perf: 更新项目默认配置参数

1. 更新项目 README
2. 更新默认 UserAgent
3. 默认图片格式修改为 JPEG
4. 修正项目描述错误

source/module/manager.py

@@ -158,7 +158,7 @@ class Manager:
             "avif",
         }:
             return i
-        return "png"
+        return "jpeg"
 
     @staticmethod
     def is_exists(path: Path) -> bool:

source/module/settings.py

@@ -21,7 +21,7 @@ class Settings:
         "chunk": 1024 * 1024 * 2,  # 下载块大小(字节)
         "max_retry": 5,  # 最大重试次数
         "record_data": False,  # 是否记录作品数据
-        "image_format": "PNG",  # 图文作品格式
+        "image_format": "JPEG",  # 图文作品格式
         "image_download": True,  # 是否下载图文
         "video_download": True,  # 是否下载视频
         "live_download": False,  # 是否下载动图

source/module/static.py

@@ -16,7 +16,10 @@ RELEASES = "https://github.com/JoeanAmier/XHS-Downloader/releases/latest"
 
 USERSCRIPT = "https://raw.githubusercontent.com/JoeanAmier/XHS-Downloader/master/static/XHS-Downloader.js"
 
-USERAGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36"
+USERAGENT = (
+    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 "
+    "Safari/537.36 Edg/143.0.0.0"
+)
 
 HEADERS = {
     "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,"