added basic flow and prompting

services/lmstudioservice.cs

@@ -93,6 +93,42 @@ namespace finder2e_foundry_converter.Services
             }
         }
 
+        public async Task<string> AskAsync(string baseUrl, string model, string prompt, List<string> imagePaths)
+        {
+            // LM Studio expects messages content; reuse the same structure but with a simple text message
+            try
+            {
+                var requestBody = new
+                {
+                    model = model,
+                    messages = new[]
+                    {
+                        new { role = "user", content = new[] { new { type = "text", text = prompt } } }
+                    }
+                };
+
+                var response = await _httpClient.PostAsJsonAsync($"{baseUrl.TrimEnd('/')}/v1/chat/completions", requestBody);
+                var body = await response.Content.ReadAsStringAsync();
+
+                using var doc = JsonDocument.Parse(body);
+                if (doc.RootElement.TryGetProperty("error", out var error))
+                {
+                    return $"Error: {error.GetProperty("message").GetString()}";
+                }
+
+                if (doc.RootElement.TryGetProperty("choices", out var choices) && choices.GetArrayLength() > 0)
+                {
+                    return choices[0].GetProperty("message").GetProperty("content").GetString() ?? "No content returned";
+                }
+
+                return "No response choices returned.";
+            }
+            catch (Exception ex)
+            {
+                return $"Error: {ex.Message}";
+            }
+        }
+
         private class ModelsResponse
         {
             [JsonPropertyName("data")]