
```release-note
支持利用参数 language 切换地域语言
```
#### What type of PR is this?
/kind improvement
/area theme
/milestone 2.20.x
#### What this PR does / why we need it:
This PR simplifies ThemeLocaleContextResolver by removing unused attributes.
In another PR <https://github.com/halo-dev/halo/pull/6647>, fixed locale resolution for query parameter `language`. This PR fixes locale resolution for cookie `language` as well.
Please see the results below:
```bash
http https://www.halo.run/ Cookie:language=zh-CN -p h
HTTP/1.1 200 OK
Content-Language: und
```
```bash
http http://localhost:8090 Cookie:language=zh-CN -p h
HTTP/1.1 200 OK
Content-Language: zh-CN
```
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
不允许回复未通过审核的评论
#### Does this PR introduce a user-facing change?
```release-note
禁止非管理员回复未通过审核的评论
```
#### What type of PR is this?
/kind bug
/area theme
/milestone 2.20.x
#### What this PR does / why we need it:
If we pass a query `language` while requesting index page, we will get the wrong header `Content-Language`. Please see the result below:
```bash
http https://www.halo.run/\?language\=zh-CN -p h
HTTP/1.1 200 OK
Content-Language: und
...
```
After fixing, we will get the right header `Content-Language`.
```bash
http http://localhost:8090/\?language\=zh-CN -p h
HTTP/1.1 200 OK
Content-Language: zh-CN
...
```
#### Does this PR introduce a user-facing change?
```release-note
修复主题端区域和语言解析错误的问题
```
#### What type of PR is this?
/kind feature
/area core
/area plugin
/milestone 2.20.x
#### What this PR does / why we need it:
Currently, we are refactoring login and logout pages to make them extensible. If plugins want to realize a new authentication method, the CryptoService and RateLimiterRegistry may be used to authenticate.
So this PR exposes the two beans to plugins. No side effect will be introduced.
#### Does this PR introduce a user-facing change?
```release-note
【开发相关】允许在插件使用 CryptoService 和 RateLimiterRegistry
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
优化根据 URI 生成缩略图时的请求头
1. 由于之前 attachment 的 permalink 是 `URI.toString` 会导致根据 permalink 索引查询附件可能由于编码问题无法查询到导致生成缩略图只能根据 URI 生成
2. 可能配置了 nginx 判断请求头不允许脚本请求如导致根据 URI 访问图片无法访问导致无法生成，如
```
if ($http_user agent ~*(python curlljava wget go-http-client httpclient okhttp)){
}
```
Fixes#6627
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind bug
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR filters blank role name while granting roles for an user to prevent null role in permissions.
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/6604
#### Does this PR introduce a user-facing change?
```release-note
修复取消用户角色后无法正常渲染用户列表的问题
```
#### What type of PR is this?
/kind bug
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
修复 GIF 缩略图生成只会保留第一帧的问题
#### Which issue(s) this PR fixes:
Fixes#6596
#### Does this PR introduce a user-facing change?
```release-note
修复 GIF 缩略图生成只会保留第一帧的问题
```
#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
当生成缩略图时如果原图尺寸小于请求尺寸则返回原图以保持其质量
#### Which issue(s) this PR fixes:
Fixes#6579
#### Does this PR introduce a user-facing change?
```release-note
当生成缩略图时如果原图尺寸小于请求尺寸则返回原图以保持其质量
```
#### What type of PR is this?
/kind bug
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
This PR add keyword synchronized for methods `addOrUpdateDocuments`, `deleteDocuments` and `deleteAll` to ensure the write lock of Lucene is obtained only by one IndexWriter at the same time.
#### Which issue(s) this PR fixes:
Fixes#6569
#### Does this PR introduce a user-facing change?
```release-note
修复重启后无法搜索部分文档的问题
```
#### What type of PR is this?
/area core
/kind improvement
/milestone 2.19.0
#### What this PR does / why we need it:
将缩略图生成的模式改为自动，速度优先会导致图片失真率较高，部分图片在 w1600 的尺寸下看起来会比较模糊。
#### Does this PR introduce a user-facing change?
```release-note
None
```
John Niang