feat: implement Blazor web interface for GM session management

- Created GmRelay.Web project (Blazor Server)
- Created GmRelay.Shared library for domain models and rendering
- Refactored GmRelay.Bot to use the Shared library
- Integrated Telegram Login widget with server-side HMAC verification
- Added Dashboard, Group Details, and Edit Session pages
- Enabled bot notifications and in-place message updates from web actions
- Updated .NET Aspire orchestration and Docker Compose configuration

src/GmRelay.Web/Components/Layout/NavMenu.razor

@@ -0,0 +1,41 @@
+<div class="top-row ps-3 navbar navbar-dark">
+    <div class="container-fluid">
+        <a class="navbar-brand" href="">GM-Relay Web</a>
+    </div>
+</div>
+
+<input type="checkbox" title="Navigation menu" class="navbar-toggler" />
+
+<div class="nav-scrollable" onclick="document.querySelector('.navbar-toggler').click()">
+    <nav class="nav flex-column">
+        <AuthorizeView>
+            <Authorized>
+                <div class="nav-item px-3">
+                    <NavLink class="nav-link" href="" Match="NavLinkMatch.All">
+                        <span class="bi bi-house-door-fill-nav-menu" aria-hidden="true"></span> Dashboard
+                    </NavLink>
+                </div>
+                <div class="nav-item px-3 mt-auto">
+                    <div class="nav-link text-light">
+                        <span class="bi bi-person-fill" aria-hidden="true"></span> @context.User.Identity?.Name
+                    </div>
+                </div>
+                <div class="nav-item px-3">
+                    <form action="/auth/logout" method="post">
+                        <AntiforgeryToken />
+                        <button type="submit" class="nav-link btn btn-link text-light text-start w-100 p-0 shadow-none border-0">
+                            <span class="bi bi-box-arrow-right" aria-hidden="true"></span> Logout
+                        </button>
+                    </form>
+                </div>
+            </Authorized>
+            <NotAuthorized>
+                <div class="nav-item px-3">
+                    <NavLink class="nav-link" href="login">
+                        <span class="bi bi-person-badge-nav-menu" aria-hidden="true"></span> Login
+                    </NavLink>
+                </div>
+            </NotAuthorized>
+        </AuthorizeView>
+    </nav>
+</div>