refactor: clean up DSThemeProvider comments

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jungcome7

apps/extension/src/theme/index.tsx

@@ -104,9 +104,8 @@ export const AppThemeProvider: FunctionComponent<PropsWithChildren> = ({
       }}
     >
       <DSThemeProvider defaultTheme={displayTheme}>
-        <ThemeProvider theme={{ mode: displayTheme }}>
-          {children}
-        </ThemeProvider>
+        {/* TODO: Remove after DS migration is complete */}
+        <ThemeProvider theme={{ mode: displayTheme }}>{children}</ThemeProvider>
       </DSThemeProvider>
     </AppThemeContext.Provider>
   );

packages/design-system/src/theme/ds-theme-provider.tsx

@@ -23,7 +23,6 @@ export const DSThemeProvider: React.FC<DSThemeProviderProps> = ({
   defaultTheme = "dark",
   externalMode = false,
 }) => {
-  // Inject static stylesheet once (contains both dark and light rules)
   useLayoutEffect(() => {
     if (externalMode) return;
     const styleId = "ds-theme-vars";
@@ -35,7 +34,6 @@ export const DSThemeProvider: React.FC<DSThemeProviderProps> = ({
     }
   }, [externalMode]);
 
-  // Switch active theme via data attribute
   useLayoutEffect(() => {
     document.documentElement.setAttribute("data-ds-theme", defaultTheme);
   }, [defaultTheme]);