feat(app): 推荐流支持分类过滤

fruitshorts-module-content/src/main/java/com/fruitshorts/content/service/DramaMultiTagSupport.java

@@ -99,6 +99,19 @@ final class DramaMultiTagSupport {
         });
     }
 
+    static void applyCategoryIdTokens(QueryWrapper<Drama> wrapper,
+                                      List<Long> categoryIds) {
+        wrapper.and(nested -> {
+            for (int index = 0; index < categoryIds.size(); index++) {
+                if (index > 0) {
+                    nested.or();
+                }
+                nested.apply("(',' || category_ids || ',') LIKE {0}",
+                        tokenPattern(categoryIds.get(index)));
+            }
+        });
+    }
+
     static List<String> parseDramaTypes(Drama drama) {
         List<String> values = parseStringTokens(drama.getDramaTypes()).stream()
                 .map(DramaMultiTagSupport::normalizeDramaType)

fruitshorts-module-content/src/main/java/com/fruitshorts/content/service/DramaService.java

@@ -237,20 +237,26 @@ public class DramaService {
      * App 推荐流：按推荐权重、热度、ID 倒序，并支持内容类型多选。
      * cursor 使用上一页最后一条 ID，服务端反查排序键后做 keyset 查询。
      */
-    public List<Drama> listPublishedFeed(List<String> dramaTypes, Long cursor, int limit) {
+    public List<Drama> listPublishedFeed(
+            List<String> dramaTypes, Long categoryId, Long cursor, int limit) {
         List<String> normalizedTypes = DramaMultiTagSupport.normalizeDramaTypes(dramaTypes);
         QueryWrapper<Drama> query = new QueryWrapper<>();
         query.eq("status", ContentStatus.PUBLISHED.getCode());
         if (!normalizedTypes.isEmpty()) {
             DramaMultiTagSupport.applyDramaTypeTokens(query, normalizedTypes);
         }
+        if (categoryId != null) {
+            DramaMultiTagSupport.applyCategoryIdTokens(query, List.of(categoryId));
+        }
         if (cursor != null) {
             Drama marker = dramaMapper.selectById(cursor);
             if (marker == null
                     || !ContentStatus.PUBLISHED.getCode().equals(marker.getStatus())
                     || (!normalizedTypes.isEmpty()
                     && DramaMultiTagSupport.parseDramaTypes(marker).stream()
-                    .noneMatch(normalizedTypes::contains))) {
+                    .noneMatch(normalizedTypes::contains))
+                    || (categoryId != null
+                    && !DramaMultiTagSupport.parseCategoryIds(marker).contains(categoryId))) {
                 return List.of();
             }
             applyFeedCursor(query, marker);