refactor: migrate tenant bootstrap to use SSR state caching and update button components to use CSS tenant variables

src/app/app.scss

@@ -1,3 +1,68 @@
 :host {
   display: block;
+  min-height: 100dvh;
+}
+
+.tenant-status {
+  min-height: 100dvh;
+  display: grid;
+  place-items: center;
+  padding: 2rem;
+  background:
+    radial-gradient(circle at top, color-mix(in srgb, white 82%, var(--tenant-primary)) 0%, transparent 55%),
+    linear-gradient(180deg, #f8f8f8 0%, #efefef 100%);
+  color: #202020;
+}
+
+.tenant-status__card {
+  width: min(100%, 34rem);
+  padding: 2rem;
+  border: 1px solid rgba(32, 32, 32, 0.1);
+  border-radius: 1.5rem;
+  background-color: rgba(255, 255, 255, 0.92);
+  box-shadow: 0 1.25rem 3rem rgba(0, 0, 0, 0.1);
+}
+
+.tenant-status__code {
+  display: inline-block;
+  margin-bottom: 1rem;
+  font-size: 0.8rem;
+  font-weight: 700;
+  letter-spacing: 0.24em;
+  text-transform: uppercase;
+  color: var(--tenant-primary);
+}
+
+.tenant-status__title {
+  margin: 0 0 0.75rem;
+  font-size: clamp(2rem, 4vw, 2.75rem);
+  line-height: 1.05;
+}
+
+.tenant-status__description {
+  margin: 0;
+  font-size: 1rem;
+  line-height: 1.6;
+  color: rgba(32, 32, 32, 0.72);
+}
+
+.tenant-status--loading {
+  background:
+    radial-gradient(circle at center, color-mix(in srgb, white 88%, var(--tenant-primary)) 0%, transparent 60%),
+    #f5f5f5;
+}
+
+.tenant-status__spinner {
+  width: 3rem;
+  height: 3rem;
+  border: 0.25rem solid rgba(32, 32, 32, 0.08);
+  border-top-color: var(--tenant-primary);
+  border-radius: 999px;
+  animation: tenant-status-spin 0.8s linear infinite;
+}
+
+@keyframes tenant-status-spin {
+  to {
+    transform: rotate(360deg);
+  }
 }