Function setTheme

setTheme(newTheme: ThemeMode): Promise<boolean>
Sets the application theme to the specified mode and updates the DOM and local storage.
Parameters
- newTheme: ThemeMode
  The new theme mode to set ("dark", "light", or "system").
Returns Promise<boolean>
A promise that resolves to true if dark mode is enabled, false otherwise.
Remarks
Also dispatches a "themeToggled" event on the document.
Source
```
export async function setTheme(newTheme: ThemeMode) {
  // Delegate to the explicit mode methods for clarity and single-responsibility
  switch (newTheme) {
    case "dark":
      return enableDarkMode();
    case "light":
      return enableLightMode();
    case "system":
    default:
      return applySystemTheme();
  }
}
```
- Defined in src/helpers/theme_helpers.ts:55

src