Added transcription providers (#619)

app/MindWork AI Studio/Settings/DataModel/Data.cs

@@ -25,6 +25,11 @@ public sealed class Data
     /// A collection of embedding providers configured.
     /// </summary>
     public List<EmbeddingProvider> EmbeddingProviders { get; init; } = [];
+    
+    /// <summary>
+    /// A collection of speech providers configured.
+    /// </summary>
+    public List<TranscriptionProvider> TranscriptionProviders { get; init; } = [];
 
     /// <summary>
     /// A collection of data sources configured.
@@ -52,9 +57,14 @@ public sealed class Data
     public uint NextProviderNum { get; set; } = 1;
 
     /// <summary>
-    /// The next embedding number to use.
+    /// The next embedding provider number to use.
     /// </summary>
     public uint NextEmbeddingNum { get; set; } = 1;
+    
+    /// <summary>
+    /// The next transcription provider number to use.
+    /// </summary>
+    public uint NextTranscriptionNum { get; set; } = 1;
 
     /// <summary>
     /// The next data source number to use.

app/MindWork AI Studio/Settings/DataModel/PreviewFeaturesExtensions.cs

@@ -14,7 +14,7 @@ public static class PreviewFeaturesExtensions
         PreviewFeatures.PRE_PLUGINS_2025 => TB("Plugins: Preview of our plugin system where you can extend the functionality of the app"),
         PreviewFeatures.PRE_READ_PDF_2025 => TB("Read PDF: Preview of our PDF reading system where you can read and extract text from PDF files"),
         PreviewFeatures.PRE_DOCUMENT_ANALYSIS_2025 => TB("Document Analysis: Preview of our document analysis system where you can analyze and extract information from documents"),
-        PreviewFeatures.PRE_SPEECH_TO_TEXT_2026 => TB("Speech to Text: Preview of our speech to text system where you can transcribe recordings and audio files into text"),
+        PreviewFeatures.PRE_SPEECH_TO_TEXT_2026 => TB("Transcription: Preview of our speech to text system where you can transcribe recordings and audio files into text"),
         
         _ => TB("Unknown preview feature")
     };