fix: remove hard break restriction in headings and adjust line heights in WysiwygThemeWrapper

Author: drl990114

src/editor/extensions/Heading/heading-extension.ts

@@ -17,7 +17,6 @@ export class LineHeadingExtension extends HeadingExtension {
   createNodeSpec(extra: ApplySchemaAttributes, override: NodeSpecOverride): NodeExtensionSpec {
     return {
       ...super.createNodeSpec(extra, override),
-      content: 'text*', // Disallow hard breaks in headings
     }
   }
 

src/editor/theme/WysiwygThemeWrapper.tsx

@@ -102,7 +102,6 @@ export const WysiwygThemeWrapper = styled.div.attrs<WarpperProps>((p) => ({
       Consolas,
       Liberation Mono,
       monospace;
-    line-height: 10px;
     color: ${(props) => props.theme.kbdFontColor};
     vertical-align: middle;
     background-color: ${(props) => props.theme.kbdBgColor};
@@ -736,10 +735,12 @@ export const WysiwygThemeWrapper = styled.div.attrs<WarpperProps>((p) => ({
     max-width: 400px;
     border-radius: 0.2em;
     background-color: ${(props) => props.theme.bgColor};
+    line-height: normal;
     z-index: 1;
   }
 
   .inline-html-render {
+    line-height: normal;
   }
 
   .html-node {