fix: compensate 100dvh layouts for the env banner's height

Shell and the public pages commit to exactly one viewport tall; without
this, the new dev-environment banner would push their bottom edge (and
Shell's bottom nav) past the visible viewport, the same overflow-leak
bug fixed earlier today.

myteamwallet_frontend_modern/src/app/features/public-team/public-player.scss

@@ -1,9 +1,12 @@
 :host {
-  display: block;
-  min-height: 100%;
+  display: flex;
+  flex-direction: column;
+  height: calc(100dvh - var(--env-banner-height, 0px));
+  overflow: hidden;
   // background: color-mix(in srgb, var(--mat-sys-primary-container) 18%, var(--mat-sys-surface));
 }
 .public-header {
+  flex-shrink: 0;
   height: 64px;
   padding: 0 max(20px, calc((100vw - 900px) / 2));
   display: flex;
@@ -22,6 +25,11 @@
   font-size: 1.1rem;
 }
 main {
+  flex: 1;
+  min-height: 0;
+  overflow-y: auto;
+}
+.page {
   max-width: 900px;
   margin: 0 auto;
   padding: 28px 24px 64px;
@@ -86,7 +94,7 @@ main {
   color: var(--mat-sys-on-surface-variant);
 }
 @media (max-width: 600px) {
-  main {
+  .page {
     padding: 22px 16px 48px;
   }
 }