🐛 为各主题添加 repost 的渲染 (#505)

* 🐛 为各主题添加 repost 的渲染

* ✨ 调整渲染结果

* ✅ 更新测试

nonebot_bison/theme/themes/basic/build.py

@@ -20,15 +20,27 @@ class BasicTheme(Theme):
     async def render(self, post: "Post") -> list[MessageSegmentFactory]:
         text = ""
 
-        if post.title:
-            text += f"{post.title}\n\n"
+        text += f"{post.title}\n\n" if post.title else ""
 
         text += post.content if len(post.content) < 500 else f"{post.content[:500]}..."
 
-        text += f"\n来源: {post.platform.name} {post.nickname or ''}\n"
+        if rp := post.repost:
+            text += f"\n--------------\n转发自 {rp.nickname or ''}:\n"
+            text += f"{rp.title}\n\n" if rp.title else ""
+            text += rp.content if len(rp.content) < 500 else f"{rp.content[:500]}..."
 
+        text += "\n--------------\n"
+
+        text += f"来源: {post.platform.name} {post.nickname or ''}\n"
+
+        urls: list[str] = []
+        if rp and rp.url:
+            urls.append(f"转发详情：{rp.url}")
         if post.url:
-            text += f"详情: {post.url}"
+            urls.append(f"详情: {post.url}")
+
+        if urls:
+            text += "\n".join(urls)
 
         msgs: list[MessageSegmentFactory] = [Text(text)]
         if post.images: