Fix sendable warning in whispercontext

VoiceInk/Whisper/LibWhisper.swift

@@ -104,19 +104,21 @@ actor WhisperContext {
     }
 
     static func createContext(path: String) async throws -> WhisperContext {
+        // Create the context in an isolated task
         return try await Task.detached {
             var params = whisper_context_default_params()
             #if targetEnvironment(simulator)
             params.use_gpu = false
             print("Running on the simulator, using CPU")
             #endif
-            let context = whisper_init_from_file_with_params(path, params)
-            if let context {
-                return WhisperContext(context: context)
-            } else {
+            
+            guard let contextPtr = whisper_init_from_file_with_params(path, params) else {
                 print("Couldn't load model at \(path)")
                 throw WhisperError.couldNotInitializeContext
             }
+            
+            // Create the actor instance directly in this task
+            return WhisperContext(context: contextPtr)
         }.value
     }