fix: 新增端口指定

This reverts commit 4821b77c17.

backend/pom.xml

@@ -132,6 +132,19 @@
       <artifactId>springdoc-openapi-starter-webmvc-api</artifactId>
       <version>2.2.0</version>
     </dependency>
+    <!-- 高阶 Java 客户端 -->
+    <dependency>
+      <groupId>org.opensearch.client</groupId>
+      <artifactId>opensearch-java</artifactId>
+      <version>3.2.0</version>
+    </dependency>
+
+    <!-- 低阶 RestClient，提供 org.opensearch.client.RestClient 给你的 RestClientTransport 用 -->
+    <dependency>
+      <groupId>org.opensearch.client</groupId>
+      <artifactId>opensearch-rest-client</artifactId>
+      <version>3.2.0</version>
+    </dependency>
   </dependencies>
 
   <build>

backend/src/main/java/com/openisle/controller/SearchController.java

@@ -115,6 +115,9 @@ public class SearchController {
         dto.setSubText(r.subText());
         dto.setExtra(r.extra());
         dto.setPostId(r.postId());
+        dto.setHighlightedText(r.highlightedText());
+        dto.setHighlightedSubText(r.highlightedSubText());
+        dto.setHighlightedExtra(r.highlightedExtra());
         return dto;
       })
       .collect(Collectors.toList());

backend/src/main/java/com/openisle/controller/TagController.java

@@ -100,18 +100,32 @@ public class TagController {
   )
   public List<TagDto> list(
     @RequestParam(value = "keyword", required = false) String keyword,
+    @RequestParam(value = "page", required = false) Integer page,
+    @RequestParam(value = "pageSize", required = false) Integer pageSize,
     @RequestParam(value = "limit", required = false) Integer limit
   ) {
     List<Tag> tags = tagService.searchTags(keyword);
     List<Long> tagIds = tags.stream().map(Tag::getId).toList();
     Map<Long, Long> postCntByTagIds = postService.countPostsByTagIds(tagIds);
+    if (postCntByTagIds == null) {
+      postCntByTagIds = java.util.Collections.emptyMap();
+    }
+    Map<Long, Long> finalPostCntByTagIds = postCntByTagIds;
     List<TagDto> dtos = tags
       .stream()
-      .map(t -> tagMapper.toDto(t, postCntByTagIds.getOrDefault(t.getId(), 0L)))
+      .map(t -> tagMapper.toDto(t, finalPostCntByTagIds.getOrDefault(t.getId(), 0L)))
       .sorted((a, b) -> Long.compare(b.getCount(), a.getCount()))
       .collect(Collectors.toList());
+    if (page != null && pageSize != null && page >= 0 && pageSize > 0) {
+      int fromIndex = page * pageSize;
+      if (fromIndex >= dtos.size()) {
+        return java.util.Collections.emptyList();
+      }
+      int toIndex = Math.min(fromIndex + pageSize, dtos.size());
+      return new java.util.ArrayList<>(dtos.subList(fromIndex, toIndex));
+    }
     if (limit != null && limit > 0 && dtos.size() > limit) {
-      return dtos.subList(0, limit);
+      return new java.util.ArrayList<>(dtos.subList(0, limit));
     }
     return dtos;
   }

backend/src/main/java/com/openisle/dto/SearchResultDto.java

@@ -12,4 +12,7 @@ public class SearchResultDto {
   private String subText;
   private String extra;
   private Long postId;
+  private String highlightedText;
+  private String highlightedSubText;
+  private String highlightedExtra;
 }

backend/src/main/java/com/openisle/search/NoopSearchIndexer.java

@@ -0,0 +1,14 @@
+package com.openisle.search;
+
+public class NoopSearchIndexer implements SearchIndexer {
+
+  @Override
+  public void indexDocument(String index, SearchDocument document) {
+    // no-op
+  }
+
+  @Override
+  public void deleteDocument(String index, Long id) {
+    // no-op
+  }
+}

backend/src/main/java/com/openisle/search/OpenSearchConfig.java

@@ -0,0 +1,78 @@
+package com.openisle.search;
+
+import org.apache.hc.client5.http.auth.AuthScope;
+import org.apache.hc.client5.http.auth.UsernamePasswordCredentials;
+import org.apache.hc.client5.http.impl.auth.BasicCredentialsProvider;
+import org.apache.hc.core5.http.HttpHost;
+import org.opensearch.client.RestClient;
+import org.opensearch.client.RestClientBuilder;
+import org.opensearch.client.json.jackson.JacksonJsonpMapper;
+import org.opensearch.client.opensearch.OpenSearchClient;
+import org.opensearch.client.transport.rest_client.RestClientTransport;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.util.StringUtils;
+
+@Configuration
+@EnableConfigurationProperties(OpenSearchProperties.class)
+public class OpenSearchConfig {
+
+  @Bean(destroyMethod = "close")
+  @ConditionalOnProperty(prefix = "app.search", name = "enabled", havingValue = "true")
+  public RestClient openSearchRestClient(OpenSearchProperties properties) {
+    RestClientBuilder builder = RestClient.builder(
+      new HttpHost(properties.getScheme(), properties.getHost(), properties.getPort())
+    );
+    if (StringUtils.hasText(properties.getUsername())) {
+      BasicCredentialsProvider credentialsProvider = new BasicCredentialsProvider();
+      credentialsProvider.setCredentials(
+        new AuthScope(properties.getHost(), properties.getPort()),
+        new UsernamePasswordCredentials(
+          properties.getUsername(),
+          properties.getPassword() != null ? properties.getPassword().toCharArray() : new char[0]
+        )
+      );
+      builder.setHttpClientConfigCallback(httpClientBuilder ->
+        httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider)
+      );
+    }
+    return builder.build();
+  }
+
+  @Bean(destroyMethod = "close")
+  @ConditionalOnBean(RestClient.class)
+  public RestClientTransport openSearchTransport(RestClient restClient) {
+    return new RestClientTransport(restClient, new JacksonJsonpMapper());
+  }
+
+  @Bean
+  @ConditionalOnBean(RestClientTransport.class)
+  public OpenSearchClient openSearchClient(RestClientTransport transport) {
+    return new OpenSearchClient(transport);
+  }
+
+  @Bean
+  @ConditionalOnBean(OpenSearchClient.class)
+  public SearchIndexInitializer searchIndexInitializer(
+    OpenSearchClient client,
+    OpenSearchProperties properties
+  ) {
+    return new SearchIndexInitializer(client, properties);
+  }
+
+  @Bean
+  @ConditionalOnBean(OpenSearchClient.class)
+  public SearchIndexer openSearchIndexer(OpenSearchClient client, OpenSearchProperties properties) {
+    return new OpenSearchIndexer(client);
+  }
+
+  @Bean
+  @ConditionalOnMissingBean(SearchIndexer.class)
+  public SearchIndexer noopSearchIndexer() {
+    return new NoopSearchIndexer();
+  }
+}

backend/src/main/java/com/openisle/search/OpenSearchIndexer.java

@@ -0,0 +1,49 @@
+package com.openisle.search;
+
+import java.io.IOException;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.opensearch.client.opensearch.OpenSearchClient;
+import org.opensearch.client.opensearch.core.DeleteRequest;
+import org.opensearch.client.opensearch.core.IndexRequest;
+import org.opensearch.client.opensearch.core.IndexResponse;
+
+@Slf4j
+@RequiredArgsConstructor
+public class OpenSearchIndexer implements SearchIndexer {
+
+  private final OpenSearchClient client;
+
+  @Override
+  public void indexDocument(String index, SearchDocument document) {
+    if (document == null || document.entityId() == null) {
+      return;
+    }
+    try {
+      IndexRequest<SearchDocument> request = IndexRequest.of(builder ->
+        builder.index(index).id(document.entityId().toString()).document(document)
+      );
+      IndexResponse response = client.index(request);
+      log.info(
+        "Indexed document {} into {} with result {}",
+        document.entityId(),
+        index,
+        response.result()
+      );
+    } catch (IOException e) {
+      log.warn("Failed to index document {} into {}", document.entityId(), index, e);
+    }
+  }
+
+  @Override
+  public void deleteDocument(String index, Long id) {
+    if (id == null) {
+      return;
+    }
+    try {
+      client.delete(DeleteRequest.of(builder -> builder.index(index).id(id.toString())));
+    } catch (IOException e) {
+      log.warn("Failed to delete document {} from {}", id, index, e);
+    }
+  }
+}

backend/src/main/java/com/openisle/search/OpenSearchProperties.java

@@ -0,0 +1,63 @@
+package com.openisle.search;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+@Getter
+@Setter
+@ConfigurationProperties(prefix = "app.search")
+public class OpenSearchProperties {
+
+  private boolean enabled = false;
+  private String host = "localhost";
+  private int port = 9200;
+  private String scheme = "http";
+  private String username;
+  private String password;
+  private String indexPrefix = "openisle";
+  private boolean initialize = true;
+  private int highlightFragmentSize = 200;
+  private boolean reindexOnStartup = false;
+  private int reindexBatchSize = 500;
+
+  private Indices indices = new Indices();
+
+  public String postsIndex() {
+    return indexName(indices.posts);
+  }
+
+  public String commentsIndex() {
+    return indexName(indices.comments);
+  }
+
+  public String usersIndex() {
+    return indexName(indices.users);
+  }
+
+  public String categoriesIndex() {
+    return indexName(indices.categories);
+  }
+
+  public String tagsIndex() {
+    return indexName(indices.tags);
+  }
+
+  private String indexName(String suffix) {
+    if (indexPrefix == null || indexPrefix.isBlank()) {
+      return suffix;
+    }
+    return indexPrefix + "-" + suffix;
+  }
+
+  @Getter
+  @Setter
+  public static class Indices {
+
+    private String posts = "posts";
+    private String comments = "comments";
+    private String users = "users";
+    private String categories = "categories";
+    private String tags = "tags";
+  }
+}

backend/src/main/java/com/openisle/search/SearchDocument.java

@@ -0,0 +1,15 @@
+package com.openisle.search;
+
+import java.util.List;
+
+public record SearchDocument(
+  String type,
+  Long entityId,
+  String title,
+  String content,
+  String author,
+  String category,
+  List<String> tags,
+  Long postId,
+  Long createdAt
+) {}

backend/src/main/java/com/openisle/search/SearchDocumentFactory.java

@@ -0,0 +1,127 @@
+package com.openisle.search;
+
+import com.openisle.model.Category;
+import com.openisle.model.Comment;
+import com.openisle.model.Post;
+import com.openisle.model.Tag;
+import com.openisle.model.User;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+public final class SearchDocumentFactory {
+
+  private SearchDocumentFactory() {}
+
+  public static SearchDocument fromPost(Post post) {
+    if (post == null || post.getId() == null) {
+      return null;
+    }
+    List<String> tags = post.getTags() == null
+      ? Collections.emptyList()
+      : post
+        .getTags()
+        .stream()
+        .map(Tag::getName)
+        .filter(Objects::nonNull)
+        .collect(Collectors.toList());
+    return new SearchDocument(
+      "post",
+      post.getId(),
+      post.getTitle(),
+      post.getContent(),
+      post.getAuthor() != null ? post.getAuthor().getUsername() : null,
+      post.getCategory() != null ? post.getCategory().getName() : null,
+      tags,
+      post.getId(),
+      toEpochMillis(post.getCreatedAt())
+    );
+  }
+
+  public static SearchDocument fromComment(Comment comment) {
+    if (comment == null || comment.getId() == null) {
+      return null;
+    }
+    Post post = comment.getPost();
+    List<String> tags = post == null || post.getTags() == null
+      ? Collections.emptyList()
+      : post
+        .getTags()
+        .stream()
+        .map(Tag::getName)
+        .filter(Objects::nonNull)
+        .collect(Collectors.toList());
+    return new SearchDocument(
+      "comment",
+      comment.getId(),
+      post != null ? post.getTitle() : null,
+      comment.getContent(),
+      comment.getAuthor() != null ? comment.getAuthor().getUsername() : null,
+      post != null && post.getCategory() != null ? post.getCategory().getName() : null,
+      tags,
+      post != null ? post.getId() : null,
+      toEpochMillis(comment.getCreatedAt())
+    );
+  }
+
+  public static SearchDocument fromUser(User user) {
+    if (user == null || user.getId() == null) {
+      return null;
+    }
+    return new SearchDocument(
+      "user",
+      user.getId(),
+      user.getUsername(),
+      user.getIntroduction(),
+      null,
+      null,
+      Collections.emptyList(),
+      null,
+      toEpochMillis(user.getCreatedAt())
+    );
+  }
+
+  public static SearchDocument fromCategory(Category category) {
+    if (category == null || category.getId() == null) {
+      return null;
+    }
+    return new SearchDocument(
+      "category",
+      category.getId(),
+      category.getName(),
+      category.getDescription(),
+      null,
+      null,
+      Collections.emptyList(),
+      null,
+      null
+    );
+  }
+
+  public static SearchDocument fromTag(Tag tag) {
+    if (tag == null || tag.getId() == null) {
+      return null;
+    }
+    return new SearchDocument(
+      "tag",
+      tag.getId(),
+      tag.getName(),
+      tag.getDescription(),
+      null,
+      null,
+      Collections.emptyList(),
+      null,
+      toEpochMillis(tag.getCreatedAt())
+    );
+  }
+
+  private static Long toEpochMillis(LocalDateTime time) {
+    if (time == null) {
+      return null;
+    }
+    return time.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
+  }
+}

backend/src/main/java/com/openisle/search/SearchIndexEventListener.java

@@ -0,0 +1,33 @@
+package com.openisle.search;
+
+import com.openisle.search.event.DeleteDocumentEvent;
+import com.openisle.search.event.IndexDocumentEvent;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.event.TransactionPhase;
+import org.springframework.transaction.event.TransactionalEventListener;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class SearchIndexEventListener {
+
+  private final SearchIndexer searchIndexer;
+
+  @TransactionalEventListener(phase = TransactionPhase.AFTER_COMMIT, fallbackExecution = true)
+  public void handleIndex(IndexDocumentEvent event) {
+    if (event == null || event.document() == null) {
+      return;
+    }
+    searchIndexer.indexDocument(event.index(), event.document());
+  }
+
+  @TransactionalEventListener(phase = TransactionPhase.AFTER_COMMIT, fallbackExecution = true)
+  public void handleDelete(DeleteDocumentEvent event) {
+    if (event == null) {
+      return;
+    }
+    searchIndexer.deleteDocument(event.index(), event.id());
+  }
+}

backend/src/main/java/com/openisle/search/SearchIndexEventPublisher.java

@@ -0,0 +1,99 @@
+package com.openisle.search;
+
+import com.openisle.model.Category;
+import com.openisle.model.Comment;
+import com.openisle.model.Post;
+import com.openisle.model.PostStatus;
+import com.openisle.model.Tag;
+import com.openisle.model.User;
+import com.openisle.search.event.DeleteDocumentEvent;
+import com.openisle.search.event.IndexDocumentEvent;
+import lombok.RequiredArgsConstructor;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class SearchIndexEventPublisher {
+
+  private final ApplicationEventPublisher publisher;
+  private final OpenSearchProperties properties;
+
+  public void publishPostSaved(Post post) {
+    if (!properties.isEnabled() || post == null || post.getStatus() != PostStatus.PUBLISHED) {
+      return;
+    }
+    SearchDocument document = SearchDocumentFactory.fromPost(post);
+    if (document != null) {
+      publisher.publishEvent(new IndexDocumentEvent(properties.postsIndex(), document));
+    }
+  }
+
+  public void publishPostDeleted(Long postId) {
+    if (!properties.isEnabled() || postId == null) {
+      return;
+    }
+    publisher.publishEvent(new DeleteDocumentEvent(properties.postsIndex(), postId));
+  }
+
+  public void publishCommentSaved(Comment comment) {
+    if (!properties.isEnabled() || comment == null) {
+      return;
+    }
+    SearchDocument document = SearchDocumentFactory.fromComment(comment);
+    if (document != null) {
+      publisher.publishEvent(new IndexDocumentEvent(properties.commentsIndex(), document));
+    }
+  }
+
+  public void publishCommentDeleted(Long commentId) {
+    if (!properties.isEnabled() || commentId == null) {
+      return;
+    }
+    publisher.publishEvent(new DeleteDocumentEvent(properties.commentsIndex(), commentId));
+  }
+
+  public void publishUserSaved(User user) {
+    if (!properties.isEnabled() || user == null) {
+      return;
+    }
+    SearchDocument document = SearchDocumentFactory.fromUser(user);
+    if (document != null) {
+      publisher.publishEvent(new IndexDocumentEvent(properties.usersIndex(), document));
+    }
+  }
+
+  public void publishCategorySaved(Category category) {
+    if (!properties.isEnabled() || category == null) {
+      return;
+    }
+    SearchDocument document = SearchDocumentFactory.fromCategory(category);
+    if (document != null) {
+      publisher.publishEvent(new IndexDocumentEvent(properties.categoriesIndex(), document));
+    }
+  }
+
+  public void publishCategoryDeleted(Long categoryId) {
+    if (!properties.isEnabled() || categoryId == null) {
+      return;
+    }
+    publisher.publishEvent(new DeleteDocumentEvent(properties.categoriesIndex(), categoryId));
+  }
+
+  public void publishTagSaved(Tag tag) {
+    if (!properties.isEnabled() || tag == null || !tag.isApproved()) {
+      return;
+    }
+    SearchDocument document = SearchDocumentFactory.fromTag(tag);
+    if (document != null) {
+      publisher.publishEvent(new IndexDocumentEvent(properties.tagsIndex(), document));
+    }
+  }
+
+  public void publishTagDeleted(Long tagId) {
+    if (!properties.isEnabled() || tagId == null) {
+      return;
+    }
+    publisher.publishEvent(new DeleteDocumentEvent(properties.tagsIndex(), tagId));
+  }
+}

backend/src/main/java/com/openisle/search/SearchIndexInitializer.java

@@ -0,0 +1,219 @@
+package com.openisle.search;
+
+import jakarta.annotation.PostConstruct;
+import java.io.IOException;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.opensearch.client.json.JsonData;
+import org.opensearch.client.opensearch.OpenSearchClient;
+import org.opensearch.client.opensearch._types.mapping.Property;
+import org.opensearch.client.opensearch._types.mapping.TypeMapping;
+import org.opensearch.client.opensearch.indices.IndexSettings;
+
+@Slf4j
+@RequiredArgsConstructor
+public class SearchIndexInitializer {
+
+  private final OpenSearchClient client;
+  private final OpenSearchProperties properties;
+
+  @PostConstruct
+  public void initialize() {
+    if (!properties.isEnabled() || !properties.isInitialize()) {
+      return;
+    }
+    ensureIndex(properties.postsIndex(), this::postMapping);
+    ensureIndex(properties.commentsIndex(), this::commentMapping);
+    ensureIndex(properties.usersIndex(), this::userMapping);
+    ensureIndex(properties.categoriesIndex(), this::categoryMapping);
+    ensureIndex(properties.tagsIndex(), this::tagMapping);
+  }
+
+  private void ensureIndex(String index, java.util.function.Supplier<TypeMapping> mappingSupplier) {
+    try {
+      boolean exists = client
+        .indices()
+        .exists(builder -> builder.index(index))
+        .value();
+      if (exists) {
+        return;
+      }
+      client
+        .indices()
+        .create(builder ->
+          builder.index(index).settings(this::applyPinyinAnalysis).mappings(mappingSupplier.get())
+        );
+      log.info("Created OpenSearch index {}", index);
+    } catch (IOException e) {
+      log.warn("Failed to initialize OpenSearch index {}", index, e);
+    }
+  }
+
+  private TypeMapping postMapping() {
+    return TypeMapping.of(builder ->
+      builder
+        .properties("type", Property.of(p -> p.keyword(k -> k)))
+        .properties("title", textWithRawAndPinyin())
+        .properties("content", textWithPinyinOnly()) // content 不做 .raw，避免超长 keyword
+        .properties("author", keywordWithRawAndPinyin())
+        .properties("category", keywordWithRawAndPinyin())
+        .properties("tags", keywordWithRawAndPinyin())
+        .properties("postId", Property.of(p -> p.long_(l -> l)))
+        .properties(
+          "createdAt",
+          Property.of(p -> p.date(d -> d.format("strict_date_optional_time||epoch_millis")))
+        )
+    );
+  }
+
+  private TypeMapping commentMapping() {
+    return TypeMapping.of(builder ->
+      builder
+        .properties("type", Property.of(p -> p.keyword(k -> k)))
+        .properties("title", textWithRawAndPinyin())
+        .properties("content", textWithPinyinOnly())
+        .properties("author", keywordWithRawAndPinyin())
+        .properties("category", keywordWithRawAndPinyin())
+        .properties("tags", keywordWithRawAndPinyin())
+        .properties("postId", Property.of(p -> p.long_(l -> l)))
+        .properties(
+          "createdAt",
+          Property.of(p -> p.date(d -> d.format("strict_date_optional_time||epoch_millis")))
+        )
+    );
+  }
+
+  private TypeMapping userMapping() {
+    return TypeMapping.of(builder ->
+      builder
+        .properties("type", Property.of(p -> p.keyword(k -> k)))
+        .properties("title", textWithRawAndPinyin())
+        .properties("content", textWithPinyinOnly())
+        .properties(
+          "createdAt",
+          Property.of(p -> p.date(d -> d.format("strict_date_optional_time||epoch_millis")))
+        )
+    );
+  }
+
+  private TypeMapping categoryMapping() {
+    return TypeMapping.of(builder ->
+      builder
+        .properties("type", Property.of(p -> p.keyword(k -> k)))
+        .properties("title", textWithRawAndPinyin())
+        .properties("content", textWithPinyinOnly())
+    );
+  }
+
+  private TypeMapping tagMapping() {
+    return TypeMapping.of(builder ->
+      builder
+        .properties("type", Property.of(p -> p.keyword(k -> k)))
+        .properties("title", textWithRawAndPinyin())
+        .properties("content", textWithPinyinOnly())
+        .properties(
+          "createdAt",
+          Property.of(p -> p.date(d -> d.format("strict_date_optional_time||epoch_millis")))
+        )
+    );
+  }
+
+  /** 文本字段：.raw（keyword 精确） + .py（拼音短语精确） + .zh（ICU+2~3gram 召回） */
+  private Property textWithRawAndPinyin() {
+    return Property.of(p ->
+      p.text(t ->
+        t
+          .fields("raw", f -> f.keyword(k -> k.normalizer("lowercase_normalizer")))
+          .fields("py", f -> f.text(sub -> sub.analyzer("py_index").searchAnalyzer("py_search")))
+          .fields("zh", f ->
+            f.text(sub -> sub.analyzer("zh_ngram_index").searchAnalyzer("zh_search"))
+          )
+      )
+    );
+  }
+
+  /** 长文本 content：保留拼音 + 新增 zh 子字段（不加 .raw，避免过长 keyword） */
+  private Property textWithPinyinOnly() {
+    return Property.of(p ->
+      p.text(t ->
+        t
+          .fields("py", f -> f.text(sub -> sub.analyzer("py_index").searchAnalyzer("py_search")))
+          .fields("zh", f ->
+            f.text(sub -> sub.analyzer("zh_ngram_index").searchAnalyzer("zh_search"))
+          )
+      )
+    );
+  }
+
+  /** 关键词字段（author/category/tags）：keyword 等值 + .py + .zh（尽量对齐标题策略） */
+  private Property keywordWithRawAndPinyin() {
+    return Property.of(p ->
+      p.keyword(k ->
+        k
+          .normalizer("lowercase_normalizer")
+          .fields("raw", f -> f.keyword(kk -> kk.normalizer("lowercase_normalizer")))
+          .fields("py", f -> f.text(sub -> sub.analyzer("py_index").searchAnalyzer("py_search")))
+          .fields("zh", f ->
+            f.text(sub -> sub.analyzer("zh_ngram_index").searchAnalyzer("zh_search"))
+          )
+      )
+    );
+  }
+
+  /** 新增 zh 分析器（ICU + 2~3gram），并保留你已有的 pinyin/normalizer 设置 */
+  private IndexSettings.Builder applyPinyinAnalysis(IndexSettings.Builder builder) {
+    Map<String, JsonData> settings = new LinkedHashMap<>();
+
+    // --- 已有：keyword normalizer（用于 .raw）
+    settings.put("analysis.normalizer.lowercase_normalizer.type", JsonData.of("custom"));
+    settings.put(
+      "analysis.normalizer.lowercase_normalizer.filter",
+      JsonData.of(List.of("lowercase"))
+    );
+
+    // --- 已有：pinyin filter + analyzers
+    settings.put("analysis.filter.py_filter.type", JsonData.of("pinyin"));
+    settings.put("analysis.filter.py_filter.keep_full_pinyin", JsonData.of(true));
+    settings.put("analysis.filter.py_filter.keep_joined_full_pinyin", JsonData.of(true));
+    settings.put("analysis.filter.py_filter.keep_first_letter", JsonData.of(false));
+    settings.put("analysis.filter.py_filter.remove_duplicated_term", JsonData.of(true));
+
+    settings.put("analysis.analyzer.py_index.type", JsonData.of("custom"));
+    settings.put("analysis.analyzer.py_index.tokenizer", JsonData.of("standard"));
+    settings.put(
+      "analysis.analyzer.py_index.filter",
+      JsonData.of(List.of("lowercase", "py_filter"))
+    );
+
+    settings.put("analysis.analyzer.py_search.type", JsonData.of("custom"));
+    settings.put("analysis.analyzer.py_search.tokenizer", JsonData.of("standard"));
+    settings.put(
+      "analysis.analyzer.py_search.filter",
+      JsonData.of(List.of("lowercase", "py_filter"))
+    );
+
+    settings.put("analysis.filter.zh_ngram_2_3.type", JsonData.of("ngram"));
+    settings.put("analysis.filter.zh_ngram_2_3.min_gram", JsonData.of(2));
+    settings.put("analysis.filter.zh_ngram_2_3.max_gram", JsonData.of(3));
+
+    settings.put("analysis.analyzer.zh_ngram_index.type", JsonData.of("custom"));
+    settings.put("analysis.analyzer.zh_ngram_index.tokenizer", JsonData.of("icu_tokenizer"));
+    settings.put(
+      "analysis.analyzer.zh_ngram_index.filter",
+      JsonData.of(List.of("lowercase", "zh_ngram_2_3"))
+    );
+
+    settings.put("analysis.analyzer.zh_search.type", JsonData.of("custom"));
+    settings.put("analysis.analyzer.zh_search.tokenizer", JsonData.of("icu_tokenizer"));
+    settings.put(
+      "analysis.analyzer.zh_search.filter",
+      JsonData.of(List.of("lowercase", "zh_ngram_2_3"))
+    );
+
+    settings.forEach(builder::customSettings);
+    return builder;
+  }
+}

backend/src/main/java/com/openisle/search/SearchIndexer.java

@@ -0,0 +1,6 @@
+package com.openisle.search;
+
+public interface SearchIndexer {
+  void indexDocument(String index, SearchDocument document);
+  void deleteDocument(String index, Long id);
+}

backend/src/main/java/com/openisle/search/SearchReindexInitializer.java

@@ -0,0 +1,30 @@
+package com.openisle.search;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class SearchReindexInitializer implements CommandLineRunner {
+
+  private final OpenSearchProperties properties;
+  private final SearchReindexService searchReindexService;
+
+  @Override
+  public void run(String... args) {
+    if (!properties.isEnabled()) {
+      log.info("Search indexing disabled, skipping startup reindex.");
+      return;
+    }
+
+    if (!properties.isReindexOnStartup()) {
+      log.debug("Startup reindex disabled by configuration.");
+      return;
+    }
+
+    searchReindexService.reindexAll();
+  }
+}

backend/src/main/java/com/openisle/search/SearchReindexService.java

@@ -0,0 +1,94 @@
+package com.openisle.search;
+
+import com.openisle.model.Post;
+import com.openisle.model.PostStatus;
+import com.openisle.model.Tag;
+import com.openisle.repository.CategoryRepository;
+import com.openisle.repository.CommentRepository;
+import com.openisle.repository.PostRepository;
+import com.openisle.repository.TagRepository;
+import com.openisle.repository.UserRepository;
+import java.util.Objects;
+import java.util.function.Function;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class SearchReindexService {
+
+  private final SearchIndexer searchIndexer;
+  private final OpenSearchProperties properties;
+  private final PostRepository postRepository;
+  private final CommentRepository commentRepository;
+  private final UserRepository userRepository;
+  private final CategoryRepository categoryRepository;
+  private final TagRepository tagRepository;
+
+  @Transactional(readOnly = true)
+  public void reindexAll() {
+    if (!properties.isEnabled()) {
+      log.info("Search indexing is disabled, skipping reindex operation.");
+      return;
+    }
+
+    log.info("Starting full search reindex operation.");
+
+    reindex(properties.postsIndex(), postRepository::findAll, (Post post) ->
+      post.getStatus() == PostStatus.PUBLISHED ? SearchDocumentFactory.fromPost(post) : null
+    );
+
+    reindex(
+      properties.commentsIndex(),
+      commentRepository::findAll,
+      SearchDocumentFactory::fromComment
+    );
+
+    reindex(properties.usersIndex(), userRepository::findAll, SearchDocumentFactory::fromUser);
+
+    reindex(
+      properties.categoriesIndex(),
+      categoryRepository::findAll,
+      SearchDocumentFactory::fromCategory
+    );
+
+    reindex(properties.tagsIndex(), tagRepository::findAll, (Tag tag) ->
+      tag.isApproved() ? SearchDocumentFactory.fromTag(tag) : null
+    );
+
+    log.info("Completed full search reindex operation.");
+  }
+
+  private <T> void reindex(
+    String index,
+    Function<Pageable, Page<T>> pageSupplier,
+    Function<T, SearchDocument> mapper
+  ) {
+    int batchSize = Math.max(1, properties.getReindexBatchSize());
+    int pageNumber = 0;
+
+    Page<T> page;
+    do {
+      Pageable pageable = PageRequest.of(pageNumber, batchSize);
+      page = pageSupplier.apply(pageable);
+      if (page.isEmpty() && pageNumber == 0) {
+        log.info("No entities found for index {}.", index);
+      }
+
+      log.info("Reindexing {} entities for index {}.", page.getTotalElements(), index);
+      for (T entity : page) {
+        SearchDocument document = mapper.apply(entity);
+        if (Objects.nonNull(document)) {
+          searchIndexer.indexDocument(index, document);
+        }
+      }
+      pageNumber++;
+    } while (page.hasNext());
+  }
+}

backend/src/main/java/com/openisle/search/event/DeleteDocumentEvent.java

@@ -0,0 +1,3 @@
+package com.openisle.search.event;
+
+public record DeleteDocumentEvent(String index, Long id) {}

backend/src/main/java/com/openisle/search/event/IndexDocumentEvent.java

@@ -0,0 +1,5 @@
+package com.openisle.search.event;
+
+import com.openisle.search.SearchDocument;
+
+public record IndexDocumentEvent(String index, SearchDocument document) {}

backend/src/main/java/com/openisle/service/CategoryService.java

@@ -3,6 +3,7 @@ package com.openisle.service;
 import com.openisle.config.CachingConfig;
 import com.openisle.model.Category;
 import com.openisle.repository.CategoryRepository;
+import com.openisle.search.SearchIndexEventPublisher;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.cache.annotation.CacheEvict;
@@ -14,6 +15,7 @@ import org.springframework.stereotype.Service;
 public class CategoryService {
 
   private final CategoryRepository categoryRepository;
+  private final SearchIndexEventPublisher searchIndexEventPublisher;
 
   @CacheEvict(value = CachingConfig.CATEGORY_CACHE_NAME, allEntries = true)
   public Category createCategory(String name, String description, String icon, String smallIcon) {
@@ -22,7 +24,9 @@ public class CategoryService {
     category.setDescription(description);
     category.setIcon(icon);
     category.setSmallIcon(smallIcon);
-    return categoryRepository.save(category);
+    Category saved = categoryRepository.save(category);
+    searchIndexEventPublisher.publishCategorySaved(saved);
+    return saved;
   }
 
   @CacheEvict(value = CachingConfig.CATEGORY_CACHE_NAME, allEntries = true)
@@ -48,12 +52,15 @@ public class CategoryService {
     if (smallIcon != null) {
       category.setSmallIcon(smallIcon);
     }
-    return categoryRepository.save(category);
+    Category saved = categoryRepository.save(category);
+    searchIndexEventPublisher.publishCategorySaved(saved);
+    return saved;
   }
 
   @CacheEvict(value = CachingConfig.CATEGORY_CACHE_NAME, allEntries = true)
   public void deleteCategory(Long id) {
     categoryRepository.deleteById(id);
+    searchIndexEventPublisher.publishCategoryDeleted(id);
   }
 
   public Category getCategory(Long id) {

backend/src/main/java/com/openisle/service/CommentService.java

@@ -16,6 +16,7 @@ import com.openisle.repository.PointHistoryRepository;
 import com.openisle.repository.PostRepository;
 import com.openisle.repository.ReactionRepository;
 import com.openisle.repository.UserRepository;
+import com.openisle.search.SearchIndexEventPublisher;
 import com.openisle.service.NotificationService;
 import com.openisle.service.PointService;
 import com.openisle.service.SubscriptionService;
@@ -49,6 +50,7 @@ public class CommentService {
   private final PointHistoryRepository pointHistoryRepository;
   private final PointService pointService;
   private final ImageUploader imageUploader;
+  private final SearchIndexEventPublisher searchIndexEventPublisher;
 
   @CacheEvict(value = CachingConfig.POST_CACHE_NAME, allEntries = true)
   @Transactional
@@ -124,6 +126,7 @@ public class CommentService {
     }
     notificationService.notifyMentions(content, author, post, comment);
     log.debug("addComment finished for comment {}", comment.getId());
+    searchIndexEventPublisher.publishCommentSaved(comment);
     return comment;
   }
 
@@ -221,6 +224,7 @@ public class CommentService {
     }
     notificationService.notifyMentions(content, author, parent.getPost(), comment);
     log.debug("addReply finished for comment {}", comment.getId());
+    searchIndexEventPublisher.publishCommentSaved(comment);
     return comment;
   }
 
@@ -360,7 +364,9 @@ public class CommentService {
 
     // 逻辑删除评论
     Post post = comment.getPost();
+    Long commentId = comment.getId();
     commentRepository.delete(comment);
+    searchIndexEventPublisher.publishCommentDeleted(commentId);
     // 删除积分历史
     pointHistoryRepository.deleteAll(pointHistories);
 

backend/src/main/java/com/openisle/service/PostService.java

@@ -16,6 +16,7 @@ import com.openisle.repository.PostSubscriptionRepository;
 import com.openisle.repository.ReactionRepository;
 import com.openisle.repository.TagRepository;
 import com.openisle.repository.UserRepository;
+import com.openisle.search.SearchIndexEventPublisher;
 import com.openisle.service.EmailSender;
 import java.time.Duration;
 import java.time.LocalDateTime;
@@ -73,6 +74,8 @@ public class PostService {
   private final ConcurrentMap<Long, ScheduledFuture<?>> scheduledFinalizations =
     new ConcurrentHashMap<>();
 
+  private final SearchIndexEventPublisher searchIndexEventPublisher;
+
   @Value("${app.website-url:https://www.open-isle.com}")
   private String websiteUrl;
 
@@ -103,7 +106,8 @@ public class PostService {
     PostChangeLogService postChangeLogService,
     PointHistoryRepository pointHistoryRepository,
     @Value("${app.post.publish-mode:DIRECT}") PublishMode publishMode,
-    RedisTemplate redisTemplate
+    RedisTemplate redisTemplate,
+    SearchIndexEventPublisher searchIndexEventPublisher
   ) {
     this.postRepository = postRepository;
     this.userRepository = userRepository;
@@ -130,6 +134,7 @@ public class PostService {
     this.publishMode = publishMode;
 
     this.redisTemplate = redisTemplate;
+    this.searchIndexEventPublisher = searchIndexEventPublisher;
   }
 
   @EventListener(ApplicationReadyEvent.class)
@@ -346,6 +351,9 @@ public class PostService {
       );
       scheduledFinalizations.put(pp.getId(), future);
     }
+    if (post.getStatus() == PostStatus.PUBLISHED) {
+      searchIndexEventPublisher.publishPostSaved(post);
+    }
     return post;
   }
 
@@ -868,10 +876,12 @@ public class PostService {
       if (!tag.isApproved()) {
         tag.setApproved(true);
         tagRepository.save(tag);
+        searchIndexEventPublisher.publishTagSaved(tag);
       }
     }
     post.setStatus(PostStatus.PUBLISHED);
     post = postRepository.save(post);
+    searchIndexEventPublisher.publishPostSaved(post);
     notificationService.createNotification(
       post.getAuthor(),
       NotificationType.POST_REVIEWED,
@@ -895,13 +905,16 @@ public class PostService {
       if (!tag.isApproved()) {
         long count = postRepository.countDistinctByTags_Id(tag.getId());
         if (count <= 1) {
+          Long tagId = tag.getId();
           post.getTags().remove(tag);
           tagRepository.delete(tag);
+          searchIndexEventPublisher.publishTagDeleted(tagId);
         }
       }
     }
     post.setStatus(PostStatus.REJECTED);
     post = postRepository.save(post);
+    searchIndexEventPublisher.publishPostDeleted(post.getId());
     notificationService.createNotification(
       post.getAuthor(),
       NotificationType.POST_REVIEWED,
@@ -1042,6 +1055,9 @@ public class PostService {
     if (!oldTags.equals(newTags)) {
       postChangeLogService.recordTagChange(updated, user, oldTags, newTags);
     }
+    if (updated.getStatus() == PostStatus.PUBLISHED) {
+      searchIndexEventPublisher.publishPostSaved(updated);
+    }
     return updated;
   }
 
@@ -1094,8 +1110,10 @@ public class PostService {
       }
     }
     String title = post.getTitle();
+    Long postId = post.getId();
     postChangeLogService.deleteLogsForPost(post);
     postRepository.delete(post);
+    searchIndexEventPublisher.publishPostDeleted(postId);
     if (adminDeleting) {
       notificationService.createNotification(
         author,

backend/src/main/java/com/openisle/service/SearchService.java

@@ -11,14 +11,30 @@ import com.openisle.repository.CommentRepository;
 import com.openisle.repository.PostRepository;
 import com.openisle.repository.TagRepository;
 import com.openisle.repository.UserRepository;
+import com.openisle.search.OpenSearchProperties;
+import com.openisle.search.SearchDocument;
+import java.io.IOException;
+import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.opensearch.client.opensearch.OpenSearchClient;
+import org.opensearch.client.opensearch._types.FieldValue;
+import org.opensearch.client.opensearch._types.query_dsl.TextQueryType;
+import org.opensearch.client.opensearch.core.SearchResponse;
+import org.opensearch.client.opensearch.core.search.Hit;
 import org.springframework.stereotype.Service;
+import org.springframework.web.util.HtmlUtils;
 
 @Service
+@Slf4j
 @RequiredArgsConstructor
 public class SearchService {
 
@@ -27,10 +43,14 @@ public class SearchService {
   private final CommentRepository commentRepository;
   private final CategoryRepository categoryRepository;
   private final TagRepository tagRepository;
+  private final Optional<OpenSearchClient> openSearchClient;
+  private final OpenSearchProperties openSearchProperties;
 
   @org.springframework.beans.factory.annotation.Value("${app.snippet-length}")
   private int snippetLength;
 
+  private static final int DEFAULT_OPEN_SEARCH_LIMIT = 50;
+
   public List<User> searchUsers(String keyword) {
     return userRepository.findByUsernameContainingIgnoreCase(keyword);
   }
@@ -64,49 +84,113 @@ public class SearchService {
   }
 
   public List<SearchResult> globalSearch(String keyword) {
+    if (keyword == null || keyword.isBlank()) {
+      return List.of();
+    }
+    if (isOpenSearchEnabled()) {
+      try {
+        List<SearchResult> results = searchWithOpenSearch(keyword);
+        if (!results.isEmpty()) {
+          return results;
+        }
+      } catch (IOException e) {
+        log.warn("OpenSearch global search failed, falling back to database query", e);
+      }
+    }
+    return fallbackGlobalSearch(keyword);
+  }
+
+  private List<SearchResult> fallbackGlobalSearch(String keyword) {
+    final String effectiveKeyword = keyword == null ? "" : keyword.trim();
     Stream<SearchResult> users = searchUsers(keyword)
       .stream()
       .map(u ->
-        new SearchResult("user", u.getId(), u.getUsername(), u.getIntroduction(), null, null)
+        new SearchResult(
+          "user",
+          u.getId(),
+          u.getUsername(),
+          u.getIntroduction(),
+          null,
+          null,
+          highlightHtml(u.getUsername(), effectiveKeyword),
+          highlightHtml(u.getIntroduction(), effectiveKeyword),
+          null
+        )
       );
 
     Stream<SearchResult> categories = searchCategories(keyword)
       .stream()
       .map(c ->
-        new SearchResult("category", c.getId(), c.getName(), null, c.getDescription(), null)
+        new SearchResult(
+          "category",
+          c.getId(),
+          c.getName(),
+          null,
+          c.getDescription(),
+          null,
+          highlightHtml(c.getName(), effectiveKeyword),
+          null,
+          highlightHtml(c.getDescription(), effectiveKeyword)
+        )
       );
 
     Stream<SearchResult> tags = searchTags(keyword)
       .stream()
-      .map(t -> new SearchResult("tag", t.getId(), t.getName(), null, t.getDescription(), null));
+      .map(t ->
+        new SearchResult(
+          "tag",
+          t.getId(),
+          t.getName(),
+          null,
+          t.getDescription(),
+          null,
+          highlightHtml(t.getName(), effectiveKeyword),
+          null,
+          highlightHtml(t.getDescription(), effectiveKeyword)
+        )
+      );
 
     // Merge post results while removing duplicates between search by content
     // and search by title
     List<SearchResult> mergedPosts = Stream.concat(
       searchPosts(keyword)
         .stream()
-        .map(p ->
-          new SearchResult(
+        .map(p -> {
+          String snippet = extractSnippet(p.getContent(), keyword, false);
+          return new SearchResult(
             "post",
             p.getId(),
             p.getTitle(),
             p.getCategory() != null ? p.getCategory().getName() : null,
-            extractSnippet(p.getContent(), keyword, false),
-            null
-          )
-        ),
+            snippet,
+            null,
+            highlightHtml(p.getTitle(), effectiveKeyword),
+            highlightHtml(
+              p.getCategory() != null ? p.getCategory().getName() : null,
+              effectiveKeyword
+            ),
+            highlightHtml(snippet, effectiveKeyword)
+          );
+        }),
       searchPostsByTitle(keyword)
         .stream()
-        .map(p ->
-          new SearchResult(
+        .map(p -> {
+          String snippet = extractSnippet(p.getContent(), keyword, true);
+          return new SearchResult(
             "post_title",
             p.getId(),
             p.getTitle(),
             p.getCategory() != null ? p.getCategory().getName() : null,
-            extractSnippet(p.getContent(), keyword, true),
-            null
-          )
-        )
+            snippet,
+            null,
+            highlightHtml(p.getTitle(), effectiveKeyword),
+            highlightHtml(
+              p.getCategory() != null ? p.getCategory().getName() : null,
+              effectiveKeyword
+            ),
+            highlightHtml(snippet, effectiveKeyword)
+          );
+        })
     )
       .collect(
         java.util.stream.Collectors.toMap(
@@ -122,22 +206,366 @@ public class SearchService {
 
     Stream<SearchResult> comments = searchComments(keyword)
       .stream()
-      .map(c ->
-        new SearchResult(
+      .map(c -> {
+        String snippet = extractSnippet(c.getContent(), keyword, false);
+        return new SearchResult(
           "comment",
           c.getId(),
           c.getPost().getTitle(),
           c.getAuthor().getUsername(),
-          extractSnippet(c.getContent(), keyword, false),
-          c.getPost().getId()
-        )
-      );
+          snippet,
+          c.getPost().getId(),
+          highlightHtml(c.getPost().getTitle(), effectiveKeyword),
+          highlightHtml(c.getAuthor().getUsername(), effectiveKeyword),
+          highlightHtml(snippet, effectiveKeyword)
+        );
+      });
 
     return Stream.of(users, categories, tags, mergedPosts.stream(), comments)
       .flatMap(s -> s)
       .toList();
   }
 
+  private boolean isOpenSearchEnabled() {
+    return openSearchProperties.isEnabled() && openSearchClient.isPresent();
+  }
+
+  // 在类里加上（字段或静态常量都可）
+  private static final java.util.regex.Pattern HANS_PATTERN = java.util.regex.Pattern.compile(
+    "\\p{IsHan}"
+  );
+
+  private static boolean containsHan(String s) {
+    return s != null && HANS_PATTERN.matcher(s).find();
+  }
+
+  private List<SearchResult> searchWithOpenSearch(String keyword) throws IOException {
+    var client = openSearchClient.orElse(null);
+    if (client == null) return List.of();
+
+    final String qRaw = keyword == null ? "" : keyword.trim();
+    if (qRaw.isEmpty()) return List.of();
+
+    final boolean hasHan = containsHan(qRaw);
+
+    SearchResponse<SearchDocument> resp = client.search(
+      b ->
+        b
+          .index(searchIndices())
+          .trackTotalHits(t -> t.enabled(true))
+          .query(qb ->
+            qb.bool(bool -> {
+              // ---------- 严格层 ----------
+              // 中文/任意短语（轻微符号/空白扰动）
+              bool.should(s ->
+                s.matchPhrase(mp -> mp.field("title").query(qRaw).slop(2).boost(6.0f))
+              );
+              bool.should(s ->
+                s.matchPhrase(mp -> mp.field("content").query(qRaw).slop(2).boost(2.5f))
+              );
+
+              // 结构化等值（.raw）
+              bool.should(s ->
+                s.term(t ->
+                  t
+                    .field("author.raw")
+                    .value(v -> v.stringValue(qRaw))
+                    .boost(4.0f)
+                )
+              );
+              bool.should(s ->
+                s.term(t ->
+                  t
+                    .field("category.raw")
+                    .value(v -> v.stringValue(qRaw))
+                    .boost(3.0f)
+                )
+              );
+              bool.should(s ->
+                s.term(t ->
+                  t
+                    .field("tags.raw")
+                    .value(v -> v.stringValue(qRaw))
+                    .boost(3.0f)
+                )
+              );
+
+              // 拼音短语（严格）
+              bool.should(s ->
+                s.matchPhrase(mp -> mp.field("title.py").query(qRaw).slop(1).boost(4.0f))
+              );
+              bool.should(s ->
+                s.matchPhrase(mp -> mp.field("content.py").query(qRaw).slop(1).boost(1.8f))
+              );
+              bool.should(s ->
+                s.matchPhrase(mp -> mp.field("author.py").query(qRaw).slop(1).boost(2.2f))
+              );
+              bool.should(s ->
+                s.matchPhrase(mp -> mp.field("category.py").query(qRaw).slop(1).boost(2.0f))
+              );
+              bool.should(s ->
+                s.matchPhrase(mp -> mp.field("tags.py").query(qRaw).slop(1).boost(2.0f))
+              );
+
+              // ---------- 放宽层（仅当包含中文时启用） ----------
+              if (hasHan) {
+                // title.zh
+                bool.should(s ->
+                  s.match(m ->
+                    m
+                      .field("title.zh")
+                      .query(org.opensearch.client.opensearch._types.FieldValue.of(qRaw))
+                      .operator(org.opensearch.client.opensearch._types.query_dsl.Operator.Or)
+                      .minimumShouldMatch("2<-1 3<-1 4<-1 5<-2 6<-2 7<-3")
+                      .boost(3.0f)
+                  )
+                );
+                // content.zh
+                bool.should(s ->
+                  s.match(m ->
+                    m
+                      .field("content.zh")
+                      .query(org.opensearch.client.opensearch._types.FieldValue.of(qRaw))
+                      .operator(org.opensearch.client.opensearch._types.query_dsl.Operator.Or)
+                      .minimumShouldMatch("2<-1 3<-1 4<-1 5<-2 6<-2 7<-3")
+                      .boost(1.6f)
+                  )
+                );
+              }
+
+              return bool.minimumShouldMatch("1");
+            })
+          )
+          // ---------- 高亮：允许跨子字段回填 + 匹配字段组 ----------
+          .highlight(h -> {
+            var hb = h
+              .preTags("<mark>")
+              .postTags("</mark>")
+              .requireFieldMatch(false)
+              .fields("title", f ->
+                f
+                  .fragmentSize(highlightFragmentSize())
+                  .numberOfFragments(1)
+                  .matchedFields(List.of("title", "title.zh", "title.py"))
+              )
+              .fields("content", f ->
+                f
+                  .fragmentSize(highlightFragmentSize())
+                  .numberOfFragments(1)
+                  .matchedFields(List.of("content", "content.zh", "content.py"))
+              )
+              .fields("title.zh", f -> f.fragmentSize(highlightFragmentSize()).numberOfFragments(1))
+              .fields("content.zh", f ->
+                f.fragmentSize(highlightFragmentSize()).numberOfFragments(1)
+              )
+              .fields("title.py", f -> f.fragmentSize(highlightFragmentSize()).numberOfFragments(1))
+              .fields("content.py", f ->
+                f.fragmentSize(highlightFragmentSize()).numberOfFragments(1)
+              )
+              .fields("author", f -> f.numberOfFragments(0))
+              .fields("author.py", f -> f.numberOfFragments(0))
+              .fields("category", f -> f.numberOfFragments(0))
+              .fields("category.py", f -> f.numberOfFragments(0))
+              .fields("tags", f -> f.numberOfFragments(0))
+              .fields("tags.py", f -> f.numberOfFragments(0));
+            return hb;
+          })
+          .size(DEFAULT_OPEN_SEARCH_LIMIT > 0 ? DEFAULT_OPEN_SEARCH_LIMIT : 10),
+      SearchDocument.class
+    );
+
+    return mapHits(resp.hits().hits(), qRaw);
+  }
+
+  /** Lucene query_string 安全转义（保留 * 由我们自己追加） */
+  private static String escapeForQueryString(String s) {
+    if (s == null || s.isEmpty()) return "";
+    StringBuilder sb = new StringBuilder(s.length() * 2);
+    for (char c : s.toCharArray()) {
+      switch (c) {
+        case '+':
+        case '-':
+        case '=':
+        case '&':
+        case '|':
+        case '>':
+        case '<':
+        case '!':
+        case '(':
+        case ')':
+        case '{':
+        case '}':
+        case '[':
+        case ']':
+        case '^':
+        case '"':
+        case '~': /* case '*': */ /* case '?': */
+        case ':':
+        case '\\':
+        case '/':
+          sb.append('\\').append(c);
+          break;
+        default:
+          sb.append(c);
+      }
+    }
+    return sb.toString();
+  }
+
+  private int highlightFragmentSize() {
+    int configured = openSearchProperties.getHighlightFragmentSize();
+    if (configured > 0) {
+      return configured;
+    }
+    if (snippetLength > 0) {
+      return snippetLength;
+    }
+    return 200;
+  }
+
+  private List<String> searchIndices() {
+    return List.of(
+      openSearchProperties.postsIndex(),
+      openSearchProperties.commentsIndex(),
+      openSearchProperties.usersIndex(),
+      openSearchProperties.categoriesIndex(),
+      openSearchProperties.tagsIndex()
+    );
+  }
+
+  private List<SearchResult> mapHits(List<Hit<SearchDocument>> hits, String keyword) {
+    List<SearchResult> results = new ArrayList<>();
+    for (Hit<SearchDocument> hit : hits) {
+      SearchResult result = mapHit(hit, keyword);
+      if (result != null) {
+        results.add(result);
+      }
+    }
+    return results;
+  }
+
+  private SearchResult mapHit(Hit<SearchDocument> hit, String keyword) {
+    SearchDocument document = hit.source();
+    if (document == null || document.entityId() == null) {
+      return null;
+    }
+    Map<String, List<String>> highlight = hit.highlight();
+    String highlightedContent = firstHighlight(
+      highlight,
+      "content",
+      "content.py",
+      "content.zh",
+      "content.raw"
+    );
+    String highlightedTitle = firstHighlight(
+      highlight,
+      "title",
+      "title.py",
+      "title.zh",
+      "title.raw"
+    );
+    String highlightedAuthor = firstHighlight(highlight, "author", "author.py");
+    String highlightedCategory = firstHighlight(highlight, "category", "category.py");
+    boolean highlightTitle = highlightedTitle != null && !highlightedTitle.isBlank();
+    String documentType = document.type() != null ? document.type() : "";
+    String effectiveType = documentType;
+    if ("post".equals(documentType) && highlightTitle) {
+      effectiveType = "post_title";
+    }
+    String snippetHtml = highlightedContent != null && !highlightedContent.isBlank()
+      ? highlightedContent
+      : null;
+    if (snippetHtml == null && highlightTitle) {
+      snippetHtml = highlightedTitle;
+    }
+
+    String snippet = snippetHtml != null && !snippetHtml.isBlank()
+      ? cleanHighlight(snippetHtml)
+      : null;
+    boolean fromStart = "post_title".equals(effectiveType);
+    if (snippet == null || snippet.isBlank()) {
+      snippet = fallbackSnippet(document.content(), keyword, fromStart);
+      if (snippetHtml == null) {
+        snippetHtml = highlightHtml(snippet, keyword);
+      }
+    } else if (snippetHtml == null) {
+      snippetHtml = highlightHtml(snippet, keyword);
+    }
+    if (snippet == null) {
+      snippet = "";
+    }
+    String subText = null;
+    Long postId = null;
+    if ("post".equals(documentType) || "post_title".equals(effectiveType)) {
+      subText = document.category();
+    } else if ("comment".equals(documentType)) {
+      subText = document.author();
+      postId = document.postId();
+    }
+    String highlightedText = highlightTitle
+      ? highlightedTitle
+      : highlightHtml(document.title(), keyword);
+    String highlightedSubText;
+    if ("comment".equals(documentType)) {
+      highlightedSubText = highlightedAuthor != null && !highlightedAuthor.isBlank()
+        ? highlightedAuthor
+        : highlightHtml(subText, keyword);
+    } else if ("post".equals(documentType) || "post_title".equals(effectiveType)) {
+      highlightedSubText = highlightedCategory != null && !highlightedCategory.isBlank()
+        ? highlightedCategory
+        : highlightHtml(subText, keyword);
+    } else {
+      highlightedSubText = highlightHtml(subText, keyword);
+    }
+    String highlightedExtra = snippetHtml != null ? snippetHtml : highlightHtml(snippet, keyword);
+    return new SearchResult(
+      effectiveType,
+      document.entityId(),
+      document.title(),
+      subText,
+      snippet,
+      postId,
+      highlightedText,
+      highlightedSubText,
+      highlightedExtra
+    );
+  }
+
+  private String firstHighlight(Map<String, List<String>> highlight, String... fields) {
+    if (highlight == null || fields == null) {
+      return null;
+    }
+    for (String field : fields) {
+      if (field == null) {
+        continue;
+      }
+      List<String> values = highlight.get(field);
+      if (values == null || values.isEmpty()) {
+        continue;
+      }
+      for (String value : values) {
+        if (value != null && !value.isBlank()) {
+          return value;
+        }
+      }
+    }
+    return null;
+  }
+
+  private String cleanHighlight(String value) {
+    if (value == null) {
+      return null;
+    }
+    return value.replaceAll("<[^>]+>", "");
+  }
+
+  private String fallbackSnippet(String content, String keyword, boolean fromStart) {
+    if (content == null) {
+      return "";
+    }
+    return extractSnippet(content, keyword, fromStart);
+  }
+
   private String extractSnippet(String content, String keyword, boolean fromStart) {
     if (content == null) return "";
     int limit = snippetLength;
@@ -165,12 +593,45 @@ public class SearchService {
     return snippet;
   }
 
+  private String highlightHtml(String text, String keyword) {
+    if (text == null) {
+      return null;
+    }
+    String normalizedKeyword = keyword == null ? "" : keyword.trim();
+    if (normalizedKeyword.isEmpty()) {
+      return HtmlUtils.htmlEscape(text);
+    }
+    Pattern pattern = Pattern.compile(
+      Pattern.quote(normalizedKeyword),
+      Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE
+    );
+    Matcher matcher = pattern.matcher(text);
+    if (!matcher.find()) {
+      return HtmlUtils.htmlEscape(text);
+    }
+    matcher.reset();
+    StringBuilder sb = new StringBuilder();
+    int lastEnd = 0;
+    while (matcher.find()) {
+      sb.append(HtmlUtils.htmlEscape(text.substring(lastEnd, matcher.start())));
+      sb.append("<mark>");
+      sb.append(HtmlUtils.htmlEscape(matcher.group()));
+      sb.append("</mark>");
+      lastEnd = matcher.end();
+    }
+    sb.append(HtmlUtils.htmlEscape(text.substring(lastEnd)));
+    return sb.toString();
+  }
+
   public record SearchResult(
     String type,
     Long id,
     String text,
     String subText,
     String extra,
-    Long postId
+    Long postId,
+    String highlightedText,
+    String highlightedSubText,
+    String highlightedExtra
   ) {}
 }

backend/src/main/java/com/openisle/service/TagService.java

@@ -5,6 +5,7 @@ import com.openisle.model.Tag;
 import com.openisle.model.User;
 import com.openisle.repository.TagRepository;
 import com.openisle.repository.UserRepository;
+import com.openisle.search.SearchIndexEventPublisher;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.cache.annotation.CacheEvict;
@@ -20,6 +21,7 @@ public class TagService {
   private final TagRepository tagRepository;
   private final TagValidator tagValidator;
   private final UserRepository userRepository;
+  private final SearchIndexEventPublisher searchIndexEventPublisher;
 
   @CacheEvict(value = CachingConfig.TAG_CACHE_NAME, allEntries = true)
   public Tag createTag(
@@ -43,7 +45,9 @@ public class TagService {
         .orElseThrow(() -> new com.openisle.exception.NotFoundException("User not found"));
       tag.setCreator(creator);
     }
-    return tagRepository.save(tag);
+    Tag saved = tagRepository.save(tag);
+    searchIndexEventPublisher.publishTagSaved(saved);
+    return saved;
   }
 
   public Tag createTag(
@@ -78,12 +82,15 @@ public class TagService {
     if (smallIcon != null) {
       tag.setSmallIcon(smallIcon);
     }
-    return tagRepository.save(tag);
+    Tag saved = tagRepository.save(tag);
+    searchIndexEventPublisher.publishTagSaved(saved);
+    return saved;
   }
 
   @CacheEvict(value = CachingConfig.TAG_CACHE_NAME, allEntries = true)
   public void deleteTag(Long id) {
     tagRepository.deleteById(id);
+    searchIndexEventPublisher.publishTagDeleted(id);
   }
 
   public Tag approveTag(Long id) {
@@ -91,7 +98,9 @@ public class TagService {
       .findById(id)
       .orElseThrow(() -> new IllegalArgumentException("Tag not found"));
     tag.setApproved(true);
-    return tagRepository.save(tag);
+    Tag saved = tagRepository.save(tag);
+    searchIndexEventPublisher.publishTagSaved(saved);
+    return saved;
   }
 
   public List<Tag> listPendingTags() {

backend/src/main/java/com/openisle/service/UserService.java

@@ -5,6 +5,7 @@ import com.openisle.exception.FieldException;
 import com.openisle.model.Role;
 import com.openisle.model.User;
 import com.openisle.repository.UserRepository;
+import com.openisle.search.SearchIndexEventPublisher;
 import com.openisle.service.AvatarGenerator;
 import com.openisle.service.PasswordValidator;
 import com.openisle.service.UsernameValidator;
@@ -34,6 +35,7 @@ public class UserService {
   private final RedisTemplate redisTemplate;
 
   private final EmailSender emailService;
+  private final SearchIndexEventPublisher searchIndexEventPublisher;
 
   public User register(
     String username,
@@ -58,7 +60,9 @@ public class UserService {
       //            u.setVerificationCode(genCode());
       u.setRegisterReason(reason);
       u.setApproved(mode == com.openisle.model.RegisterMode.DIRECT);
-      return userRepository.save(u);
+      User saved = userRepository.save(u);
+      searchIndexEventPublisher.publishUserSaved(saved);
+      return saved;
     }
 
     // ── 再按邮箱查 ───────────────────────────────────────────
@@ -75,7 +79,9 @@ public class UserService {
       //            u.setVerificationCode(genCode());
       u.setRegisterReason(reason);
       u.setApproved(mode == com.openisle.model.RegisterMode.DIRECT);
-      return userRepository.save(u);
+      User saved = userRepository.save(u);
+      searchIndexEventPublisher.publishUserSaved(saved);
+      return saved;
     }
 
     // ── 完全新用户 ───────────────────────────────────────────
@@ -89,14 +95,18 @@ public class UserService {
     user.setAvatar(avatarGenerator.generate(username));
     user.setRegisterReason(reason);
     user.setApproved(mode == com.openisle.model.RegisterMode.DIRECT);
-    return userRepository.save(user);
+    User saved = userRepository.save(user);
+    searchIndexEventPublisher.publishUserSaved(saved);
+    return saved;
   }
 
   public User registerWithInvite(String username, String email, String password) {
     User user = register(username, email, password, "", com.openisle.model.RegisterMode.DIRECT);
     user.setVerified(true);
     //        user.setVerificationCode(genCode());
-    return userRepository.save(user);
+    User saved = userRepository.save(user);
+    searchIndexEventPublisher.publishUserSaved(saved);
+    return saved;
   }
 
   private String genCode() {
@@ -209,7 +219,9 @@ public class UserService {
       .findByUsername(username)
       .orElseThrow(() -> new com.openisle.exception.NotFoundException("User not found"));
     user.setRegisterReason(reason);
-    return userRepository.save(user);
+    User saved = userRepository.save(user);
+    searchIndexEventPublisher.publishUserSaved(saved);
+    return saved;
   }
 
   public User updateProfile(String currentUsername, String newUsername, String introduction) {

backend/src/main/resources/application.properties

@@ -45,6 +45,18 @@ app.user.replies-limit=${USER_REPLIES_LIMIT:50}
 # Length of extracted snippets for posts and search (-1 to disable truncation)
 app.snippet-length=${SNIPPET_LENGTH:200}
 
+# OpenSearch integration
+app.search.enabled=${SEARCH_ENABLED:true}
+app.search.host=${SEARCH_HOST:localhost}
+app.search.port=${SEARCH_PORT:9200}
+app.search.scheme=${SEARCH_SCHEME:http}
+app.search.username=${SEARCH_USERNAME:}
+app.search.password=${SEARCH_PASSWORD:}
+app.search.index-prefix=${SEARCH_INDEX_PREFIX:openisle}
+app.search.highlight-fragment-size=${SEARCH_HIGHLIGHT_FRAGMENT_SIZE:${SNIPPET_LENGTH:200}}
+app.search.reindex-on-startup=${SEARCH_REINDEX_ON_STARTUP:true}
+app.search.reindex-batch-size=${SEARCH_REINDEX_BATCH_SIZE:500}
+
 # Captcha configuration
 app.captcha.enabled=${CAPTCHA_ENABLED:false}
 recaptcha.secret-key=${RECAPTCHA_SECRET_KEY:}

backend/src/test/java/com/openisle/controller/SearchControllerTest.java

@@ -68,9 +68,9 @@ class SearchControllerTest {
     c.setContent("nice");
     Mockito.when(searchService.globalSearch("n")).thenReturn(
       List.of(
-        new SearchService.SearchResult("user", 1L, "bob", null, null, null),
-        new SearchService.SearchResult("post", 2L, "hello", null, null, null),
-        new SearchService.SearchResult("comment", 3L, "nice", null, null, null)
+        new SearchService.SearchResult("user", 1L, "bob", null, null, null, null, null, null),
+        new SearchService.SearchResult("post", 2L, "hello", null, null, null, null, null, null),
+        new SearchService.SearchResult("comment", 3L, "nice", null, null, null, null, null, null)
       )
     );
 

backend/src/test/java/com/openisle/controller/TagControllerTest.java

@@ -82,6 +82,7 @@ class TagControllerTest {
     t.setIcon("i2");
     t.setSmallIcon("s2");
     Mockito.when(tagService.searchTags(null)).thenReturn(List.of(t));
+    Mockito.when(postService.countPostsByTagIds(List.of(2L))).thenReturn(java.util.Map.of());
 
     mockMvc
       .perform(get("/api/tags"))
@@ -93,6 +94,31 @@ class TagControllerTest {
       .andExpect(jsonPath("$[0].smallIcon").value("s2"));
   }
 
+  @Test
+  void listTagsWithPagination() throws Exception {
+    Tag t1 = new Tag();
+    t1.setId(1L);
+    t1.setName("java");
+    Tag t2 = new Tag();
+    t2.setId(2L);
+    t2.setName("spring");
+    Mockito.when(tagService.searchTags(null)).thenReturn(List.of(t1, t2));
+    Mockito.when(postService.countPostsByTagIds(List.of(1L, 2L))).thenReturn(
+      java.util.Map.of(1L, 1L, 2L, 5L)
+    );
+
+    mockMvc
+      .perform(get("/api/tags").param("page", "1").param("pageSize", "1"))
+      .andExpect(status().isOk())
+      .andExpect(jsonPath("$", org.hamcrest.Matchers.hasSize(1)))
+      .andExpect(jsonPath("$[0].id").value(1));
+
+    mockMvc
+      .perform(get("/api/tags").param("page", "2").param("pageSize", "1"))
+      .andExpect(status().isOk())
+      .andExpect(jsonPath("$", org.hamcrest.Matchers.hasSize(0)));
+  }
+
   @Test
   void updateTag() throws Exception {
     Tag t = new Tag();

backend/src/test/java/com/openisle/service/CommentServiceTest.java

@@ -11,6 +11,7 @@ import com.openisle.repository.PointHistoryRepository;
 import com.openisle.repository.PostRepository;
 import com.openisle.repository.ReactionRepository;
 import com.openisle.repository.UserRepository;
+import com.openisle.search.SearchIndexEventPublisher;
 import com.openisle.service.PointService;
 import org.junit.jupiter.api.Test;
 
@@ -29,6 +30,7 @@ class CommentServiceTest {
     PointHistoryRepository pointHistoryRepo = mock(PointHistoryRepository.class);
     PointService pointService = mock(PointService.class);
     ImageUploader imageUploader = mock(ImageUploader.class);
+    SearchIndexEventPublisher searchIndexEventPublisher = mock(SearchIndexEventPublisher.class);
 
     CommentService service = new CommentService(
       commentRepo,
@@ -41,7 +43,8 @@ class CommentServiceTest {
       nRepo,
       pointHistoryRepo,
       pointService,
-      imageUploader
+      imageUploader,
+      searchIndexEventPublisher
     );
 
     when(commentRepo.countByAuthorAfter(eq("alice"), any())).thenReturn(3L);

backend/src/test/java/com/openisle/service/PostServiceTest.java

@@ -6,6 +6,7 @@ import static org.mockito.Mockito.*;
 import com.openisle.exception.RateLimitException;
 import com.openisle.model.*;
 import com.openisle.repository.*;
+import com.openisle.search.SearchIndexEventPublisher;
 import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Optional;
@@ -42,6 +43,7 @@ class PostServiceTest {
     PostChangeLogService postChangeLogService = mock(PostChangeLogService.class);
     PointHistoryRepository pointHistoryRepository = mock(PointHistoryRepository.class);
     RedisTemplate redisTemplate = mock(RedisTemplate.class);
+    SearchIndexEventPublisher searchIndexEventPublisher = mock(SearchIndexEventPublisher.class);
 
     PostService service = new PostService(
       postRepo,
@@ -67,7 +69,8 @@ class PostServiceTest {
       postChangeLogService,
       pointHistoryRepository,
       PublishMode.DIRECT,
-      redisTemplate
+      redisTemplate,
+      searchIndexEventPublisher
     );
     when(context.getBean(PostService.class)).thenReturn(service);
 
@@ -118,6 +121,7 @@ class PostServiceTest {
     PostChangeLogService postChangeLogService = mock(PostChangeLogService.class);
     PointHistoryRepository pointHistoryRepository = mock(PointHistoryRepository.class);
     RedisTemplate redisTemplate = mock(RedisTemplate.class);
+    SearchIndexEventPublisher searchIndexEventPublisher = mock(SearchIndexEventPublisher.class);
 
     PostService service = new PostService(
       postRepo,
@@ -143,7 +147,8 @@ class PostServiceTest {
       postChangeLogService,
       pointHistoryRepository,
       PublishMode.DIRECT,
-      redisTemplate
+      redisTemplate,
+      searchIndexEventPublisher
     );
     when(context.getBean(PostService.class)).thenReturn(service);
 
@@ -207,6 +212,7 @@ class PostServiceTest {
     PostChangeLogService postChangeLogService = mock(PostChangeLogService.class);
     PointHistoryRepository pointHistoryRepository = mock(PointHistoryRepository.class);
     RedisTemplate redisTemplate = mock(RedisTemplate.class);
+    SearchIndexEventPublisher searchIndexEventPublisher = mock(SearchIndexEventPublisher.class);
 
     PostService service = new PostService(
       postRepo,
@@ -232,7 +238,8 @@ class PostServiceTest {
       postChangeLogService,
       pointHistoryRepository,
       PublishMode.DIRECT,
-      redisTemplate
+      redisTemplate,
+      searchIndexEventPublisher
     );
     when(context.getBean(PostService.class)).thenReturn(service);
 
@@ -283,6 +290,7 @@ class PostServiceTest {
     PostChangeLogService postChangeLogService = mock(PostChangeLogService.class);
     PointHistoryRepository pointHistoryRepository = mock(PointHistoryRepository.class);
     RedisTemplate redisTemplate = mock(RedisTemplate.class);
+    SearchIndexEventPublisher searchIndexEventPublisher = mock(SearchIndexEventPublisher.class);
 
     PostService service = new PostService(
       postRepo,
@@ -308,7 +316,8 @@ class PostServiceTest {
       postChangeLogService,
       pointHistoryRepository,
       PublishMode.DIRECT,
-      redisTemplate
+      redisTemplate,
+      searchIndexEventPublisher
     );
     when(context.getBean(PostService.class)).thenReturn(service);
 
@@ -375,6 +384,7 @@ class PostServiceTest {
     PostChangeLogService postChangeLogService = mock(PostChangeLogService.class);
     PointHistoryRepository pointHistoryRepository = mock(PointHistoryRepository.class);
     RedisTemplate redisTemplate = mock(RedisTemplate.class);
+    SearchIndexEventPublisher searchIndexEventPublisher = mock(SearchIndexEventPublisher.class);
 
     PostService service = new PostService(
       postRepo,
@@ -400,7 +410,8 @@ class PostServiceTest {
       postChangeLogService,
       pointHistoryRepository,
       PublishMode.DIRECT,
-      redisTemplate
+      redisTemplate,
+      searchIndexEventPublisher
     );
     when(context.getBean(PostService.class)).thenReturn(service);
 

backend/src/test/java/com/openisle/service/SearchServiceTest.java

@@ -9,7 +9,9 @@ import com.openisle.repository.CommentRepository;
 import com.openisle.repository.PostRepository;
 import com.openisle.repository.TagRepository;
 import com.openisle.repository.UserRepository;
+import com.openisle.search.OpenSearchProperties;
 import java.util.List;
+import java.util.Optional;
 import org.junit.jupiter.api.Test;
 import org.mockito.Mockito;
 
@@ -27,7 +29,9 @@ class SearchServiceTest {
       postRepo,
       commentRepo,
       categoryRepo,
-      tagRepo
+      tagRepo,
+      Optional.empty(),
+      new OpenSearchProperties()
     );
 
     Post post1 = new Post();

docker/.env.example

@@ -1,6 +1,11 @@
 # 前端访问端口
 SERVER_PORT=8080
 
+# OpenSearch 配置
+OPENSEARCH_PORT=9200
+OPENSEARCH_METRICS_PORT=9600
+OPENSEARCH_DASHBOARDS_PORT=5601
+
 # MySQL 配置
 MYSQL_ROOT_PASSWORD=toor
 

docker/DockerFile

@@ -0,0 +1,9 @@
+# opensearch
+FROM opensearchproject/opensearch:3.0.0
+RUN /usr/share/opensearch/bin/opensearch-plugin install -b analysis-icu
+RUN /usr/share/opensearch/bin/opensearch-plugin install -b \
+  https://github.com/aparo/opensearch-analysis-pinyin/releases/download/3.0.0/opensearch-analysis-pinyin.zip
+
+# ...
+
+

docker/docker-compose.yaml

@@ -14,6 +14,44 @@ services:
       - ../backend/src/main/resources/db/init:/docker-entrypoint-initdb.d
     networks:
       - openisle-network
+  
+  # OpenSearch Service
+  opensearch:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: opensearch
+    environment:
+      - cluster.name=os-single
+      - node.name=os-node-1
+      - discovery.type=single-node
+      - bootstrap.memory_lock=true
+      - OPENSEARCH_JAVA_OPTS=-Xms1g -Xmx1g
+      - DISABLE_SECURITY_PLUGIN=true
+      - cluster.blocks.create_index=false
+    ulimits:
+      memlock: { soft: -1, hard: -1 }
+      nofile:  { soft: 65536, hard: 65536 }
+    volumes:
+      - ./data:/usr/share/opensearch/data
+      - ./snapshots:/snapshots
+    ports:
+      - "${OPENSEARCH_PORT:-9200}:9200"
+      - "${OPENSEARCH_METRICS_PORT:-9600}:9600"
+    restart: unless-stopped
+
+  dashboards:
+    image: opensearchproject/opensearch-dashboards:3.0.0
+    container_name: os-dashboards
+    environment:
+      - OPENSEARCH_HOSTS=["http://opensearch:9200"]
+      - DISABLE_SECURITY_DASHBOARDS_PLUGIN=true
+    ports:
+      - "${OPENSEARCH_DASHBOARDS_PORT:-5601}:5601"
+    depends_on:
+      - opensearch
+    restart: unless-stopped
+
 
   # Java spring boot service
   springboot:

frontend_nuxt/assets/global.css

@@ -108,7 +108,6 @@ body {
 
 .vditor-toolbar--pin {
   top: calc(var(--header-height) + 1px) !important;
-  z-index: 20;
 }
 
 .vditor-panel {
@@ -134,26 +133,6 @@ body {
   animation: spin 1s linear infinite;
 }
 
-/* .vditor {
-  --textarea-background-color: transparent;
-  border: none !important;
-  box-shadow: none !important;
-}
-
-.vditor-reset {
-  color: var(--text-color);
-}
-
-.vditor-toolbar {
-  background: transparent !important;
-  border: none !important;
-  box-shadow: none !important;
-} */
-
-/* .vditor-toolbar {
-  position: relative !important;
-} */
-
 /*************************
  * Markdown 渲染样式
  *************************/
@@ -333,10 +312,6 @@ body {
     min-height: 100px;
   }
 
-  .vditor-toolbar {
-    overflow-x: auto;
-  }
-
   .about-content h1,
   .info-content-text h1 {
     font-size: 20px;
@@ -354,8 +329,8 @@ body {
     margin-bottom: 3px;
   }
 
-  .vditor-toolbar--pin {
-    top: 0 !important;
+  .vditor-panel {
+    min-width: 330px;
   }
 
   .about-content li,
@@ -367,11 +342,6 @@ body {
     line-height: 1.5;
   }
 
-  .vditor-panel {
-    position: relative;
-    min-width: 0;
-  }
-
   .d2h-file-name {
     font-size: 14px !important;
   }

frontend_nuxt/components/BaseUserAvatar.vue

@@ -1,18 +1,13 @@
 <template>
-  <component
-    :is="wrapperTag"
-    :to="isLink ? resolvedLink : undefined"
+  <NuxtLink
+    :to="resolvedLink"
     class="base-user-avatar"
     :class="wrapperClass"
     :style="wrapperStyle"
     v-bind="wrapperAttrs"
-    :role="isLink ? undefined : 'img'"
-    :aria-label="altText"
-    :title="altText"
   >
-    <span class="base-user-avatar-backdrop" aria-hidden="true" />
     <BaseImage :src="currentSrc" :alt="altText" class="base-user-avatar-img" @error="onError" />
-  </component>
+  </NuxtLink>
 </template>
 
 <script setup>
@@ -81,45 +76,15 @@ const sizeStyle = computed(() => {
   return { width: value, height: value }
 })
 
-const accentHue = computed(() => {
-  const seed = props.userId ?? props.alt
-  const source = seed !== undefined && seed !== null ? String(seed) : ''
-  if (!source) return 198
-  let hash = 0
-  for (let index = 0; index < source.length; index += 1) {
-    hash = (hash << 5) - hash + source.charCodeAt(index)
-    hash |= 0
-  }
-  return Math.abs(hash) % 360
-})
-
-const accentStyles = computed(() => {
-  const hue = accentHue.value
-  return {
-    '--avatar-accent': `hsl(${hue}, 74%, 54%)`,
-    '--avatar-accent-light': `hsl(${hue}, 95%, 82%)`,
-    '--avatar-accent-soft': `hsl(${hue}, 96%, 95%)`,
-    '--avatar-accent-border': `hsla(${hue}, 70%, 48%, 0.28)`,
-    '--avatar-accent-shadow': `hsla(${hue}, 68%, 36%, 0.2)`,
-  }
-})
-
 const wrapperStyle = computed(() => {
   const attrStyle = attrs.style
-  return [accentStyles.value, sizeStyle.value, attrStyle]
+  return [sizeStyle.value, attrStyle]
 })
 
-const isLink = computed(() => !props.disableLink && !!resolvedLink.value)
-
-const wrapperTag = computed(() => (isLink.value ? 'NuxtLink' : 'div'))
-
-const wrapperClass = computed(() => [
-  attrs.class,
-  { 'is-rounded': props.rounded, 'is-interactive': isLink.value },
-])
+const wrapperClass = computed(() => [attrs.class, { 'is-rounded': props.rounded }])
 
 const wrapperAttrs = computed(() => {
-  const { class: _class, style: _style, to: _to, href: _href, ...rest } = attrs
+  const { class: _class, style: _style, ...rest } = attrs
   return rest
 })
 
@@ -132,26 +97,24 @@ function onError() {
 
 <style scoped>
 .base-user-avatar {
-  position: relative;
   display: inline-flex;
   align-items: center;
   justify-content: center;
   overflow: hidden;
-  border-radius: 16px;
-  background: linear-gradient(
-    140deg,
-    var(--avatar-accent-soft, rgba(17, 182, 197, 0.12)) 0%,
-    var(--avatar-accent-light, rgba(17, 182, 197, 0.22)) 100%
-  );
-  border: 1px solid var(--avatar-accent-border, rgba(17, 182, 197, 0.2));
-  box-shadow:
-    0 1px 2px rgba(15, 52, 67, 0.08),
-    0 3px 8px var(--avatar-accent-shadow, rgba(17, 182, 197, 0.18));
-  transition:
-    transform 0.3s ease,
-    box-shadow 0.3s ease,
-    border-color 0.3s ease,
-    background 0.3s ease;
+  background-color: var(--avatar-placeholder-color, #f0f0f0);
+  /* 先用box-sizing: border-box，保证加border后宽高不变，圆形不变形 */
+  box-sizing: border-box;
+  border: 1.5px solid var(--normal-border-color);
+  transition: all 0.6s ease;
+}
+
+.base-user-avatar:hover {
+  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
+  transform: scale(1.05);
+}
+
+.base-user-avatar:active {
+  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
 }
 
 .base-user-avatar.is-rounded {
@@ -162,54 +125,10 @@ function onError() {
   border-radius: 0;
 }
 
-.base-user-avatar-backdrop {
-  position: absolute;
-  inset: 0;
-  pointer-events: none;
-  background:
-    radial-gradient(circle at 28% 28%, rgba(255, 255, 255, 0.72), transparent 62%),
-    linear-gradient(150deg, rgba(255, 255, 255, 0.08), transparent),
-    linear-gradient(
-      140deg,
-      var(--avatar-accent-soft, rgba(17, 182, 197, 0.08)) 0%,
-      var(--avatar-accent-light, rgba(17, 182, 197, 0.18)) 100%
-    );
-  opacity: 0.75;
-  transition:
-    opacity 0.35s ease,
-    transform 0.35s ease;
-  z-index: 0;
-}
-
 .base-user-avatar-img {
-  position: relative;
   width: 100%;
   height: 100%;
   object-fit: cover;
   display: block;
-  z-index: 1;
-  border-radius: inherit;
-  transition: transform 0.35s ease;
-}
-
-.base-user-avatar.is-interactive:hover,
-.base-user-avatar.is-interactive:focus-visible {
-  transform: translateY(-1px) scale(1.02);
-  border-color: var(--avatar-accent, var(--primary-color, #0a6e78));
-  box-shadow:
-    0 6px 16px var(--avatar-accent-shadow, rgba(17, 182, 197, 0.24)),
-    0 3px 6px rgba(15, 52, 67, 0.18);
-  outline: none;
-}
-
-.base-user-avatar.is-interactive:hover .base-user-avatar-backdrop,
-.base-user-avatar.is-interactive:focus-visible .base-user-avatar-backdrop {
-  opacity: 1;
-  transform: scale(1.05);
-}
-
-.base-user-avatar.is-interactive:hover .base-user-avatar-img,
-.base-user-avatar.is-interactive:focus-visible .base-user-avatar-img {
-  transform: scale(1.02);
 }
 </style>

frontend_nuxt/components/CommentItem.vue

@@ -15,6 +15,7 @@
       <div class="common-info-content-header">
         <div class="info-content-header-left">
           <span class="user-name">{{ comment.userName }}</span>
+          <span v-if="isCommentFromPostAuthor" class="op-badge" title="楼主">OP</span>
           <medal-one class="medal-icon" />
           <NuxtLink
             v-if="comment.medal"
@@ -157,6 +158,12 @@ const lightboxImgs = ref([])
 const loggedIn = computed(() => authState.loggedIn)
 const countReplies = (list) => list.reduce((sum, r) => sum + 1 + countReplies(r.reply || []), 0)
 const replyCount = computed(() => countReplies(props.comment.reply || []))
+const isCommentFromPostAuthor = computed(() => {
+  if (props.comment.userId == null || props.postAuthorId == null) {
+    return false
+  }
+  return String(props.comment.userId) === String(props.postAuthorId)
+})
 
 const toggleReplies = () => {
   showReplies.value = !showReplies.value
@@ -426,6 +433,21 @@ const handleContentClick = (e) => {
   color: var(--text-color);
 }
 
+.op-badge {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  margin-left: 6px;
+  padding: 0 6px;
+  height: 18px;
+  border-radius: 9px;
+  background-color: rgba(242, 100, 25, 0.12);
+  color: #f26419;
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 1;
+}
+
 .medal-icon {
   font-size: 12px;
   opacity: 0.6;

frontend_nuxt/components/Dropdown.vue

@@ -52,6 +52,7 @@
       v-if="open && !isMobile && (loading || filteredOptions.length > 0 || showSearch)"
       :class="['dropdown-menu', menuClass]"
       v-click-outside="close"
+      ref="menuRef"
     >
       <div v-if="showSearch" class="dropdown-search">
         <search-icon class="search-icon" />
@@ -80,6 +81,7 @@
             <span>{{ o.name }}</span>
           </slot>
         </div>
+        <slot name="footer" :close="close" :loading="loading" />
       </template>
     </div>
     <Teleport to="body">
@@ -88,7 +90,7 @@
           <next class="back-icon" @click="close" />
           <span class="mobile-title">{{ placeholder }}</span>
         </div>
-        <div class="dropdown-mobile-menu">
+        <div class="dropdown-mobile-menu" ref="mobileMenuRef">
           <div v-if="showSearch" class="dropdown-search">
             <search-icon class="search-icon" />
             <input type="text" v-model="search" placeholder="搜索" />
@@ -116,6 +118,7 @@
                 <span>{{ o.name }}</span>
               </slot>
             </div>
+            <slot name="footer" :close="close" :loading="loading" />
           </template>
         </div>
       </div>
@@ -151,6 +154,8 @@ export default {
     const loaded = ref(false)
     const loading = ref(false)
     const wrapper = ref(null)
+    const menuRef = ref(null)
+    const mobileMenuRef = ref(null)
     const isMobile = useIsMobile()
 
     const toggle = () => {
@@ -200,6 +205,17 @@ export default {
       }
     }
 
+    const scrollToBottom = () => {
+      const el = isMobile.value ? mobileMenuRef.value : menuRef.value
+      if (el) {
+        el.scrollTop = el.scrollHeight
+      }
+    }
+
+    const reload = async () => {
+      await loadOptions(props.remote ? search.value : undefined)
+    }
+
     watch(
       () => props.initialOptions,
       (val) => {
@@ -249,7 +265,7 @@ export default {
       return /^https?:\/\//.test(icon) || icon.startsWith('/')
     }
 
-    expose({ toggle, close })
+    expose({ toggle, close, reload, scrollToBottom })
 
     return {
       open,
@@ -259,6 +275,8 @@ export default {
       search,
       filteredOptions,
       wrapper,
+      menuRef,
+      mobileMenuRef,
       selectedLabels,
       isSelected,
       loading,

frontend_nuxt/components/MenuComponent.vue

@@ -116,30 +116,42 @@
             <div v-if="isLoadingTag" class="menu-loading-container">
               <l-hatch size="28" stroke="4" speed="3.5" color="var(--primary-color)"></l-hatch>
             </div>
-            <div 
-                v-else 
-                v-for="t in tagData" 
-                :key="t.id" 
-                class="section-item" 
-                :class="{ selected: isTagSelected(t.id) }" 
+            <template v-else>
+              <div
+                v-for="t in tagData"
+                :key="t.id"
+                class="section-item"
+                :class="{ selected: isTagSelected(t.id) }"
                 @click="gotoTag(t)"
               >
-              <BaseImage
-                v-if="isImageIcon(t.smallIcon || t.icon)"
-                :src="t.smallIcon || t.icon"
-                class="section-item-icon"
-                :alt="t.name"
-              />
-              <component
-                v-else-if="t.smallIcon || t.icon"
-                :is="t.smallIcon || t.icon"
-                class="section-item-icon"
-              />
-              <tag-one v-else class="section-item-icon" />
-              <span class="section-item-text"
-                >{{ t.name }} <span class="section-item-text-count">x {{ t.count }}</span></span
-              >
-            </div>
+                <BaseImage
+                  v-if="isImageIcon(t.smallIcon || t.icon)"
+                  :src="t.smallIcon || t.icon"
+                  class="section-item-icon"
+                  :alt="t.name"
+                />
+                <component
+                  v-else-if="t.smallIcon || t.icon"
+                  :is="t.smallIcon || t.icon"
+                  class="section-item-icon"
+                />
+                <tag-one v-else class="section-item-icon" />
+                <span class="section-item-text"
+                  >{{ t.name }} <span class="section-item-text-count">x {{ t.count }}</span></span
+                >
+              </div>
+              <div v-if="hasMoreTags || isLoadingMoreTags" class="section-item more-item">
+                <a
+                  v-if="hasMoreTags && !isLoadingMoreTags"
+                  href="#"
+                  class="more-link"
+                  @click.prevent="loadMoreTags"
+                >
+                  查看更多
+                </a>
+                <span v-else class="more-loading">加载中...</span>
+              </div>
+            </template>
           </div>
         </div>
       </div>
@@ -207,16 +219,88 @@ const {
   },
 )
 
+const TAG_PAGE_SIZE = 10
+const tagPage = ref(0)
+const hasMoreTags = ref(true)
+const isLoadingMoreTags = ref(false)
+
+const buildTagUrl = (page = 0) => {
+  const base = API_BASE_URL || (import.meta.client ? window.location.origin : '')
+  const url = new URL('/api/tags', base)
+  url.searchParams.set('page', String(page))
+  url.searchParams.set('pageSize', String(TAG_PAGE_SIZE))
+  return url.toString()
+}
+
+const fetchTagPage = async (page = 0) => {
+  try {
+    return await $fetch(buildTagUrl(page))
+  } catch (e) {
+    console.error('Failed to fetch tags', e)
+    return []
+  }
+}
+
 const {
   data: tagData,
   pending: isLoadingTag,
   error: tagError,
-} = await useAsyncData('menu:tags', () => $fetch(`${API_BASE_URL}/api/tags?limit=10`), {
+} = await useAsyncData('menu:tags', () => fetchTagPage(0), {
   server: true,
   default: () => [],
   staleTime: 5 * 60 * 1000,
 })
 
+const dedupeTags = (list) => Array.from(new Map(list.map((tag) => [tag.id, tag])).values())
+
+const initializeTagState = (val) => {
+  const initial = Array.isArray(val) ? val : []
+  if (!Array.isArray(val)) {
+    tagData.value = []
+  }
+  tagPage.value = 0
+  hasMoreTags.value = initial.length === TAG_PAGE_SIZE
+}
+
+initializeTagState(tagData.value)
+
+watch(
+  tagData,
+  (val, oldVal) => {
+    const next = Array.isArray(val) ? val : []
+    if (!Array.isArray(val)) {
+      tagData.value = []
+    }
+    const shouldReset =
+      !Array.isArray(oldVal) || oldVal.length > next.length || next.length <= TAG_PAGE_SIZE
+    if (shouldReset) {
+      tagPage.value = 0
+      hasMoreTags.value = next.length === TAG_PAGE_SIZE
+    }
+  },
+  { deep: false },
+)
+
+const loadMoreTags = async () => {
+  if (isLoadingMoreTags.value || !hasMoreTags.value) return
+  isLoadingMoreTags.value = true
+  const nextPage = tagPage.value + 1
+  try {
+    const result = await fetchTagPage(nextPage)
+    const data = Array.isArray(result) ? result : []
+    const existing = Array.isArray(tagData.value) ? tagData.value : []
+    tagData.value = dedupeTags([...existing, ...data])
+    tagPage.value = nextPage
+    if (data.length < TAG_PAGE_SIZE) {
+      hasMoreTags.value = false
+    }
+  } catch (e) {
+    console.error('Failed to load more tags', e)
+  } finally {
+    isLoadingMoreTags.value = false
+  }
+}
+
 /** 其余逻辑保持不变 */
 const iconClass = computed(() => {
   switch (themeState.mode) {
@@ -433,6 +517,27 @@ const gotoTag = (t) => {
   transition: background-color 0.5s ease;
 }
 
+.more-item {
+  justify-content: center;
+}
+
+.more-link {
+  color: var(--primary-color);
+  text-decoration: none;
+  font-size: 14px;
+  cursor: pointer;
+}
+
+.more-link:hover {
+  text-decoration: underline;
+}
+
+.more-loading {
+  font-size: 13px;
+  color: var(--menu-text-color);
+  opacity: 0.7;
+}
+
 .section-item:hover {
   background-color: var(--menu-selected-background-color-hover);
 }
@@ -441,7 +546,6 @@ const gotoTag = (t) => {
   background-color: var(--menu-selected-background-color);
 }
 
-
 .section-item-text-count {
   font-size: 12px;
   color: var(--menu-text-color);

frontend_nuxt/components/MessageEditor.vue

@@ -159,12 +159,6 @@ export default {
   border: 1px solid var(--border-color);
   border-radius: 8px;
 }
-
-.vditor {
-  min-height: 50px;
-  max-height: 150px;
-}
-
 .message-bottom-container {
   display: flex;
   flex-direction: row;

frontend_nuxt/components/SearchDropdown.vue

@@ -26,9 +26,20 @@
         <div class="search-option-item">
           <component :is="iconMap[option.type]" class="result-icon" />
           <div class="result-body">
-            <div class="result-main" v-html="highlight(option.text)"></div>
-            <div v-if="option.subText" class="result-sub" v-html="highlight(option.subText)"></div>
-            <div v-if="option.extra" class="result-extra" v-html="highlight(option.extra)"></div>
+            <div
+              class="result-main"
+              v-html="renderHighlight(option.highlightedText, option.text)"
+            ></div>
+            <div
+              v-if="option.subText"
+              class="result-sub"
+              v-html="renderHighlight(option.highlightedSubText, option.subText)"
+            ></div>
+            <div
+              v-if="option.extra"
+              class="result-extra"
+              v-html="renderHighlight(option.highlightedExtra, option.extra)"
+            ></div>
           </div>
         </div>
       </template>
@@ -70,16 +81,30 @@ const fetchResults = async (kw) => {
     subText: r.subText,
     extra: r.extra,
     postId: r.postId,
+    highlightedText: r.highlightedText,
+    highlightedSubText: r.highlightedSubText,
+    highlightedExtra: r.highlightedExtra,
   }))
   return results.value
 }
 
-const highlight = (text) => {
-  text = stripMarkdown(text)
-  if (!keyword.value) return text
-  const reg = new RegExp(keyword.value, 'gi')
-  const res = text.replace(reg, (m) => `<span class="highlight">${m}</span>`)
-  return res
+const escapeHtml = (value = '') =>
+  String(value)
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+    .replace(/'/g, '&#39;')
+
+const renderHighlight = (highlighted, fallback) => {
+  if (highlighted) {
+    return highlighted
+  }
+  const plain = stripMarkdown(fallback || '')
+  if (!plain) {
+    return ''
+  }
+  return escapeHtml(plain)
 }
 
 const iconMap = {
@@ -168,7 +193,7 @@ defineExpose({
   padding: 10px 20px;
 }
 
-:deep(.highlight) {
+:deep(mark) {
   color: var(--primary-color);
 }
 

frontend_nuxt/components/SearchPersonDropdown.vue

@@ -32,11 +32,14 @@
             :disable-link="true"
           />
           <div class="result-body">
-            <div class="result-main" v-html="highlight(option.username)"></div>
+            <div
+              class="result-main"
+              v-html="renderHighlight(option.highlightedUsername, option.username)"
+            ></div>
             <div
               v-if="option.introduction"
               class="result-sub"
-              v-html="highlight(option.introduction)"
+              v-html="renderHighlight(option.highlightedIntroduction, option.introduction)"
             ></div>
           </div>
         </div>
@@ -79,15 +82,29 @@ const fetchResults = async (kw) => {
     username: u.username,
     avatar: u.avatar,
     introduction: u.introduction,
+    highlightedUsername: u.highlightedText,
+    highlightedIntroduction: u.highlightedSubText || u.highlightedExtra,
   }))
   return results.value
 }
 
-const highlight = (text) => {
-  text = stripMarkdown(text || '')
-  if (!keyword.value) return text
-  const reg = new RegExp(keyword.value, 'gi')
-  return text.replace(reg, (m) => `<span class="highlight">${m}</span>`)
+const escapeHtml = (value = '') =>
+  String(value)
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+    .replace(/'/g, '&#39;')
+
+const renderHighlight = (highlighted, fallback) => {
+  if (highlighted) {
+    return highlighted
+  }
+  const plain = stripMarkdown(fallback || '')
+  if (!plain) {
+    return ''
+  }
+  return escapeHtml(plain)
 }
 
 watch(selected, async (val) => {
@@ -170,7 +187,7 @@ defineExpose({
   padding: 10px 20px;
 }
 
-:deep(.highlight) {
+:deep(mark) {
   color: var(--primary-color);
 }
 

frontend_nuxt/components/TagSelect.vue

@@ -1,5 +1,6 @@
 <template>
   <Dropdown
+    ref="dropdownRef"
     v-model="selected"
     :fetch-options="fetchTags"
     multiple
@@ -25,11 +26,23 @@
         <div v-if="option.description" class="option-desc">{{ option.description }}</div>
       </div>
     </template>
+    <template #footer>
+      <div v-if="hasMoreRemoteTags" class="dropdown-footer">
+        <a
+          href="#"
+          class="dropdown-more"
+          :class="{ disabled: loadMoreRequested }"
+          @click.prevent="loadMoreRemoteTags"
+        >
+          {{ loadMoreRequested ? '加载中...' : '查看更多' }}
+        </a>
+      </div>
+    </template>
   </Dropdown>
 </template>
 
 <script setup>
-import { computed, ref, watch } from 'vue'
+import { computed, reactive, ref, watch, nextTick } from 'vue'
 import { toast } from '~/main'
 import Dropdown from '~/components/Dropdown.vue'
 const config = useRuntimeConfig()
@@ -42,9 +55,19 @@ const props = defineProps({
   options: { type: Array, default: () => [] },
 })
 
+const dropdownRef = ref(null)
 const localTags = ref([])
 const providedTags = ref(Array.isArray(props.options) ? [...props.options] : [])
 
+const TAG_PAGE_SIZE = 10
+const remoteState = reactive({
+  keyword: '',
+  nextPage: 0,
+  hasMore: true,
+  options: [],
+})
+const loadMoreRequested = ref(false)
+
 watch(
   () => props.options,
   (val) => {
@@ -53,7 +76,7 @@ watch(
 )
 
 const mergedOptions = computed(() => {
-  const arr = [...providedTags.value, ...localTags.value]
+  const arr = [...providedTags.value, ...localTags.value, ...remoteState.options]
   return arr.filter((v, i, a) => a.findIndex((t) => t.id === v.id) === i)
 })
 
@@ -62,44 +85,93 @@ const isImageIcon = (icon) => {
   return /^https?:\/\//.test(icon) || icon.startsWith('/')
 }
 
-const buildTagsUrl = (kw = '') => {
+const buildTagsUrl = (kw = '', page = 0) => {
   const base = API_BASE_URL || (import.meta.client ? window.location.origin : '')
   const url = new URL('/api/tags', base)
 
   if (kw) url.searchParams.set('keyword', kw)
-  url.searchParams.set('limit', '10')
+  url.searchParams.set('page', String(page))
+  url.searchParams.set('pageSize', String(TAG_PAGE_SIZE))
 
   return url.toString()
 }
 
+const fetchRemoteTags = async (kw = '', page = 0) => {
+  const url = buildTagsUrl(kw, page)
+  try {
+    const res = await fetch(url)
+    if (res.ok) {
+      const data = await res.json()
+      return Array.isArray(data) ? data : []
+    }
+    throw new Error('failed to fetch tags')
+  } catch (e) {
+    console.error('Failed to fetch tags', e)
+    toast.error('获取标签失败')
+    throw e
+  }
+}
+
+const combineOptions = (remoteOptions = []) => {
+  const options = [...providedTags.value, ...localTags.value, ...remoteOptions]
+  return Array.from(new Map(options.map((t) => [t.id, t])).values())
+}
+
 const fetchTags = async (kw = '') => {
   const defaultOption = { id: 0, name: '无标签' }
 
-  // 1) 先拼 URL（自动兜底到 window.location.origin）
-  const url = buildTagsUrl(kw)
-
-  // 2) 拉数据
-  let data = []
-  try {
-    const res = await fetch(url)
-    if (res.ok) data = await res.json()
-  } catch {
-    toast.error('获取标签失败')
+  if (kw !== remoteState.keyword) {
+    remoteState.keyword = kw
+    remoteState.nextPage = 0
+    remoteState.options = []
+    remoteState.hasMore = true
   }
 
-  // 3) 合并、去重、可创建
-  let options = [...data, ...localTags.value]
+  const shouldFetch = remoteState.options.length === 0 || loadMoreRequested.value
+  if (shouldFetch) {
+    const pageToFetch = loadMoreRequested.value ? remoteState.nextPage : 0
+    try {
+      const data = await fetchRemoteTags(remoteState.keyword, pageToFetch)
+      if (pageToFetch === 0) {
+        remoteState.options = data
+      } else {
+        const existing = Array.isArray(remoteState.options) ? remoteState.options : []
+        const merged = [...existing, ...data]
+        remoteState.options = Array.from(new Map(merged.map((t) => [t.id, t])).values())
+      }
+      remoteState.hasMore = data.length === TAG_PAGE_SIZE
+      remoteState.nextPage = pageToFetch + 1
+    } catch (e) {
+      return [defaultOption, ...combineOptions(remoteState.options)]
+    } finally {
+      loadMoreRequested.value = false
+    }
+  }
+
+  let options = combineOptions(remoteState.options)
 
   if (props.creatable && kw && !options.some((t) => t.name.toLowerCase() === kw.toLowerCase())) {
     options.push({ id: `__create__:${kw}`, name: `创建"${kw}"` })
   }
 
-  options = Array.from(new Map(options.map((t) => [t.id, t])).values())
-
-  // 4) 最终结果
   return [defaultOption, ...options]
 }
 
+const hasMoreRemoteTags = computed(() => remoteState.hasMore)
+
+const loadMoreRemoteTags = async () => {
+  if (!remoteState.hasMore || loadMoreRequested.value) return
+  loadMoreRequested.value = true
+  try {
+    await dropdownRef.value?.reload()
+    await nextTick()
+    dropdownRef.value?.scrollToBottom?.()
+  } catch (e) {
+    console.error('Failed to load more tags', e)
+    loadMoreRequested.value = false
+  }
+}
+
 const selected = computed({
   get: () => props.modelValue,
   set: (v) => {
@@ -151,4 +223,21 @@ const selected = computed({
   font-weight: bold;
   opacity: 0.4;
 }
+
+.dropdown-footer {
+  padding: 8px 20px;
+  text-align: center;
+  border-top: 1px solid var(--normal-border-color);
+}
+
+.dropdown-more {
+  color: var(--primary-color);
+  text-decoration: none;
+  cursor: pointer;
+}
+
+.dropdown-more.disabled {
+  pointer-events: none;
+  opacity: 0.6;
+}
 </style>

frontend_nuxt/pages/index.vue

@@ -85,7 +85,7 @@
           </div>
 
           <div class="article-member-avatars-container">
-            <div v-for="member in article.members">
+            <div v-for="member in article.members" class="article-member-avatar-item">
               <BaseUserAvatar
                 class="article-member-avatar-item-img"
                 :src="member.avatar"