fix(work-orders): return 400 for invalid advanced-search custom date range

Map ArgumentException from datePreset=custom without dates to BadRequest so the endpoint matches the Phase 4 contract.

Api.SeaHavenIndustries.Tests/WorkOrderControllerSearchTests.cs

@@ -0,0 +1,101 @@
+using Api.SeaHavenIndustries.Controllers;
+using Api.SeaHavenIndustries.DTOs;
+using Data.SeaHavenIndustries;
+using FluentAssertions;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Moq;
+using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.DTOs;
+using SeaHaven.Services.Helpers;
+using SeaHaven.Services.Implementation;
+using SeaHaven.Services.Interfaces;
+using Xunit;
+
+namespace Api.SeaHavenIndustries.Tests;
+
+public class WorkOrderControllerSearchTests
+{
+    private static ApplicationDbContext NewContext()
+    {
+        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
+            .UseInMemoryDatabase(Guid.NewGuid().ToString())
+            .Options;
+        return new ApplicationDbContext(options);
+    }
+
+    private static UserManager<ApplicationUser> MockUserManager()
+    {
+        var store = new Mock<IUserStore<ApplicationUser>>();
+        return new Mock<UserManager<ApplicationUser>>(
+            store.Object, null!, null!, null!, null!, null!, null!, null!, null!).Object;
+    }
+
+    private static WorkOrderController NewController(
+        ApplicationDbContext ctx,
+        IWorkOrderAdvancedSearchService advancedSearch)
+    {
+        var controller = new WorkOrderController(
+            MockUserManager(),
+            Mock.Of<IWorkOrderService>(),
+            Mock.Of<IWorkOrderDataService>(),
+            Mock.Of<ICommentDataService>(),
+            Mock.Of<IQuotesDataService>(),
+            Mock.Of<IUserDataService>(),
+            Mock.Of<IDispatchDataService>(),
+            Mock.Of<IVendorDataService>(),
+            Mock.Of<ITaskListTemplateDataService>(),
+            ctx,
+            Mock.Of<IWebHostEnvironment>(),
+            Mock.Of<IHttpContextAccessor>(),
+            null!,
+            null!,
+            Mock.Of<IConfiguration>(),
+            Mock.Of<IWorkOrderBoardService>(),
+            Mock.Of<IWorkOrderBoardUpdateService>(),
+            Mock.Of<IWorkOrderBoardCreateService>(),
+            Mock.Of<IWorkOrderBoardCancelService>(),
+            advancedSearch);
+
+        controller.ControllerContext = new ControllerContext
+        {
+            HttpContext = new DefaultHttpContext
+            {
+                User = new System.Security.Claims.ClaimsPrincipal(
+                    new System.Security.Claims.ClaimsIdentity(
+                        new[]
+                        {
+                            new System.Security.Claims.Claim(
+                                System.Security.Claims.ClaimTypes.NameIdentifier,
+                                "test-user")
+                        },
+                        "Test"))
+            }
+        };
+
+        return controller;
+    }
+
+    [Fact]
+    public async Task SearchBoard_WhenCustomPresetMissingDates_ReturnsBadRequest()
+    {
+        using var ctx = NewContext();
+        var advancedSearch = new WorkOrderAdvancedSearchService(
+            Mock.Of<IWorkOrderAdvancedSearchDataService>());
+        var controller = NewController(ctx, advancedSearch);
+
+        var result = await controller.SearchBoard(new WorkOrderAdvancedSearchQueryDto
+        {
+            DatePreset = WorkOrderAdvancedSearchDatePreset.Custom
+        });
+
+        var badRequest = result.Should().BeOfType<BadRequestObjectResult>().Subject;
+        var body = badRequest.Value.Should().BeOfType<Response>().Subject;
+        body.Status.Should().Be("Error");
+        body.Message.Should().Contain("dateFrom");
+    }
+}

Api.SeaHavenIndustries/Controllers/WorkOrderController.cs

@@ -120,9 +120,16 @@ namespace Api.SeaHavenIndustries.Controllers
         [HttpGet("board/search")]
         public async Task<IActionResult> SearchBoard([FromQuery] WorkOrderAdvancedSearchQueryDto query)
         {
-            var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
-            var result = await _advancedSearchService.SearchAsync(query, userId);
-            return Ok(result);
+            try
+            {
+                var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
+                var result = await _advancedSearchService.SearchAsync(query, userId);
+                return Ok(result);
+            }
+            catch (ArgumentException ex)
+            {
+                return BadRequest(new Response { Status = "Error", Message = ex.Message });
+            }
         }
 
         [HttpGet("lookups/dispatchers")]