fix: theme persistence and update version to 2.1.9-beta9

vite-frontend/src/themes/context.tsx

@@ -29,7 +29,6 @@ import {
   getSavedMode,
   saveMode,
   getEffectiveMode,
-  initThemeSystem,
   registerTheme,
   unregisterTheme,
   type ThemeMode,
@@ -95,11 +94,6 @@ export const ThemeProvider: React.FC<ThemeProviderProps> = ({ children }) => {
   // Re-render whenever register changes
   useSyncExternalStore(originalSubscribe, getSnapshot);
 
-  // Initialise on mount
-  useEffect(() => {
-    initThemeSystem();
-  }, []);
-
   // Listen for system mode changes
   useEffect(() => {
     const mq = window.matchMedia("(prefers-color-scheme: dark)");