fix: exclude svg from height:auto media rule

Inline SVGs without a viewBox have no intrinsic aspect ratio, so height:auto causes them to collapse or clip. This matches the approach used by Pico CSS, Water.css, Simple.css, and most classless libraries.

Author: Leftium

src/_media.scss

@@ -8,11 +8,17 @@
 
 @layer nimble.base {
 
-  :where(img, video, canvas, svg) {
+  :where(img, video, canvas) {
     max-width: 100%;
     height: auto;
   }
 
+  // SVG gets max-width but NOT height:auto — inline SVGs without viewBox
+  // have no intrinsic aspect ratio, so height:auto breaks them.
+  :where(svg) {
+    max-width: 100%;
+  }
+
   :where(figure) {
     margin: 0;
   }