修复场地课表遗漏借用的问题

tests/Jiaowu.Api.Tests/VenueDisplaysControllerTests.cs

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+using System.Text.Json;
+using Jiaowu.Api.Controllers;
+using Jiaowu.Api.Domain.Academic;
+using Jiaowu.Api.Domain.Identity;
+using Jiaowu.Api.Infrastructure.Persistence;
+using Jiaowu.Api.Infrastructure.Timetables;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Data.Sqlite;
+using Microsoft.EntityFrameworkCore;
+
+namespace Jiaowu.Api.Tests;
+
+public sealed class VenueDisplaysControllerTests
+{
+    [Fact]
+    public async Task Classroom_IncludesApprovedReservationForToday()
+    {
+        await using var connection = new SqliteConnection("Data Source=:memory:");
+        await connection.OpenAsync();
+        var db = new AppDbContext(new DbContextOptionsBuilder<AppDbContext>()
+            .UseSqlite(connection)
+            .Options);
+        await db.Database.EnsureCreatedAsync();
+
+        var today = DateOnly.FromDateTime(DateTime.Now);
+        var campus = new Campus { Code = "MAIN", Name = "主校区" };
+        var building = new Building { Code = "A", Name = "明德楼", CampusId = campus.Id };
+        var classroom = new Classroom { Code = "A101", Name = "A101", BuildingId = building.Id, Capacity = 60 };
+        var college = new College { Code = "CS", Name = "计算机学院" };
+        var applicant = new ApplicationUser
+        {
+            Id = Guid.NewGuid(), UserName = "applicant", NormalizedUserName = "APPLICANT",
+            DisplayName = "张老师", CollegeId = college.Id
+        };
+        var term = new AcademicTerm
+        {
+            Code = "CURRENT", Name = "当前学期", AcademicYear = "2026-2027", Season = TermSeason.Autumn,
+            StartDate = today.AddDays(-7), EndDate = today.AddDays(120), IsCurrent = true
+        };
+        db.AddRange(campus, building, classroom, college, applicant, term);
+        db.ClassroomReservations.Add(new ClassroomReservation
+        {
+            ApplicantUserId = applicant.Id, ApplicantName = applicant.DisplayName,
+            ApplicantCollegeId = college.Id, AcademicTermId = term.Id, ClassroomId = classroom.Id,
+            ReservationDate = today, StartPeriod = 3, PeriodCount = 2, AttendeeCount = 30,
+            Purpose = "学院学术讲座", ContactPhone = "13800000000",
+            Status = ClassroomReservationStatus.Approved
+        });
+        await db.SaveChangesAsync();
+
+        var controller = new VenueDisplaysController(
+            db,
+            new TimetableDataService(db),
+            new ClassroomReservationAvailabilityService(db));
+
+        var result = await controller.Classroom(classroom.Id, CancellationToken.None);
+
+        var response = Assert.IsType<OkObjectResult>(result).Value;
+        using var document = JsonDocument.Parse(JsonSerializer.Serialize(response));
+        var entry = Assert.Single(document.RootElement.GetProperty("Entries").EnumerateArray());
+        Assert.Equal("教室借用", entry.GetProperty("CourseName").GetString());
+        Assert.Equal("学院学术讲座", entry.GetProperty("ClassNames")[0].GetString());
+        Assert.Equal("张老师", entry.GetProperty("TeacherNames")[0].GetString());
+        Assert.True(entry.GetProperty("IsReservation").GetBoolean());
+    }
+}