🎵 feat: Cumulative Transcription Support for External STT (#9318)

* 🔧 fix: TTS and STT Services to use AppConfig

- Updated `getProviderSchema` and `getProvider` methods to accept an optional `appConfig` parameter, allowing for more flexible configuration retrieval.
- Improved error handling by ensuring that the app configuration is checked before accessing TTS and STT schemas.
- Refactored `processTextToSpeech` and `streamAudio` methods to utilize the new `appConfig` parameter for better clarity and maintainability.

* feat: Cumulative Transcription Support for STT External

* style: fix medium-sized styling for admin settings dialogs

client/src/components/Prompts/AdminSettings.tsx

@@ -153,7 +153,7 @@ const AdminSettings = () => {
             <span className="hidden sm:flex">{localize('com_ui_admin')}</span>
           </Button>
         </OGDialogTrigger>
-        <OGDialogContent className="max-w-lg border-border-light bg-surface-primary text-text-primary md:w-1/4">
+        <OGDialogContent className="max-w-lg border-border-light bg-surface-primary text-text-primary lg:w-1/4">
           <OGDialogTitle>
             {`${localize('com_ui_admin_settings')} - ${localize('com_ui_prompts')}`}
           </OGDialogTitle>