img's have max-width: 100% to avoid overflowing of big images

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## [unreleased]
+
+* default theme: `img` have now `max-width: 100%` by default to avoid very
+  large images overflowing
+
 ## [2.0.0] - 2023-06-16
 
 ### Breaking

blag/static/style.css

@@ -48,6 +48,10 @@ aside {
     color: var(--foreground-dim);
 }
 
+img {
+    max-width: 100%;
+}
+
 h1,
 h2,
 h3,