feat: add telegram mini app dashboard

src/GmRelay.Web/wwwroot/app.css

@@ -1,5 +1,5 @@
 /* ============================================
-   GM-Relay Design System v1.8.2
+   GM-Relay Design System v1.9.0
    Dark RPG Dashboard Theme
    ============================================ */
 
@@ -842,6 +842,46 @@ select option {
     margin-bottom: 2rem;
 }
 
+/* === Telegram Mini App entry === */
+.mini-app-page {
+    min-height: 100vh;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    padding: 1rem;
+    background: var(--bg-primary);
+}
+
+.mini-app-auth-card {
+    width: 100%;
+    max-width: 360px;
+    padding: 1.5rem;
+    border: 1px solid var(--glass-border);
+    border-radius: var(--radius-md);
+    background: var(--glass-bg);
+    text-align: center;
+}
+
+.mini-app-logo {
+    font-size: 2.25rem;
+    margin-bottom: 0.75rem;
+}
+
+.mini-app-auth-card h1 {
+    font-size: 1.375rem;
+    margin-bottom: 0.5rem;
+}
+
+.mini-app-auth-card p {
+    color: var(--text-secondary);
+    font-size: 0.875rem;
+    margin-bottom: 1.25rem;
+}
+
+.telegram-mini-app .page-container {
+    max-width: 720px;
+}
+
 /* === Mobile Sessions Cards (instead of table) === */
 .session-card-mobile {
     display: none;
@@ -928,6 +968,14 @@ select option {
         padding: 1rem;
     }
 
+    .telegram-mini-app .content {
+        padding: 0.75rem;
+    }
+
+    .telegram-mini-app .page-container {
+        padding: 0.75rem;
+    }
+
     h2 {
         font-size: 1.25rem;
     }