🎵 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

api/server/services/Files/Audio/STTService.js

@@ -109,9 +109,11 @@ class STTService {
    * @throws {Error} If no STT schema is set, multiple providers are set, or no provider is set.
    */
   async getProviderSchema(req) {
-    const appConfig = await getAppConfig({
-      role: req?.user?.role,
-    });
+    const appConfig =
+      req.config ??
+      (await getAppConfig({
+        role: req?.user?.role,
+      }));
     const sttSchema = appConfig?.speech?.stt;
     if (!sttSchema) {
       throw new Error(