feat(web): update public session detail with showcase fields

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/GmRelay.Web/Components/Pages/PublicSession.razor

@@ -2,6 +2,7 @@
 @layout PublicLayout
 @inject ISessionStore SessionStore
 @inject NavigationManager Navigation
+@using GmRelay.Shared.Features.Showcase
 
 <PageTitle>@PageTitleText</PageTitle>
 
@@ -30,10 +31,29 @@ else if (session is not null)
         <meta name="description" content="@($"Публичная сессия {session.Title} клуба {session.GroupName} в GM-Relay.")" />
     </HeadContent>
 
+    @if (!string.IsNullOrWhiteSpace(session.CoverImageUrl))
+    {
+        <div class="session-cover-hero" style="background-image: url('@session.CoverImageUrl')"></div>
+    }
+
     <section class="public-hero public-hero-compact">
         <span class="status-badge @GetStatusClass(session.Status)">@TranslateStatus(session.Status)</span>
         <h1>@session.Title</h1>
         <p>@session.GroupName</p>
+        <div class="session-badges">
+            @if (!string.IsNullOrWhiteSpace(session.System))
+            {
+                <span class="status-badge status-info">@GetSystemDisplayName(session.System)</span>
+            }
+            @if (session.IsOneShot)
+            {
+                <span class="status-badge status-warning">Ваншот</span>
+            }
+            @if (!string.IsNullOrWhiteSpace(session.Format))
+            {
+                <span class="status-badge status-neutral">@TranslateFormat(session.Format)</span>
+            }
+        </div>
     </section>
 
     <article class="glass-card public-session-detail">
@@ -50,14 +70,33 @@ else if (session is not null)
                 <span>Статус</span>
                 <strong>@TranslateStatus(session.Status)</strong>
             </div>
+            @if (session.DurationMinutes.HasValue)
+            {
+                <div>
+                    <span>Длительность</span>
+                    <strong>@FormatDuration(session.DurationMinutes.Value)</strong>
+                </div>
+            }
         </div>
 
+        @if (!string.IsNullOrWhiteSpace(session.Description))
+        {
+            <div class="session-description">
+                <h3>Описание</h3>
+                <p>@session.Description</p>
+            </div>
+        }
+
         <div class="public-settings-actions">
             @if (!string.IsNullOrWhiteSpace(session.GroupSlug))
             {
                 <a class="btn-gm btn-gm-primary" href="@($"/club/{session.GroupSlug}")">Расписание клуба</a>
             }
             <a class="btn-gm btn-gm-outline" href="@PublicSessionUrl" target="_blank" rel="noopener noreferrer">Ссылка на сессию</a>
+            @if (session.AllowDirectRegistration)
+            {
+                <a class="btn-gm btn-gm-primary" href="@($"/s/{SessionId}?register=1")">Записаться</a>
+            }
         </div>
     </article>
 }
@@ -65,7 +104,7 @@ else if (session is not null)
 @code {
     [Parameter] public Guid SessionId { get; set; }
 
-    private WebPublicSession? session;
+    private ShowcaseSessionDto? session;
     private bool loaded;
 
     private string PageTitleText => session is null ? "Публичная сессия — GM-Relay" : $"{session.Title} — GM-Relay";
@@ -75,11 +114,11 @@ else if (session is not null)
     protected override async Task OnParametersSetAsync()
     {
         loaded = false;
-        session = await SessionStore.GetPublicSessionAsync(SessionId);
+        session = await SessionStore.GetShowcaseSessionAsync(SessionId);
         loaded = true;
     }
 
-    private static string FormatSeats(WebPublicSession session)
+    private static string FormatSeats(ShowcaseSessionDto session)
     {
         var seats = session.MaxPlayers.HasValue
             ? $"{session.ActivePlayerCount}/{session.MaxPlayers.Value}"
@@ -90,6 +129,35 @@ else if (session is not null)
             : seats;
     }
 
+    private static string FormatDuration(int minutes)
+    {
+        if (minutes < 60)
+            return $"{minutes} мин";
+
+        var hours = minutes / 60;
+        var mins = minutes % 60;
+        return mins > 0 ? $"{hours} ч {mins} мин" : $"{hours} ч";
+    }
+
+    private static string GetSystemDisplayName(string? system)
+    {
+        if (string.IsNullOrWhiteSpace(system))
+            return system ?? string.Empty;
+
+        if (Enum.TryParse<GameSystem>(system, out var gs))
+            return gs.ToDisplayName();
+
+        return system;
+    }
+
+    private static string TranslateFormat(string format) => format switch
+    {
+        "Online" => "Онлайн",
+        "Offline" => "Офлайн",
+        "Hybrid" => "Гибрид",
+        _ => format
+    };
+
     private static string GetStatusClass(string status) => status switch
     {
         SessionStatus.Confirmed => "status-success",