test: add SearchApiClientIntegrationTests for search endpoint validation

Add integration tests for SearchApiClient covering:
- GetUserSearchesAsync with authentication returns success
- GetUserSearchesAsync without authentication returns unauthorized
- GetSearchAsync with non-existent ID returns not found

NEW/tests/JdeScoping.Api.IntegrationTests/ClientIntegration/SearchApiClientIntegrationTests.cs

@@ -0,0 +1,50 @@
+using JdeScoping.Client.Services;
+using Shouldly;
+
+namespace JdeScoping.Api.IntegrationTests.ClientIntegration;
+
+public class SearchApiClientIntegrationTests : ClientIntegrationTestBase
+{
+    public SearchApiClientIntegrationTests(TestWebApplicationFactory factory) : base(factory) { }
+
+    [Fact]
+    public async Task GetUserSearchesAsync_WithAuth_ReturnsSearchList()
+    {
+        // Arrange
+        await LoginAsync();
+
+        // Act
+        var result = await SearchClient.GetUserSearchesAsync();
+
+        // Assert
+        result.IsSuccess.ShouldBeTrue();
+        result.Value.ShouldNotBeNull();
+    }
+
+    [Fact]
+    public async Task GetUserSearchesAsync_WithoutAuth_ReturnsUnauthorized()
+    {
+        // Arrange - use fresh client without cookies
+        var freshClient = new SearchApiClient(CreateFreshClient());
+
+        // Act
+        var result = await freshClient.GetUserSearchesAsync();
+
+        // Assert
+        result.IsUnauthorized.ShouldBeTrue();
+    }
+
+    [Fact]
+    public async Task GetSearchAsync_NotFound_ReturnsNotFound()
+    {
+        // Arrange
+        await LoginAsync();
+        var nonExistentId = 999999;
+
+        // Act
+        var result = await SearchClient.GetSearchAsync(nonExistentId);
+
+        // Assert
+        result.IsNotFound.ShouldBeTrue();
+    }
+}