Added the visual briefing assistant (#893)

app/MindWork AI Studio/Tools/Media/IMediaTranscriptStorage.cs

@@ -0,0 +1,30 @@
+using AIStudio.Chat;
+
+namespace AIStudio.Tools.Media;
+
+/// <summary>
+/// Persists a completed media transcript for a feature-specific owner.
+/// </summary>
+public interface IMediaTranscriptStorage
+{
+    /// <summary>
+    /// Determines whether this storage handles the specified media-import owner.
+    /// </summary>
+    /// <param name="owner">The feature-specific media-import owner.</param>
+    /// <returns><see langword="true"/> when the transcript can be stored.</returns>
+    bool CanStore(MediaImportOwner owner);
+
+    /// <summary>
+    /// Persists a completed transcript and returns the attachment exposed to the calling workflow.
+    /// </summary>
+    /// <param name="target">The stable media-import target.</param>
+    /// <param name="originalMediaPath">The original media path.</param>
+    /// <param name="transcript">The completed transcript text.</param>
+    /// <param name="token">The cancellation token.</param>
+    /// <returns>The attachment representing the persisted transcript.</returns>
+    Task<FileAttachment> StoreAsync(
+        MediaImportTarget target,
+        string originalMediaPath,
+        string transcript,
+        CancellationToken token);
+}