Build flashsharp flashcard app

src/Flashsharp/Pages/Courses/Details.cshtml

@@ -0,0 +1,54 @@
+@page "/courses/{id:long}"
+@model Courses.DetailsModel
+@{
+    ViewData["Title"] = Model.Course.Name;
+    var breadcrumb = new BreadcrumbView(
+        [
+            new Crumb("Courses", "/"),
+            new Crumb(Model.Course.Name, null)
+        ],
+        []);
+}
+
+<partial name="_Breadcrumb" model="breadcrumb" />
+
+<section class="fs-page-head">
+    <p class="fs-eyebrow">Course</p>
+    <h1 class="fs-page-title" dir="auto">@Model.Course.Name</h1>
+    @if (!string.IsNullOrWhiteSpace(Model.Course.Description))
+    {
+        <p class="fs-page-description" dir="auto">@Model.Course.Description</p>
+    }
+</section>
+
+@if (Model.Lessons.Count == 0)
+{
+    <section class="fs-empty">
+        <p>No lessons yet. Ask your agent to create one in this course.</p>
+    </section>
+}
+else
+{
+    <div class="fs-list">
+        @foreach (var lesson in Model.Lessons)
+        {
+            <a class="fs-row" asp-page="/Lessons/Details" asp-route-id="@lesson.Id">
+                <div class="fs-row-main">
+                    <h2 class="fs-row-title" dir="auto">@lesson.Name</h2>
+                    @if (!string.IsNullOrWhiteSpace(lesson.Description))
+                    {
+                        <p class="fs-row-subtitle" dir="auto">@Display.Preview(lesson.Description, 140)</p>
+                    }
+                </div>
+                <div class="fs-row-meta">
+                    <span>@lesson.DeckCount decks</span>
+                    <span>@lesson.CardCount cards</span>
+                    @if (lesson.DueCount > 0)
+                    {
+                        <span class="fs-due-pill">@lesson.DueCount due</span>
+                    }
+                </div>
+            </a>
+        }
+    </div>
+}

src/Flashsharp/Pages/Courses/Details.cshtml.cs

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+using Flashsharp.Auth;
+using Flashsharp.Data;
+using Flashsharp.Domain;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace Flashsharp.Pages.Courses;
+
+public sealed class DetailsModel(Store store) : PageModel
+{
+    public CourseSummary Course { get; private set; } = null!;
+
+    public IReadOnlyList<LessonSummary> Lessons { get; private set; } = [];
+
+    public async Task<IActionResult> OnGetAsync(long id, CancellationToken cancellationToken)
+    {
+        var userId = User.GetUserId();
+        var course = await store.GetCourseAsync(id, userId, cancellationToken);
+        if (course is null)
+        {
+            return NotFound();
+        }
+
+        Course = course;
+        Lessons = await store.ListLessonsAsync(id, userId, cancellationToken);
+        return Page();
+    }
+}