feat: improve reminders summarizer output and system metadata handling

JobTrackerApi.Tests/GmailControllerTests.cs

@@ -0,0 +1,41 @@
+using JobTrackerApi.Controllers;
+using JobTrackerApi.Models;
+using JobTrackerApi.Services;
+using Microsoft.AspNetCore.Mvc;
+using Moq;
+using Xunit;
+
+namespace JobTrackerApi.Tests;
+
+public sealed class GmailControllerTests
+{
+    [Fact]
+    public async Task Import_thread_rejects_missing_message_ids()
+    {
+        var controller = new GmailController(Mock.Of<IGmailOAuthService>(), null!, BuildConfig())
+        {
+            ControllerContext = new Microsoft.AspNetCore.Mvc.ControllerContext
+            {
+                HttpContext = new Microsoft.AspNetCore.Http.DefaultHttpContext
+                {
+                    User = new System.Security.Claims.ClaimsPrincipal(new System.Security.Claims.ClaimsIdentity(new[]
+                    {
+                        new System.Security.Claims.Claim(System.Security.Claims.ClaimTypes.NameIdentifier, "user-1")
+                    }, "test"))
+                }
+            }
+        };
+
+        var result = await controller.ImportThread(new GmailController.ImportGmailThreadRequest(1, "thread-1", Array.Empty<string>()), CancellationToken.None);
+
+        var badRequest = Assert.IsType<BadRequestObjectResult>(result.Result);
+        Assert.Equal("At least one messageId is required.", badRequest.Value);
+    }
+
+    private static Microsoft.Extensions.Configuration.IConfiguration BuildConfig()
+    {
+        return new Microsoft.Extensions.Configuration.ConfigurationBuilder()
+            .AddInMemoryCollection(new Dictionary<string, string?>())
+            .Build();
+    }
+}