fix: resolve single-line code block wrapping issue (#121)

white-space should be pre-wrap - or else, a single long line of code block may break the layout of whole page on mobile devices

use word break for code and blockquote, white-space: pre for fenced code

src/styles/base.css

@@ -115,9 +115,12 @@
     @apply bg-skin-card-muted;
   }
 
-  code {
+  code, blockquote {
+    word-wrap: break-word;
+  }
+
+  pre > code {
     white-space: pre;
-    overflow: scroll;
   }
 }