feat(web): add public master profiles

Add sanitized public GM profiles with publication controls, public /gm/{slug} pages, and links from public game surfaces.

Bump version -> 3.5.0

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

@@ -38,6 +38,15 @@ else if (club is not null)
             <span>Ссылка клуба</span>
             <a href="@PublicClubUrl" target="_blank" rel="noopener noreferrer">@PublicClubUrl</a>
         </div>
+        @if (!string.IsNullOrWhiteSpace(club.MasterProfileSlug))
+        {
+            <div class="public-share-row">
+                <span>Мастер</span>
+                <a href="@MasterProfilePath(club.MasterProfileSlug)" target="_blank" rel="noopener noreferrer">
+                    @(club.MasterDisplayName ?? "Профиль мастера")
+                </a>
+            </div>
+        }
     </section>
 
     @if (club.Sessions.Count == 0)
@@ -92,6 +101,8 @@ else if (club is not null)
 
     private string PublicSessionPath(Guid sessionId) => $"/s/{sessionId}";
 
+    private static string MasterProfilePath(string slug) => $"/gm/{slug}";
+
     private static string FormatSeats(WebPublicSession session)
     {
         var seats = session.MaxPlayers.HasValue