chore: v5.7.0

- Remove APlayer/Meting music player support
- Upgrade Artalk to 2.10.0 and add vote feature
- Cache plugins.yml to avoid re-rendering on every generate
- Add null safety for error_404 and highlight config
- Fix series date timestamp format
- Enhance shuoshuo mockPost compatibility and error handling
- Prevent scrollbar flicker when fancybox is open
- Update plugin versions (docsearch, katex, twikoo)
- Bump version to 5.7.0

source/js/utils.js

@@ -243,9 +243,10 @@
                   ],
                   right: ['slideshow', 'thumbs', 'close']
                 }
-              }
+              },
+              hideScrollbar: false
             }
-          } else {
+          } else {
             options = {
               Hash: false,
               Carousel: {
@@ -274,7 +275,8 @@
                     maxScale: 4
                   }
                 }
-              }
+              },
+              hideScrollbar: false
             }
           }