UI/runtime polish, session rotation limit, login errors, docs update

app/static/style.css

@@ -322,7 +322,8 @@ button {
   color: #fff;
 }
 .tile {
-  display: block;
+  display: flex;
+  flex-direction: column;
   text-decoration: none;
   background: var(--card);
   color: inherit;
@@ -368,6 +369,16 @@ button {
   margin-top: 0.45rem;
   color: #4b6178;
 }
+.tile-comment {
+  max-height: 96px;
+  overflow: auto;
+  line-height: 1.35;
+  padding-right: 0.2rem;
+}
+.tile-comment b,
+.tile-comment strong {
+  font-weight: 700;
+}
 .service-categories {
   margin-top: 0.7rem;
   display: flex;