theme: make home the default page theme

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/theme/src/v4/baseTheme.ts

@@ -24,6 +24,7 @@ import { SimpleV4ThemeOptions } from './types';
 const DEFAULT_HTML_FONT_SIZE = 16;
 const DEFAULT_FONT_FAMILY =
   '"Helvetica Neue", Helvetica, Roboto, Arial, sans-serif';
+const DEFAULT_PAGE_THEME = 'home';
 
 /**
  * A helper for creating theme options.
@@ -37,7 +38,7 @@ export function createV4ThemeOptions(
     palette,
     htmlFontSize = DEFAULT_HTML_FONT_SIZE,
     fontFamily = DEFAULT_FONT_FAMILY,
-    defaultPageTheme,
+    defaultPageTheme = DEFAULT_PAGE_THEME,
     pageTheme = defaultPageThemes,
   } = options;
 

packages/theme/src/v4/types.ts

@@ -81,7 +81,7 @@ export interface BackstageTheme extends Theme {
  */
 export type SimpleV4ThemeOptions = {
   palette: PaletteOptions;
-  defaultPageTheme: string;
+  defaultPageTheme?: string;
   pageTheme?: Record<string, PageTheme>;
   fontFamily?: string;
   htmlFontSize?: number;