feat: Implement history tracking with new CLI commands for viewing past transcripts and usage statistics.

IO/TextInjector.cs

@@ -46,8 +46,9 @@ public static class TextInjector
         }
     }
 
-    public static async Task InjectStreamAsync(IAsyncEnumerable<string> tokenStream, string backend)
+    public static async Task<string> InjectStreamAsync(IAsyncEnumerable<string> tokenStream, string backend)
     {
+        string fullText = string.Empty;
         try
         {
             ProcessStartInfo pInfo;
@@ -77,13 +78,14 @@ public static class TextInjector
             }
 
             using var process = Process.Start(pInfo);
-            if (process == null) return;
+            if (process == null) return string.Empty;
 
             Logger.LogDebug("Started stream injection process, waiting for tokens...");
 
             await foreach (var token in tokenStream)
             {
                 Logger.LogDebug($"Injecting token: '{token}'");
+                fullText += token;
                 await process.StandardInput.WriteAsync(token);
                 await process.StandardInput.FlushAsync();
             }
@@ -97,5 +99,6 @@ public static class TextInjector
             Console.WriteLine($"[TextInjector] Error injecting text stream: {ex.Message}");
             Notifications.Notify("Injection Error", "Could not type text stream into window.");
         }
+        return fullText;
     }
 }