Fixed error messages

Components/Pages/Home.razor

@@ -5,6 +5,7 @@
 @using Markdig
 @using Microsoft.AspNetCore.Components
 @using System.Runtime.CompilerServices
+@using System.Text.Json
 @using Microsoft.SemanticKernel
 @rendermode InteractiveServer
 
@@ -59,7 +60,7 @@
                                 </div>
                                 <div class="col-md-6">
                                     <label for="OpenAI_ApiKey" class="form-label">API Key</label>
-                                    <InputText class="form-control" type="password"  id="OpenAI_ApiKey" @bind-Value="temporaryConfig.OpenAI_ApiKey" placeholder="Enter API Key" />
+                                    <InputText class="form-control" type="password" id="OpenAI_ApiKey" @bind-Value="temporaryConfig.OpenAI_ApiKey" placeholder="Enter API Key" />
                                 </div>
                             </div>
                         </div>
@@ -98,6 +99,13 @@
                     {
                         <img src="@ImageUrl" alt="Preview Image" class="img-fluid rounded" style="max-height: 150px;" />
                     }
+                    else if (!string.IsNullOrWhiteSpace(isUploadingImage))
+                    {
+                        <div class="d-flex justify-content-center">
+                            <div class="spinner-border text-primary" role="status">
+                            </div>
+                        </div>
+                    }
                 </div>
             </div>
         </div>
@@ -109,7 +117,6 @@
                     {
                         <div class="d-flex justify-content-center">
                             <div class="spinner-border text-primary" role="status">
-                                <span class="visually-hidden">Loading...</span>
                             </div>
                         </div>
                     }
@@ -132,7 +139,6 @@
                     {
                         <div class="d-flex justify-content-center">
                             <div class="spinner-border text-primary" role="status">
-                                <span class="visually-hidden">Loading...</span>
                             </div>
                         </div>
                     }
@@ -208,7 +214,7 @@
         duplicateSpace = Config.GetValue<string>("HFDuplicateSpace") ?? string.Empty;
         if (!_foodCheckerService.IsValid())
         {
-            errorMessage = "API keys missing from config. Add temporary keys (Space must be public for accessing image URLs)";
+            errorMessage = "API keys missing from config";
         }
     }
 
@@ -221,6 +227,8 @@
 
     private async Task HandleSelectedFiles(InputFileChangeEventArgs e)
     {
+        ImageUrl = string.Empty;
+        errorMessage = string.Empty;
         isUploadingImage = "disabled";
         var imageFile = e.File;
         await InvokeAsync(() => this.StateHasChanged());
@@ -243,7 +251,6 @@
         }
         isUploadingImage = string.Empty;
         await InvokeAsync(() => this.StateHasChanged());
-
     }
 
     private async Task<ReadOnlyMemory<byte>> ReadFileBytes(IBrowserFile imageFile)
@@ -299,17 +306,25 @@
                 }
             }
         }
-        catch(HttpOperationException hEx)
+        catch (HttpOperationException hEx)
         {
             if (hEx.StatusCode == System.Net.HttpStatusCode.TooManyRequests)
             {
-                errorMessage = $"Rate Limit Exceeded. Please try again Later";
+                errorMessage = "Rate Limit Exceeded. Please try again Later";
+            }
+            else if (hEx.StatusCode == System.Net.HttpStatusCode.BadRequest)
+            {
+                using JsonDocument doc = JsonDocument.Parse(hEx.ResponseContent);
+                JsonElement root = doc.RootElement;
+                string message = root.GetProperty("error").GetProperty("message").GetString();
+                Console.WriteLine(message);
+                errorMessage = message;
             }
         }
         catch (Exception ex)
         {
             Console.WriteLine(ex.Message);
-            errorMessage = $"Error: An unexpected error has occurred";
+            errorMessage = "Error: An unexpected error has occurred";
         }
         finally
         {

SemanticKernel/Plugins/FoodCheckerPlugin.cs

@@ -58,7 +58,7 @@ namespace FoodHealthChecker.SemanticKernel.Plugins
     }
     public static class FoodCheckerTemplates
     {
-        public const string SystemMessage = @"You are a AI Food expert";
+        public const string SystemMessage = @"You are an AI Food expert with extensive knowledge in Nutrion";
 
         public const string CheckFoodHealth =
 @"
@@ -70,6 +70,7 @@ Also list any cancer causing or harmful substances if present.
 [RESPONSE]
 **Predicted Rating**
 **Reasoning**
+**Harmful substances**
 ";
 
         public const string GetIngredients =