Apply color theme to HTML page itself (#2132)

bskyweb/templates/base.html

@@ -71,6 +71,7 @@
       overflow-y: auto;
       overscroll-behavior-y: none;
       text-rendering: optimizeLegibility;
+      background-color: var(--background);
       -webkit-font-smoothing: antialiased;
       -moz-osx-font-smoothing: grayscale;
       -ms-overflow-style: scrollbar;

src/state/shell/color-mode.tsx

@@ -23,6 +23,7 @@ export function Provider({children}: React.PropsWithChildren<{}>) {
   )
 
   React.useEffect(() => {
+    updateDocument(persisted.get('colorMode')) // set on load
     return persisted.onUpdate(() => {
       setState(persisted.get('colorMode'))
       updateDocument(persisted.get('colorMode'))

web/index.html

@@ -75,6 +75,7 @@
         overflow-y: auto;
         overscroll-behavior-y: none;
         text-rendering: optimizeLegibility;
+        background-color: var(--background);
         -webkit-font-smoothing: antialiased;
         -moz-osx-font-smoothing: grayscale;
         -ms-overflow-style: scrollbar;