feat(web): add private club showcases with membership flow (v3.7.0)

Implements Issue #110: game masters can now publish sessions
exclusively to a club's private showcase, gated behind a
member application and approval flow. Adds a 4-state
publication_mode (None/Catalog/ClubOnly/Both) replacing the
binary is_public, plus a club_memberships table with
Pending/Active/Rejected/Left lifecycle and partial unique
index ensuring a single Active row per (group, player).

Highlights
- V030 migration: club_memberships, publication_mode, drop
  is_public, recreate partial indexes, portfolio_games gains
  publication_mode.
- PublicationMode enum + extensions in GmRelay.Shared.
- ISessionStore gains 12 membership/showcase methods;
  AuthorizedMembershipService owns the membership flow with
  GM-only approve/reject authorization.
- PublicClub / PublicMasterProfile / PublicSession: member-
  aware queries (ClubOnly visible only to Active members).
- New pages: MyClubMemberships (/profile/memberships) and
  ClubApplications (/group/{id}/applications).
- GroupDetails and EditSession switch from a bool toggle to
  a 4-state publication_mode selector.
- NavMenu adds Moji kluby, PublicLayout adds Kluby.

Tests: 4 new test files (PublicationMode, ClubMemberships,
AuthorizedMembershipService, ClubShowcaseSource) + updates
to PublicClubPages, AuthorizedSessionService/Portfolio
service FakeSessionStore, CampaignTemplatesNavigation.
493 tests pass.

Bump version 3.6.0 -> 3.7.0 across Directory.Build.props,
compose.yaml, deploy.yml, NavMenu.razor.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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

@@ -7,6 +7,7 @@
 @attribute [Authorize]
 @inject AuthorizedSessionService SessionService
 @inject AuthorizedPortfolioService PortfolioService
+@inject AuthorizedMembershipService MembershipService
 @inject AuthenticationStateProvider AuthStateProvider
 @inject NavigationManager Navigation
 
@@ -126,6 +127,14 @@
         </div>
     }
 
+    @if (pendingApplicationsCount > 0)
+    {
+        <a class="glass-card applications-card" href="@($"/group/{GroupId}/applications")">
+            <span class="status-badge status-warning">📨 Заявки участников (@pendingApplicationsCount)</span>
+            <span>Рассмотреть заявки на участие в клубе</span>
+        </a>
+    }
+
     @if (!string.IsNullOrEmpty(errorMessage))
     {
         <div class="gm-alert gm-alert-danger" style="margin-bottom: 1rem;">
@@ -313,11 +322,12 @@
                         <span class="status-badge @(batch.AllSessionsPublic ? "status-success" : batch.PublicSessionCount > 0 ? "status-warning" : "status-neutral")">
                             @FormatBatchPublication(batch)
                         </span>
-                        <button type="button" class="btn-gm btn-gm-outline" disabled="@IsBatchPublishBusy(batch)" @onclick="() => SetBatchPublic(batch, !batch.AllSessionsPublic)">
-                            @(IsBatchPublishBusy(batch)
-                                ? "Обновляем..."
-                                : batch.AllSessionsPublic ? "Скрыть batch" : "Опубликовать batch")
-                        </button>
+                        <select class="gm-form-control" disabled="@IsBatchPublishBusy(batch)" @onchange="args => SetBatchPublicationMode(batch, ParseMode(args.Value))">
+                            <option value="None" selected="@(batch.PublicationMode == PublicationMode.None)">Скрыта</option>
+                            <option value="Catalog" selected="@(batch.PublicationMode == PublicationMode.Catalog)">Каталог</option>
+                            <option value="ClubOnly" selected="@(batch.PublicationMode == PublicationMode.ClubOnly)">Только участники</option>
+                            <option value="Both" selected="@(batch.PublicationMode == PublicationMode.Both)">Каталог + клуб</option>
+                        </select>
                     </div>
 
                     <div class="batch-clone-row">
@@ -369,11 +379,12 @@
                             <td>
                                 <div class="session-table-actions">
                                     <span class="status-badge @GetPublicationStatusClass(session)">@FormatPublicationStatus(session)</span>
-                                    <button type="button" class="btn-gm btn-gm-outline" disabled="@(publishingSessionId == session.Id)" @onclick="() => SetSessionPublic(session.Id, !session.IsPublic)">
-                                        @(publishingSessionId == session.Id
-                                            ? "Обновляем..."
-                                            : session.IsPublic ? "Скрыть" : "Опубликовать")
-                                    </button>
+                                    <select class="gm-form-control" disabled="@(publishingSessionId == session.Id)" @onchange="args => SetSessionPublicationMode(session.Id, ParseMode(args.Value))">
+                                        <option value="None" selected="@(session.PublicationMode == PublicationModeExtensions.NoneValue)">Скрыта</option>
+                                        <option value="Catalog" selected="@(session.PublicationMode == PublicationModeExtensions.CatalogValue)">Каталог</option>
+                                        <option value="ClubOnly" selected="@(session.PublicationMode == PublicationModeExtensions.ClubOnlyValue)">Только участники</option>
+                                        <option value="Both" selected="@(session.PublicationMode == PublicationModeExtensions.BothValue)">Каталог + клуб</option>
+                                    </select>
                                     @if (session.IsPublic && publicSettings?.PublicScheduleEnabled == true)
                                     {
                                         <a href="@PublicSessionUrl(session.Id)" target="_blank" rel="noopener noreferrer" class="btn-gm btn-gm-outline">Публичная ссылка</a>
@@ -466,11 +477,12 @@
                         </div>
                     </div>
                     <div class="session-card-actions">
-                        <button type="button" class="btn-gm btn-gm-outline" style="flex: 1; justify-content: center; font-size: 0.8125rem; padding: 0.5rem;" disabled="@(publishingSessionId == session.Id)" @onclick="() => SetSessionPublic(session.Id, !session.IsPublic)">
-                            @(publishingSessionId == session.Id
-                                ? "Обновляем..."
-                                : session.IsPublic ? "Скрыть" : "Опубликовать")
-                        </button>
+                        <select class="gm-form-control" style="flex: 1; font-size: 0.8125rem; padding: 0.5rem;" disabled="@(publishingSessionId == session.Id)" @onchange="args => SetSessionPublicationMode(session.Id, ParseMode(args.Value))">
+                            <option value="None" selected="@(session.PublicationMode == PublicationModeExtensions.NoneValue)">Скрыта</option>
+                            <option value="Catalog" selected="@(session.PublicationMode == PublicationModeExtensions.CatalogValue)">Каталог</option>
+                            <option value="ClubOnly" selected="@(session.PublicationMode == PublicationModeExtensions.ClubOnlyValue)">Только участники</option>
+                            <option value="Both" selected="@(session.PublicationMode == PublicationModeExtensions.BothValue)">Каталог + клуб</option>
+                        </select>
                         @if (session.IsPublic && publicSettings?.PublicScheduleEnabled == true)
                         {
                             <a href="@PublicSessionUrl(session.Id)" target="_blank" rel="noopener noreferrer" class="btn-gm btn-gm-outline" style="flex: 1; justify-content: center; font-size: 0.8125rem; padding: 0.5rem;">Публичная ссылка</a>
@@ -540,6 +552,7 @@
     private IReadOnlyList<PortfolioGameSummary>? portfolioGames;
     private List<BatchBulkEditModel> batchModels = [];
     private List<CampaignTemplateUsageModel> campaignTemplateModels = [];
+    private int pendingApplicationsCount;
     private Guid? promotingSessionId;
     private Guid? processingBatchId;
     private Guid? processingTemplateId;
@@ -605,6 +618,8 @@
 
         portfolioGames = await PortfolioService.GetPortfolioGamesForCurrentUserAsync(GroupId);
 
+        pendingApplicationsCount = await MembershipService.GetPendingApplicationsCountForCurrentGmAsync(GroupId);
+
         RebuildBatchModels();
         RebuildCampaignTemplateModels();
         RebuildPublicSettingsModel();
@@ -664,7 +679,7 @@
         }
     }
 
-    private async Task SetBatchPublic(BatchBulkEditModel batch, bool isPublic)
+    private async Task SetBatchPublicationMode(BatchBulkEditModel batch, PublicationMode mode)
     {
         errorMessage = null;
         successMessage = null;
@@ -672,10 +687,14 @@
 
         try
         {
-            await SessionService.SetBatchPublicForCurrentUserAsync(batch.BatchId, isPublic);
-            successMessage = isPublic
-                ? "Batch опубликован в публичном расписании."
-                : "Batch скрыт из публичного расписания.";
+            await SessionService.SetBatchPublicationModeForCurrentUserAsync(batch.BatchId, mode);
+            successMessage = mode switch
+            {
+                PublicationMode.Catalog => "Batch опубликован в общем каталоге.",
+                PublicationMode.ClubOnly => "Batch доступен только участникам клуба.",
+                PublicationMode.Both => "Batch опубликован в каталоге и доступен участникам клуба.",
+                _ => "Batch скрыт из публичного расписания."
+            };
             await LoadSessions();
         }
         catch (SessionAccessDeniedException)
@@ -692,7 +711,7 @@
         }
     }
 
-    private async Task SetSessionPublic(Guid sessionId, bool isPublic)
+    private async Task SetSessionPublicationMode(Guid sessionId, PublicationMode mode)
     {
         errorMessage = null;
         successMessage = null;
@@ -700,10 +719,14 @@
 
         try
         {
-            await SessionService.SetSessionPublicForCurrentUserAsync(sessionId, isPublic);
-            successMessage = isPublic
-                ? "Сессия опубликована в публичном расписании."
-                : "Сессия скрыта из публичного расписания.";
+            await SessionService.SetSessionPublicationModeForCurrentUserAsync(sessionId, mode);
+            successMessage = mode switch
+            {
+                PublicationMode.Catalog => "Сессия опубликована в общем каталоге.",
+                PublicationMode.ClubOnly => "Сессия доступна только участникам клуба.",
+                PublicationMode.Both => "Сессия опубликована в каталоге и доступна участникам клуба.",
+                _ => "Сессия скрыта из публичного расписания."
+            };
             await LoadSessions();
         }
         catch (SessionAccessDeniedException)
@@ -1073,7 +1096,13 @@
                     IntervalDays = InferIntervalDays(orderedSessions),
                     SessionCount = orderedSessions.Count,
                     PublicSessionCount = orderedSessions.Count(session => session.IsPublic),
-                    AllSessionsPublic = orderedSessions.All(session => session.IsPublic)
+                    AllSessionsPublic = orderedSessions.All(session => session.IsPublic),
+                    PublicationMode = orderedSessions
+                        .Select(s => PublicationModeExtensions.FromDatabaseValue(s.PublicationMode))
+                        .GroupBy(m => m)
+                        .OrderByDescending(g => g.Count())
+                        .First()
+                        .Key
                 };
             })
             .OrderBy(batch => batch.FirstScheduledAtLocal)
@@ -1220,6 +1249,9 @@
             : seats;
     }
 
+    private static PublicationMode ParseMode(object? value) =>
+        Enum.TryParse<PublicationMode>(value?.ToString(), out var mode) ? mode : PublicationMode.None;
+
     private static string FormatBatchSummary(BatchBulkEditModel batch) =>
         $"{batch.SessionCount} игр · {FormatLocalMoscow(batch.FirstScheduledAtLocal)} — {FormatLocalMoscow(batch.LastScheduledAtLocal)}";
 
@@ -1272,6 +1304,7 @@
         public int SessionCount { get; init; }
         public int PublicSessionCount { get; init; }
         public bool AllSessionsPublic { get; init; }
+        public PublicationMode PublicationMode { get; set; } = PublicationMode.None;
         public string CloneInterval { get; set; } = "week";
     }