feat(web): improve invite landing recovery

apps/web/app/globals.css

@@ -62,13 +62,20 @@ body {
   border-radius: 16px;
 }
 
-.glass-light {
+.glass-light {
   background: rgba(22, 33, 62, 0.6);
   backdrop-filter: blur(20px);
   -webkit-backdrop-filter: blur(20px);
   border: 1px solid rgba(255, 255, 255, 0.12);
   border-radius: 16px;
-}
+}
+
+/* Solid pairing surface. Join links must not rely on glass or blur. */
+.surface-solid {
+  background: #17171c;
+  border: 1px solid #303036;
+  border-radius: 16px;
+}
 
 /* Gradient text */
 .gradient-text {